ALBERT

Description:    The compounds KNaCaTh(Si 8 O 20 ) and Ca 2 Th(Si 8 O 20 ) were prepared for the first time by solidphase synthesis. The temperature dependences of the unit cell parameters were studied by high-temperature X-ray diffraction, and the thermal expansion coefficients of the compounds were determined. The IR bands of the compounds were assigned. The incongruent melting point of KNaCaTh(Si 8 O 20 ) was determined by differential scanning calorimetry. Content Type Journal Article Pages 431-434 DOI 10.1134/S1066362212050025 Authors A. V. Knyazev, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia N. G. Chernorukov, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia M. E. Komshina, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Correlation between the yield of free radicals in radiolysis of organic substances and the physicochemical characteristics of these substances can be quantitatively formulated in the form of multiparameter equations based on the linear free energy relationship. The major effect is exerted by the parameters of the capability of liquids for specific interactions. Content Type Journal Article Pages 509-510 DOI 10.1134/S1066362212050177 Authors R. G. Makitra, Department of Physical Chemistry of Fossil Fuels, Litvinenko Institute of Physical Organic and Coal Chemistry, National Academy of Sciences of Ukraine, ul. Nauchnaya 3a, Lviv, 79060 Ukraine G. G. Midyana, Department of Physical Chemistry of Fossil Fuels, Litvinenko Institute of Physical Organic and Coal Chemistry, National Academy of Sciences of Ukraine, ul. Nauchnaya 3a, Lviv, 79060 Ukraine E. Ya. Pal’chikova, Institute of Geology and Geochemistry of Fossil Fuels, National Academy of Sciences of Ukraine, Lviv, Ukraine Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    The performance of certain rocks (shungite, vermiculite, montmorillonite) in chemical water treatment is evaluated. Vermiculite packing ensures high efficiency of water decontamination from 137 Cs. Content Type Journal Article Pages 489-491 DOI 10.1134/S10663622120500128 Authors G. A. Skorobogatov, Chemical Faculty, St. Petersburg State University, Universitetskii pr. 26, St. Petersburg, 198504 Russia V. V. Eremin, Chemical Faculty, St. Petersburg State University, Universitetskii pr. 26, St. Petersburg, 198504 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    The radiation hazard of the Klivazh object (Yunkom mine, Enakievo, Donetsk oblast, Ukraine) was evaluated, alternative ways of the mine decommissioning were considered, and the radiation hazard of the mine flooding was assessed. Specimens simulating the virtified glass-ceramic melt formed by the nuclear explosion were fabricated, and their chemical resistance (solubility) was examined by leaching of U, Cs, and Sr. The U, Cs, and Sr concentrations in water flowing over the explosion cavity were determined. When the tunnels of only two lower horizons (936 and 826 m) will be flooded, the radionuclide concentrations in the mine water will not exceed 10 −4 PC C ingest (PC C ingest is the permissible concentration in potable water for population, established in the Ukraine). Content Type Journal Article Pages 516-520 DOI 10.1134/S1066362212050190 Authors V. N. Bondarenko, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine A. V. Goncharov, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine Yu. A. Gordienko, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine A. V. Mazilov, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine B. N. Razsukovannyi, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine S. Yu. Saenko, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine V. I. Sukhostavets, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine A. G. Tolstolutskii, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine V. N. Tkachenko, Kharkov Physicotechnical Institute, National Scientific Center, ul. Akademicheskaya 1, Kharkov, 61108 Ukraine Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Analysis of published data shows that H 2 O 2 arising in radiolysis of acidic aqueous solutions is in the excited state and reacts with Pu(VI) and Am(V) faster than in the case when in it is introduced into the system with actinide ions from the outside. Content Type Journal Article Pages 455-458 DOI 10.1134/S1066362212050062 Authors V. P. Shilov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. V. Gogolev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Addition of small (1–5 vol %) amounts of ionic liquids (ILs) increases the Am(III) distribution ratio in the system with diphenyl(dibutylcarbamoylmethyl)phosphine oxide (Ph 2 Bu 2 ) by more than 2 orders of magnitude. With 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C 4 mim] + Tf 2 N − ) used as IL, the Am(III) extraction is possible even from 8 M HNO 3 , which is important in radiochemical analysis of process and environmental samples, because many procedures are based on the transfer of solid samples into 8 M HNO 3 . The extraction data show that the extractable Am(III) complex contains three Ph 2 Bu 2 ligands, an IL anion, and two NO 3 − anions. Content Type Journal Article Pages 473-476 DOI 10.1134/S1066362212050098 Authors G. A. Pribylova, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia I. V. Smirnov, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, St. Petersburg, Russia A. P. Novikov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Analysis of published data on the stability of Ln 2+ and An 2+ in deaerated aqueous solutions and in solutions of tetrahydrofuran, hexamethylphosphoric triamide, and other solvents shows that the oxidation, following a first-order rate law, involves thermal excitation of the bivalent ion, fast formation of a complex of the excited and unexcited ions (excimer), and its decomposition into fragments, i.e.,. Ln 3+ or An 3+ and H 2 . Content Type Journal Article Pages 452-454 DOI 10.1134/S1066362212050050 Authors V. P. Shilov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. V. Gogolev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Crystalline uranyl compounds with furan-2-carboxylic (F2C) and thiophene-2-carboxylic (T2C) acids containing the complex anions [UO 2 (OOCC 4 H 3 O) 3 ] − and [UO 2 (OOCC 4 H 3 S) 3 ] − were synthesized and studied by single crystal X-ray diffraction. A previously unknown compound of a transuranium element, Pu(VI), with T2C, also containing the complex anions [PuO 2 (OOCC 4 H 3 S) 3 ] − , was synthesized. With Pu(VI) taken as example, the complexation of hexavalent actinides with F2C and T2C in aqueous solutions was studied, and the stability of the complexes PuO 2 L + (L is F2C or T2C anion) was determined. The Pu(VI) complexes with F2C are slightly more stable than those with T2C but less stable than Pu(VI) monoacetate complexes. The spectral characteristics of the complexes are discussed. Content Type Journal Article Pages 435-442 DOI 10.1134/S1066362212050037 Authors A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia M. S. Grigor’ev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. B. Yusov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Products of decomposition of the UO 2 (NO 3 ) 2 ·6H 2 O + Fe(NO 3 ) 3 ·9H 2 O mixture under the action of microwave radiation (MWR) were studied by thermal gravimetric, X-ray phase, and chemical analyses. The results obtained were compared to the published data for various U and Fe compounds. The final products of decomposition of the UO 2 (NO 3 ) 2 ·6H 2 O + Fe(NO 3 ) 3 ·9H 2 O mixture under the action of MWR for 3–5 min (the maximal temperature of the process, equal to 140–150°, is attained within 2–3 min of irradiation), apart from gaseous products, are UO 2 (OH)NO 3 , UO 3 , and Fe 2 O 3 . The action of MWR on the UO 2 (NO 3 ) 2 ·6H 2 O + Fe(NO 3 ) 3 ·9H 2 O mixture under the examined conditions does not lead to the formation of uranyl ferrite. Content Type Journal Article Pages 465-472 DOI 10.1134/S1066362212050086 Authors S. A. Kulyukhin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. N. Kamenskaya, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Extraction of microamounts of U(VI), Th(IV), and REE(III) from HNO 3 solutions in the form of complexes with 1,7-bis(dibutylcarbamoyl)-1,7-bis(diphenylphosphinyl)heptane ( I ) was studied. The influence of the composition of the aqueous and organic phases on the extraction efficiency was considered, and the stoichiometry of the extractable complexes was determined. The extraction of metal ions is considerably enhanced in the presence of an ionic liquid. In neutral media, compound I exhibits higher extraction ability than does its mono analog, (dibutylcarbamoylmethyl)diphenylphosphine oxide ( II ). Content Type Journal Article Pages 477-482 DOI 10.1134/S1066362212050104 Authors A. N. Turanov, Institute of Solid State Physics, Russian Academy of Sciences, ul. Akad. Osip’yana 2, Chernogolovka, Moscow oblast, 142432 Russia V. K. Karandashev, Institute of Technological Problems of Microelectronics and Ultrapure Materials, Russian Academy of Sciences, ul. Akad. Osip’yana 6, Chernogolovka, Moscow oblast, 142432 Russia A. N. Yarkevich, Institute of Physiologically Active Substances, Russian Academy of Sciences, Severnyi proezd 1, Chernogolovka, Moscow oblast, 142432 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    A simple method was developed for labeling N -{4-[(3-chloro-4-fluorophenyl)amino]quinazolin-6-yl}-3-bromopropionamide, an EGFR inhibitor, with radioactive iodine via nucleophilic iododebromination. The factors affecting the radiochemical yield of 125 I-EGFR such as reaction medium, substrate concentration, CuCl concentration, and temperature were examined. Reducing agents such as ascorbic acid, SnCl 2 , and Na 2 S 2 O 5 were used to prevent disproportionation. The radiochemical yield and purity of the labeled product were determined by TLC and HPLC. Content Type Journal Article Pages 497-500 DOI 10.1134/S1066362212050141 Authors N. Farouk, Labelled Compounds Department, Radioisotope Production and Radioactive Sources Division, Hot Laboratories Centre, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt H. E. Ramadan, Labelled Compounds Department, Radioisotope Production and Radioactive Sources Division, Hot Laboratories Centre, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt M. A. El-Amir, Labelled Compounds Department, Radioisotope Production and Radioactive Sources Division, Hot Laboratories Centre, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    A method was suggested for studying the dynamic sorption properties of ferrocyanide sorbents toward Cs radionuclides by analyzing the radiocesium distribution in the solid phase of the sorbent. The dynamic sorption characteristics are determined by measuring the activity of successive sorbent layers after passing definite volumes of the solution. The method is efficient in analysis of the stability of various sorbents in liquid media. The sorption characteristics of the following ferrocyanide sorbents were examined: Termoksid-35 (nickel-potassium ferrocyanide on zirconium hydroxide), FNS-2 (nickel-potassium ferrocyanide on silica), and FS-2 (copper-potassium ferrocyanide on silica). In alkaline solutions, Termoksid-35 is the most stable. The effect of oxalic acid on the activity distribution in a ferrocyanide sorbent bed was studied. In alkaline solutions containing oxalic acid, copper ferrocyanide (FS-2) is the least stable. At the same time, at low pH values and in the absence of oxalic acid, it is preferable to use sorbents based on copper ferrocyanides. Content Type Journal Article Pages 483-488 DOI 10.1134/S1066362212050116 Authors A. M. Egorin, Institute of Chemistry, Far-Eastern Division, Russian Academy of Sciences, pr. 100-Letiya Vladivostoka 159, Vladivostok, 690022 Russia V. A. Avramenko, Institute of Chemistry, Far-Eastern Division, Russian Academy of Sciences, pr. 100-Letiya Vladivostoka 159, Vladivostok, 690022 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Interaction of actinides(IV) with hydroxyisobutyric acid (HHIB) in aqueous solutions and in the course of crystallization of solid compounds was studied. The complexes ML n (4- n )+ (M = U, Np, Pu; L − is hydroxyisobutyrate anion; n = 1, 2, 3) exist in solution. Their apparent stepwise stability constants K ′ i were measured, and the overall concentration stability constants β 3 of the complexes ML 3 + were calculated. For U(IV) and Np(IV), logβ 3 is close to 13.3–13.4, and for Pu(IV), logβ 3 = 14.5 ± 0.9 (ionic strength I = 0.1–0.3). In the course of crystallization in air, complexes of U(IV) with hydroxyisobutyric acid, as well as those with citric acid, undergo oxidative degradation, which can be accompanied by complete oxidation of U(IV). The crystalline compounds formed in the process are oxalates of U(IV) or U(VI). The complexation of Np(V) with HHIB was studied. NpO 2 + forms with HHIB the complexes NpO 2 L and NpO 2 L 2 − . Their concentration stability constants are log K 1 = 2.04 ± 0.15 and log K 2 = 0.71 ± 0.10 ( I = 0.4), i.e., logβ 2 = 2.75 ± 0.25. Content Type Journal Article Pages 443-451 DOI 10.1134/S1066362212050049 Authors A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia M. S. Grigor’ev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. B. Yusov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    1-Naphthylcarbamoylmethyliminodiacetic acid (NIDA) and diphenylmethylcarbamoylmethyliminodiacetic acid (DMIDA) were synthesized, characterized, and labeled with 99 m Tc using SnCl 2 as reducing agent. The parameters affecting the yield of 99 m Tc-NIDA and 99 m Tc-DMIDA were studied in detail. The optimum conditions ensuring high yield of 99 m Tc-NIDA (94.2 ± 2%) and 99 m Tc-DMIDA (93.1 ± 2%) are as follows: 30 mg of NIDA or DMIDA, 0.3 mg of SnCl 2 ·H 2 O, pH 6, 15 min. The biodistribution in mice injected with 99 m Tc-NIDA and 99 m Tc-DMIDA showed high liver uptake at 10 min post injection, with fast biliary excretion. Accumulation of the activity in kidneys was negligible, especially after a long time post injection. Both 99 m Tc-NIDA and 99 m Tc-DMIDA can be applied as hepatobiliary imaging agents for the evaluation of the functional status of the hepatocytes and the patency of the biliary duct. Content Type Journal Article Pages 501-505 DOI 10.1134/S1066362212050153 Authors M. A. Motaleb, Labeled Compounds Department, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt H. El-Said, Radioactive Isotopes and Generator Department, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt M. Abdallah, Faculty of Science, Zagazig University, Cairo, Egypt M. Atef, Radioactive Isotopes and Generator Department, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Decomposition of hydroxylamine in HNO 3 solutions containing 350 to 920 g l −1 U(VI) was studied. In the absence of fission and corrosion products (Zr, Pd, Tc, Mo, Fe, etc.), hydroxylamine is stable for no less than 6 h at [HNO 3 ] 〈 1 M and 60°C. In the presence of these products, the stability of hydroxylamine appreciably decreases. The reduction of Pu(IV) and Np(VI) with hydroxylamine in aqueous 0.33 and 0.5 M HNO 3 solutions containing 850 g l −1 U(VI) and fission and corrosion products at 60°C was studied. Np(VI) is rapidly reduced to Np(V), after which Np(V) is partially reduced to Np(IV). The rate of the latter reaction in such solutions is considerably higher than the rate of the Np(V) reduction with hydroxylamine in HNO 3 solutions without U(VI). At [HNO 3 ] = 0.33 M, the use of hydroxylamine results in the conversion of Pu to Pu(III) and of Np to a Np(IV,V) mixture, whereas at [HNO 3 ] = 0.5 M the final products are Pu(IV) and Np(V). Content Type Journal Article Pages 459-464 DOI 10.1134/S1066362212050074 Authors V. I. Marchenko, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia K. N. Dvoeglazov, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia O. A. Savilova, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia V. I. Volk, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    The possibility of preparing by self-propagating high-temperature synthesis (SHS) metal-ceramic (cermet) matrices with simulated wastes of REE-actinide fraction and Tc was examined. The specimens consist of oxide crystalline phases, glass, and melts. In the aluminate composite, the component (Sm) simulating the REE-actinide fraction is in the garnet and glass phases, and in the titanate composite, in the pyrochlore, titanosilicate of perrierite structure, and glass phases. Rhenium (Tc simulator) is incorporated in alloy phases. To evaluate the prospects for radioactive waste immobilization by SHS, it is necessary to synthesize matrices containing actinide isotopes (Am) and Tc and to study their structure and isolation properties. Content Type Journal Article Pages 511-515 DOI 10.1134/S1066362212050189 Authors N. P. Laverov, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia S. V. Yudintsev, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia E. E. Konovalov, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, Obninsk, Kaluga oblast, Russia M. S. Nikol’skii, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia T. O. Mishevets, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, Obninsk, Kaluga oblast, Russia B. S. Nikonov, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia B. I. Omel’yanenko, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Zirconyl molybdopyrophosphate (ZMPP) inorganic ion exchanger was synthesized by precipitation and used for preparing a 60 Co sealed source. The distribution coefficient of 60 Co(II) ions on ZMPP was determined in relation to the HCl concentration. The saturation capacity of ZMPP for 60 Co(II) was determined by the batch method to be 1.33 mmol g −1 . The ZMPP ion exchanger was loaded with 60 Co radionuclides by equilibrating a 60 Co solution with 1 g of ZMPP at pH 5 (HCl) for 48 h at 25 ± 1°C. A sealed source of 1.04 μCi 60 Co (±5%) was prepared by packing 100 mg of the loaded matrix in the cylindrical cavity of a Chinese Artelone capsule. After radiometric standardization and encapsulation, the sealed source was submitted to quality control tests and finally checked radiometrically before release to the local market for calibration of radiation measurements and identification instruments. Content Type Journal Article Pages 492-496 DOI 10.1134/S106636221205013X Authors S. A. Shady, Nuclear Fuel Technology Department, Hot Laboratories Center, Atomic Energy Authority, P.O. 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    Published data on precision spectorphotometric determination of U, Th, Pu, and other elements of the nuclear fuel cycle in solutions on a two-channel analyzer with the relative random uncertainty S r = 0.1–0.2% are summarized. The method was used for certification and fabrication of Pu and U total weight fraction standards for mass spectrometer calibration. New data on precision determination of U, Ru, Er, Gd, Sm, Re, and Tc on serial Shimadzu UV devices in the photometric mode with the relative random uncertainty S r = 0.02–0.04% are presented. The relative total uncertainty that can be attained with the spectrophotometric method is as low as 0.03–0.05%, which makes this method competitive with other precision methods used. Content Type Journal Article Pages 419-430 DOI 10.1134/S1066362212050013 Authors S. A. Nikitina, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia T. D. Gogoleva, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia S. N. Voronina, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    A procedure based on nuclear-chemical generation of free nucleogenic reactive species was developed for the synthesis of difluorobenzene double-labeled with tritium as a precursor for the generation of previously unknown difluorophenyl cations. Content Type Journal Article Pages 506-508 DOI 10.1134/S1066362212050165 Authors V. V. Avrorin, St. Petersburg State University, St. Petersburg, Russia N. E. Shchepina, Natural Science Institute, Perm State National Research University, ul. Genkelya 4, Perm, 614990 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 5

Description:    A sample of WWER-1000 spent nuclear fuel (SNF) with the burn-up of approximately 50 GW day (t U) −1 was studied by methods of destructive analysis. Data on the content of isotopes of U, Pu, Am, Cm, Nd, and Cs are given. The methods used are briefly described. These include anion exchange and extraction chromatography, thermal ionization mass spectrometry, luminescence analysis, and γ- and α-ray spectrometry. The main method of the study is isotope dilution followed by mass-spectrometric analysis. The data obtained will be used for developing of a low-waste and low-cost technology for preprocessing of highburn-up SNF and also for checking the accuracy of calculation of heavy actinide content in SNF and for improving computation methods and programs intended for calculation of the SNF nuclide composition in relation to the fuel burn-up in WWER-type reactors. The Nd and Cs isotopes were used as burn-up monitors. Content Type Journal Article Pages 379-382 DOI 10.1134/S106636221204011X Authors E. R. Petrov, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia B. A. Bibichev, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia V. D. Domkin, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia V. V. Kozharin, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia N. V. Kurenkov, Institute of Industrial Nuclear Technologies, Moscow Institute of Engineering Physics, National Research Nuclear University, Moscow, Russia V. S. Mukhin, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia Yu. A. Panteleev, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    A crystalline uranyl 2-methoxybenzoate, [C(NH 2 ) 3 ][UO 2 L 3 ]·H 2 O, was synthesized. Its structure was determined by single crystal X-ray diffraction, and the electronic and IR spectra were recorded. The coordination number of the U atom is 8, with methoxyl O atom not involved in coordination bonding with uranyl. The structure contains a system of hydrogen bonds with water molecule of crystallization and guanidinium cation acting as proton donors. The electronic absorption spectrum of the crystalline complex has a pronounced vibronic structure, whereas in the solution spectrum all the lines are strongly broadened. This may be due to dissociation of the complex anion in solution, which leads to superposition of several spectra. In the IR spectrum, there is a set of band characteristic of guanidinium cations. The uranyl group in [C(NH 2 ) 3 ][UO 2 L 3 ]·H 2 O has almost symmetrical structure. Therefore, only the band of its antisymmetric vibrations is observed in the IR spectrum. Content Type Journal Article Pages 335-340 DOI 10.1134/S1066362212040042 Authors A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia E. V. Gubanov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia M. S. Grigor’ev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. B. Yusov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    A procedure for preparing high-radiochemical-purity 125 I-salbutamol was developed in order to characterize the binding properties of β 2 -adrenoceptors. Direct radioiodination of salbutamol was carried out using Chloramine T as an oxidizing agent. The optimized conditions for salbutamol labeling with 125 I are as follows: 100 μg of salbutamol, 50 μg of Chloramine T, 150 μl of phosphate buffer (pH 7), room temperature (25 ± 1°C), 5 min. The radiochemical yield of up to 98% was attained. The radiochemical yield and purity of the labeled product were evaluated by electrophoresis and HPLC. Biodistribution studies were carried out in normal Albino Swiss mice at different time intervals after administration of 125 I-salbutamol. The results indicate that the labeled compound cleared from the systematic circulation within 3 h after administration and majority of organs showed significant decrease in the 125 I-salbutamol uptake. The heart and lung uptake was high. 125 I-Salbutamol can be used as β-receptor imaging agent. Content Type Journal Article Pages 401-406 DOI 10.1134/S1066362212040169 Authors M. El-Tawoosy, Labelled Compounds Department, Radioisotopes Production and Radioactive Sources Division, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt I. T. Ibrahim, Labelled Compounds Department, Radioisotopes Production and Radioactive Sources Division, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    The effect of the electrolyte composition and solvent salt cation on the oxygen coefficient of the cathode product (O/U atomic ratio) and on the main characteristics of potentiostatic electrolytic deposition of UO 2 (cathode current efficiency, current density, product deposition rate) in sequential recovery of uranium oxides from electrolytes of the system M 2 WO 4 -M 2 W 2 O 7 -UO 2 WO 4 (M = Li, Na, K, Cs) in air was examined. The dependence of the oxygen coefficient of the cathode product on the electrolyte composition and solvent salt cation does not differ essentially from that observed previously in short experiments with low melt depletion of U. The current efficiency, initial current density, and product deposition rate decrease with the electrolyte depletion of U. The results obtained are satisfactorily accounted for in terms of the model of ionic composition of uranyl-containing oxide salt electrolytes, based on the concept of complexation and stepwise solvolysis of uranyl ions, taking into account formation of lower valence forms of U due to chemical corrosion of the cathode product. Content Type Journal Article Pages 346-352 DOI 10.1134/S1066362212040066 Authors V. K. Afonichkin, Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi/Akademicheskaya 22/20, Yekaterinburg, 620990 Russia L. G. Khrustova, Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi/Akademicheskaya 22/20, Yekaterinburg, 620990 Russia V. E. Komarov, Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi/Akademicheskaya 22/20, Yekaterinburg, 620990 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    The extraction of microamounts of Sr(II) from aqueous solutions with solutions of bidentate neutral organophosphorus compounds is considerably enhanced in the presence of ionic liquids. The efficiency of the Sr(II) extraction varies in a wide range depending on the nature of the coordinating groups in the extractant molecule, substituents at the P and N atoms, and structure of the fragment linking the coordinating groups. Content Type Journal Article Pages 363-367 DOI 10.1134/S1066362212040091 Authors A. N. Turanov, Institute of Solid State Physics, Russian Academy of Sciences, Institutskaya ul. 2, Chernogolovka, Moscow oblast, 142432 Russia V. K. Karandashev, Institute of Technological Problems of Microelectronics and Ultrapure Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia V. E. Baulin, Institute of Physiologically Active Substances, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia A. N. Yarkevich, Institute of Physiologically Active Substances, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia S. V. Nosenko, Institute of Technological Problems of Microelectronics and Ultrapure Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    In EDTA solutions with pH ∼5 at 25°C, Am(V) in a concentration of 5 × 10 −4 −3 × 10 −3 M slowly transforms into Am(III). The Am(V) reduction and Am(III) accumulation follow the zero-order rate law. In the range 60–80°C, the reaction is faster. In some cases, an induction period is observed, disappearing in acetate buffer solutions. In the range pH 3–7, the rate somewhat increases with pH. In an acetate buffer solution, an increase in [EDTA] accelerates the process. The activation energy is 47 kJ mol −1 . Zero reaction order with respect to [Am(V)] is observed in solutions of ascorbic and tartaric acids, of Li 2 SO 3 (pH 〉 3), and of hydrazine. The process starts with the reaction of Am(V) with the reductant. The Am(III) ion formed in the reaction is in the excited state, *Am(III). On collision of *Am(III) with Am(V), the excitation is transferred to Am(V), and it reacts with the reductant: *Am(V) + reductant → Am(IV) + R 1 and then Am(IV) + reductant → *Am(III) + R 1 , Am(V) + R 1 → Am(IV) + R 2 . A branched chain reaction arises. The decay of radicals in side reactions keeps the system in the steady state; therefore, zero reaction order is observed. Content Type Journal Article Pages 330-334 DOI 10.1134/S1066362212040030 Authors A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia V. P. Shilov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia N. B. Nikolaevskii, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    Quinoxaline 1,4-dioxide derivative, 2-{[benzyl(cyanomethyl)amino]methyl}-3-(ethoxycarbonyl) quinoxaline 1,4-dioxide (Q 3 D), was synthesized and labeled with radioiodine via direct electrophilic substitution giving labeling yield above 90%. The product was examined by paper electrophoresis. 125 I-Q 3 D was prepared using Chloramine T as oxidizing agent. 125 I-Q 3 D was stable for up to 72 h post labeling, in contrast to 99 m Tc-AQCD which is stable only for a short time. Biodistribution study of 125 I-Q 3 D in ascites tumor bearing mice revealed large uptake of the labeled compound in tumor sites. In addition, in vitro incubation of the labeled compound with Ehrlich cells indicated incorporation of these compounds in DNA of tumor cells. This uptake of 125 I-Q 3 D in DNA of tumor cells may be helpful in tumor diagnosis and therapy. Content Type Journal Article Pages 395-400 DOI 10.1134/S1066362212040157 Authors I. T. Ibrahim, Labelled Compounds Department, Radioisotopes Production and Radioactive Sources Division, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt M. A. Waly, Chemistry Department, Faculty of Science (Damiatta), Mansoura University, Mansoura, Egypt M. El-Tawoosy, Labelled Compounds Department, Radioisotopes Production and Radioactive Sources Division, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    Published data on the effect of organic solvents on the hydrolysis of Np(IV) and redox reactions of Np(IV–VI) are analyzed. In aqueous-organic solutions, Np(IV) ions undergo hydrolysis at higher acidity than in aqueous solutions. With respect to the effect on hydrolysis, the solvents can be ranked in the order methanol 〉 ethanol 〉 dioxane 〉 acetone 〉 acetonitrile. Dimethyl sulfoxide suppresses the hydrolysis. The Np(V) disproportionation in CH 3 OH and CH 3 OH + C 6 H 6 solutions in the presence of HCl, HDEHP, or TTA and in a TBP solution was studied. The influence of the solution composition, including the H 2 O concentration, on the reaction kinetics was examined. The reactions occur faster than in aqueous solutions. The reaction mechanism is the same in all the media: Two solvated Np(V) ions form a complex decomposing upon protonation into Np(IV) and Np(VI). The role of the solvent in the Np(V) reproportionation was examined. In mixed water-ethylene glycol, water-methanol, and water-acetone solvents, with an increase in the fraction of the organic component, the Np(IV) + Np(VI) reaction rate passes through a maximum, which is due to combined effect of two factors: Np(IV) hydrolysis (acceleration) and decrease in [H 2 O] (deceleration). In TBP solutions, the Np(IV) + Np(VI) reaction decelerates in proportion to [HNO 3 ] −2 and [H 2 O]. The course of the Np(VI) + H 2 O 2 and Np(IV–VI) + HNO 2 reactions in TBP differs from that in aqueous solutions. Deceleration of the Np(VI) reduction and acceleration of the Np(V) oxidation, compared to aqueous solutions, are associated with a decrease in the formal potential of the Np(VI)/(V) couple in going from H 2 O to TBP. In solutions of KOH in aqueous methanol, Np(VI) rapidly disproportionates to Np(VII) and Np(V). A decrease in the H 2 O concentration shifts the equilibrium toward Np(VII). Content Type Journal Article Pages 315-323 DOI 10.1134/S1066362212040017 Authors V. P. Shilov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. V. Gogolev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    Complex benzoates [{UO 2 (C 10 N 2 H 8 )C 6 H 5 COO} 2 O 2 ], [NpO 2 (C 10 N 2 H 8 )(C 6 H 5 COO) 2 ], and [PuO 2 (C 10 N 2 H 8 )(C 6 H 5 COO) 2 ] (C 10 N 2 H 8 is 2,2′-bipyridine) were synthesized in the form of single crystals, and their structure was determined by X-ray diffraction analysis. The absorption spectra of the crystalline U(VI), Np(VI), and Pu(VI) complexes were measured and analyzed. Content Type Journal Article Pages 341-345 DOI 10.1134/S1066362212040054 Authors M. N. Sokolova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. A. Bessonov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    An L -carnitine derivative labeled with 99 m Tc was prepared. It is effective in tumor imaging. The labeling was done using SnCl 2 as a reducing agent. The optimum conditions required to label 25 μg of L -carnitine were as follows: 100 μg of SnCl 2 , 30 min reaction time, room temperature, pH 7 (0.5 M phosphate buffer). The radiochemical purity of the labeled compound was determined by paper chromatography. The yield was about 93%. About 2.5 × 10 6 Ehrlich ascites carcinoma (EAC) cells were injected intraperitoneally to produce ascites and intramuscularly in the right thigh to produce solid tumor in female mice. Biodistribution studies were carried out by injecting a solution of 99 m Tc- L -carnitine into normal and tumor-bearing mice. The uptake in ascites and in solid tumor was over 5% of the injected dose per gram tissue at 4 h post injection. These data revealed localization of the tracer in the tumor tissues with high percentage sufficient to use 99 m Tc- L -carnitine as a promising tool for diagnosis of tumor. Content Type Journal Article Pages 407-411 DOI 10.1134/S1066362212040170 Authors I. T. Ibrahim, Labelled Compounds Department, Radioisotopes Production and Radioactive Sources Division, Hot Laboratories Center, Atomic Energy Authority, P.O. Box 13759, Cairo, Egypt K. M. Attallah, Department of Pharmaceutics, Faculty of Pharmacy, Umm El-Qurah University, Makkah, Saudi Arabia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    The paper deals with the synthesis and physicochemical properties of sorbents based on coarsely dispersed silica gel, containing 1, 2, 4, and 8 wt % nanoparticles of Ag compounds, intended for localization of volatile radioactive iodine compounds from the water vapor-air medium. Content Type Journal Article Pages 368-378 DOI 10.1134/S1066362212040108 Authors S. A. Kulyukhin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia L. V. Mizina, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia E. V. Zanina, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia I. A. Rumer, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia N. A. Konovalova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia D. S. Levushkin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description: Erratum: “Hevesy Metal Awarded to Academician B.F. Myasoedov” Content Type Journal Article Category Erratum Pages 417-417 DOI 10.1134/S1066362212040194 Authors B. F. Myasoedov Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    The effect of the acid treatment on the adsorption capacity of aluminum oxides for Mo was examined. The areas of the initial (ν o ) and limiting (ν lim ) saturation of neutral and acidic aluminum oxides with hydrochloric acid were determined. The Mo adsorption maximum is attained at the limiting saturation, with the subsequent exponential decrease on approaching the point in which the interaction of the oxide with the acid starts to decelerate, after which the adsorption drastically decreases. In the area close to ν o , the Mo breakthrough to the eluate is observed at any adsorbed amount of Mo. The results obtained allow prediction of the acid amount required for the adsorption of the preset amount of Mo. Content Type Journal Article Pages 391-394 DOI 10.1134/S1066362212040145 Authors V. S. Skuridin, Physicotechnical Institute, National Research Tomsk Polytechnic University, State Educational Institution of Higher Professional Education, pr. Lenina 2a, Tomsk, 634028 Russia E. S. Stasyuk, Physicotechnical Institute, National Research Tomsk Polytechnic University, State Educational Institution of Higher Professional Education, pr. Lenina 2a, Tomsk, 634028 Russia E. A. Nesterov, Physicotechnical Institute, National Research Tomsk Polytechnic University, State Educational Institution of Higher Professional Education, pr. Lenina 2a, Tomsk, 634028 Russia V. L. Sadkin, Physicotechnical Institute, National Research Tomsk Polytechnic University, State Educational Institution of Higher Professional Education, pr. Lenina 2a, Tomsk, 634028 Russia A. S. Rogov, Physicotechnical Institute, National Research Tomsk Polytechnic University, State Educational Institution of Higher Professional Education, pr. Lenina 2a, Tomsk, 634028 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    A procedure is described for isolating 90 Y from its equilibrium mixture with 90 Sr. It is based on extraction-chromatographic separation of 90 Sr and 90 Y on columns packed with a solid extractant based on di-2-ethylhexyl hydrogen phosphate. Further purification of 90 Y is made by its sorption on a column with an yttrium-specific sorbent based on octyl(phenyl)- N,N -diisobutylcarbamoylmethylphosphine oxide in TBP, and then on a cation-exchange resin. The whole process is performed in a nitric acid solution, which, in contrast to hydrochloric acid solutions, does not cause strong corrosion of stainless steel equipment, thus facilitating decontamination of the final product from inactive impurity cations. Content Type Journal Article Pages 388-390 DOI 10.1134/S1066362212040133 Authors V. V. Shapovalov, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia N. A. Mel’nichenko, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia N. A. Nerozin, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia S. V. Tkachev, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia N. R. Togaeva, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia S. V. Kham’yanov, Leipunskii Institute of Energy Physics, State Scientific Center of the Russian Federation, Federal State Unitary Enterprise, pl. Bondarenko 1, Obninsk, Kaluga oblast, 249033 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    Decontamination of TV-56 grade Be irradiated in an SM reactor to a neutron fluence of 6 × 10 22 cm −2 ( E 〉 0.1 MeV) from radioactive impurities by precipitation of its hydroxide with ammonia in the presence of a complexone, diethylenetriaminepentaacetic acid (DTPA), was studied. The decontamination procedure involved dissolution in hydrochloric acid, addition of the complexone, precipitation of beryllium hydroxide with ammonia, separation of the hydroxide from solution, and washing of the hydroxide precipitate. The radioactivity of the solutions obtained after each decontamination step was determined. Content Type Journal Article Pages 358-362 DOI 10.1134/S106636221204008X Authors B. I. Levakov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia A. O. Posevin, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia A. S. Pokrovskii, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia M. N. Svyatkin, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia A. B. Kharlov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia N. F. Demchenko, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    Conditions of baddeleyite dissolution were examined, and an optimal method of its complete breakdown was found. A solution of 229 Th tracer was prepared and used for radiochemical isolation of Th from baddeleyite. Radiochemical methds were developed for recovering the uranium and thorium fractions from a baddeleyite solution. The total chemical yield of U and Th was 71 ± 5 and 89 ± 7%, respectively. Content Type Journal Article Pages 353-357 DOI 10.1134/S1066362212040078 Authors I. V. Kolchin, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia A. D. Gedeonov, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, St. Petersburg, Russia Yu. G. Vlasov, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia A. K. Avenirov, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    The resistance of polymeric matrices to leaching of tritium water incorporated in oil microcapsules or in chemisorbent particles was studied. The phenol-formaldehyde matrix with tritium and cesium in oil microcapsules ensures highly reliable radionuclide immobilization: The half-decile leaching rate, g cm −2 day −1 , is 9 × 10 −5 for 3 H and 2 × 10 −5 for 137 Cs. A borate chemisorbent in combination with a polyurethane matrix was suggested for immobilization of highly radioactive tritium water vapor. Content Type Journal Article Pages 412-416 DOI 10.1134/S1066362212040182 Authors A. G. Mikhal’chenko, St. Petersburg State Institute of Technology (Technical University), Moskovskii pr. 26, St. Petersburg, 190013 Russia V. A. Starchenko, Deimos LTD Designing, Production, and Promotion Enterprise, Limited Liability Company, St. Petersburg, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    A target containing 3.16 mg of 226 RaCO 3 was irradiated in the neutron trap of the SM reactor for 25 effective days at a thermal neutron flux of 1.5 × 10 15 cm −2 s −1 . After the irradiation and storage for 17 days, the irradiated material was dissolved and the Ra activation products were chemically isolated. The yields of 229 Th, 230 Th, 227 Ac, and 228 Th were determined by α- and γ-ray spectroscopy and by mass spectrometry. Formation of significant amounts of 228 Ra, not predicted by the calculations, was revealed. It was suggested that the short-lived isotope 227 Ra has a high neutron capture cross section [σ eff ( 227 Ra) ≈ 1.5 × 10 3 b]. Content Type Journal Article Pages 383-387 DOI 10.1134/S1066362212040121 Authors R. A. Kuznetsov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia P. S. Butkalyuk, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia V. A. Tarasov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia A. Yu. Baranov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia I. L. Butkalyuk, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia E. G. Romanov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia V. N. Kupriyanov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia E. V. Kazakova, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, 433510 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    Bubbling of an ozone-oxygen mixture containing 0.1–0.5 vol % O 3 at a rate of 15–20 l h −1 through 13 ml of a 2 × 10 −5 −1 × 10 −4 M solution of Np(VI) in 0.1 and 1 M LiOH leads to the formation of Np(VII). The initial rate increases approximately in proportion to [Np(VI)] and [O 3 gas ] 0.5 . Up to 80% of Np(VI) is oxidized at maximum. At the O 3 concentration in the gas phase increased to 1–4 vol %, Np(VI) is oxidized completely. Under the same conditions, Np(VI) in a concentration of (1–5) × 10 −3 M is oxidized to almost 100%. Analysis of published data and additional experiments on the reaction of O 3 with Np(VI) ions in LiOH solutions allow a conclusion that the ozonation involves the reactions O 3 + OH − = HO 2 − + O 2 , O 3 + HO 2 − + OH − = O 3 − + O 2 − + H 2 O, and O 3 + O 2 − = O 3 − + O 2 , followed by O 3 − + NpO 2 (OH) 4 2− = O 2 + NpO 4 (OH) 2 3− + H 2 O. In addition, HO 2 − reduces Np(VII) and Np(VI) and reacts with O 3 − . Certain contribution is made by the reaction Np(VI) + O 3 = Np(VII) + O 3 − . The dependence of the Np(VII) accumulation rate on [O 3 gas ] 0.5 was interpreted in terms of the concept of a heterogeneous-catalytic process. Content Type Journal Article Pages 324-329 DOI 10.1134/S1066362212040029 Authors V. P. Shilov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia B. G. Ershov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 4

Description:    Sorption of transplutonium (TPE) and rare-earth (REE) elements on Purolite®S-957 ion exchanger containing phosphonic acid and sulfo groups was studied. Rare-earth elements are efficiently sorbed from weakly acidic solutions (≤0.1 M HNO 3 ). An increase in the solution acidity and introduction of sodium ions into the sorption medium lead to a decrease in the sorption. With S-957 resin, REE and TPE were separated for the first time on a phosphorus-containing sorbent by displacement chromatography in the presence of DTPA (diethylenetriaminepentaacetic acid). Content Type Journal Article Pages 164-167 DOI 10.1134/S1066362212020129 Authors Yu. B. Shumilova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia V. M. Gelis, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia V. V. Milyutin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia O. V. Kharitonov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia L. A. Firsova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The kinetics of carbohydrazide oxidation with nitric acid in aqueous solutions was studied. In the range [HNO 3 ] = 3–7 M, the reaction rate is described by the equation −d[(NH 2 NH) 2 CO]/d t = k [(NH 2 NH) 2 CO][HNO 3 ] n , where n = 3.6 and 2.9 at 70 and 90°C, respectively. The constant k = (6.65 ± 0.23) × 10 −4 l 2.9 mol −2.9 h −1 at 90°C, and the activation energy of the reaction in 7 M HNO 3 is 124 kJ mol −1 . The Fe(III) and especially Tc(VII) ions considerably accelerate the reaction, whereas the uranyl ions accelerate it insignificantly. The reaction mechanism in which the reactive species oxidizing carbohydrazide is nitronium ion NO 2 + was suggested. Content Type Journal Article Pages 149-152 DOI 10.1134/S1066362212020099 Authors V. N. Alekseenko, Mining and Chemical Combine, Federal State Unitary Enterprise, Zheleznogorsk, Krasnoyarsk krai, Russia V. I. Volk, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia V. I. Marchenko, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia K. N. Dvoeglazov, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia S. I. Bychkov, Mining and Chemical Combine, Federal State Unitary Enterprise, Zheleznogorsk, Krasnoyarsk krai, Russia V. V. Bondin, Mining and Chemical Combine, Federal State Unitary Enterprise, Zheleznogorsk, Krasnoyarsk krai, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    A cycle of studies resulted in the development of a simple technology for preparing 57 Co Mössbauer sources in a chromium matrix. X-ray diffraction studies and SEM examination of the surface morphology of specimens with different chemical histories (slides of 99.98% electrolytic Cr; thin films prepared by cold rolling; films of Cr metal on BeO supports, prepared by magnetron sputtering) showed that only electrolytic chromium specimens can serve as matrices for Mössbauer sources, because they have not only undistorted bcc structure, but also sufficiently even and smooth surface. The parameters of the 57 Co diffusion in Cr were determined. They fully agree with the known experimental data on migration of transition elements in this metal. Experimental 57 Co(Cr) Mössbauer sources were prepared. The yield of the Mössbauer radiation from their face surface is no less than 90% of the theoretically possible yield. The magnitudes of the effects and the experimental line widths were determined using a set of α-Fe reference absorbers. These parameters confirmed the high quality of the sources. Content Type Journal Article Pages 180-187 DOI 10.1134/S1066362212020154 Authors I. E. Alekseev, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The formal oxidation potentials E f 0 of the Np(VI)-Np(V) couple in 1–3 M HNO 3 solutions containing (1–3) × 10 −3 M potassium phosphotungstate K 10 P 2 W 17 O 61 (KPW) were measured by the potentiometric method with spectrophotometric identification of the valence states. The potentials slightly decrease with an increase in the HNO 3 and KPW concentrations, and the shift of the Np(VI)-Np(V) potential toward negative values relative to its value in 1 M HClO 4 reaches 0.08 V. The formal oxidation potentials of the Np(V)-Np(IV) couple were calculated from the experimentally determined equilibrium constants ( K eq ) of the redox reaction of the Np(V) disproportionation. Under the examined conditions, these potentials also vary insignificantly, and the shift of E f 0 toward positive values relative to its value in 1 M HClO 4 is 0.53 V. The schemes of potentials of the Np and Am couples in 1 M HNO 3 in the presence of KPW are suggested. Content Type Journal Article Pages 140-142 DOI 10.1134/S1066362212020075 Authors A. A. Baranov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, Russia E. A. Erin, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, Russia L. V. Nagaitseva, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, Russia V. M. Chistyakov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The extraction of Au(III) from an aqueous acidic medium with N -(thioacetyl)benzamide in chloroform was studied in the presence of organophosphorus donors (tributylphosphine oxide, triphenylphosphine oxide, tributyl phosphate) at pH 3.0 using radiotracer technique. The influence of various parameters on the extraction equilibrium was examined. The extent of extraction of Au(III) in the form of the binary complex increases with temperature, but the reverse trend is observed with the ternary complex. The overall equilibrium constants for each of the three ternary extraction systems were estimated, and the role of different thermodynamic functions is discussed. The extraction mechanism is supported by the IR spectra of the ternary adduct. Content Type Journal Article Pages 153-158 DOI 10.1134/S1066362212020105 Authors P. Dey, Department of Chemistry, University of Burdwan, Burdwan, 713104 India S. Banerjee, Department of Chemistry, Raja Rammohon Roy Mahavidyalaya, Radhanagore, Hooghly, 712406 India S. Basu, Department of Chemistry, University of Burdwan, Burdwan, 713104 India Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The complexation of U(VI), Np(VI), and Pu(VI) and of Np(V) with 1,2,3- and 1,2,4-benzenetricarboxylic acids (BTC) in aqueous solutions was studied in wide ranges of pH and actinyl ion concentrations. The compositions of the forming hexavalent actinide complexes were determined. Their apparent stability constants β 1 ′ depend on pH of the solution: in the pH range 2–4, logβ 1 ′ from 2 to 4 for the complexes of U(VI), Np(VI), and Pu(VI) with 1,2,3-BTC and from 1.5 to 3.5 for the complexes with 1,2,4-BTC. For Np(V), the β 1 ′ values are close with both acids, and at equal pH values the Np(V) complexes are less stable than the An(VI) complexes (An = U, Np, Pu). With an increase in pH from ∼3 to 6.2–6.9, logβ 1 ′ of the Np(V) complexes increases approximately from 0.5 to 3. Solid U(VI) complexes with 1,2,3- and 1,2,4-benzenetricarboxylic acids were synthesized by the hydrothermal method, their crystal structure was determined, and the IR spectra were examined. Content Type Journal Article Pages 105-114 DOI 10.1134/S1066362212020014 Authors A. B. Yusov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia M. N. Sokolova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia M. S. Grigor’ev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia N. A. Budantseva, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia P. Moisy, CEA Marcoule, DRCP/SCPS, BP 17171, 30207 Bagnols sur Cèze Cedex, France Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The behavior of Np(VI) in HNO 3 solutions containing potassium phosphotungstate K 10 P 2 W 17 O 61 (KPW) at various concentrations of HNO 3 (1–3 M) and KPW [(1–3) × 10 −3 M] was studied by spectrophotometry. The rate law and the Np(VI) transformation scheme were determined, and the effective rate constants of the Np(VI) reduction and Np(V) reproportionation were calculated. Content Type Journal Article Pages 137-139 DOI 10.1134/S1066362212020063 Authors A. A. Baranov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, Russia E. A. Erin, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, Russia L. V. Nagaitseva, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, Russia V. M. Chistyakov, Research Institute of Atomic Reactors, State Scientific Center, Public Joint-Stock Company, Dimitrovgrad-10, Ulyanovsk oblast, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    An electrolytic method for preparing chemically resistant Pm-Ni alloys was developed. Optimal electrolysis conditions ensuring maximal Pm recovery from the electrolyte (up to 95%) with the alloy formation were determined. Side steps of the process were examined. The main of them is reduction of Pm in the bulk of the electrolyte with alkali metal subions. Content Type Journal Article Pages 132-136 DOI 10.1134/S1066362212020051 Authors V. V. Ivanov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia I. B. Popov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    Redox potentiometric titration of small amounts of U in mixed phosphoric-sulfuric acid systems with an automatic titrator was studied. The U determination accuracy is strongly affected by the aqueous phase composition and kind of titrant. In determination of 0.1–0.2 mg of U in mixed phosphoric-sulfuric acid solutions containing 6 M H 3 PO 4 and 1.25 M H 2 SO 4 , the titrant efficiency decreases in the order NH 4 VO 3 〉 KMnO 4 〉 Ce(SO 4 ) 2 〉 K 2 Cr 2 O 7 . In 2 M H 2 SO 4 , the use of KMnO 4 as titrant allows determination of 0.02–0.1 mg of U with the uncertainty within 10%. Content Type Journal Article Pages 174-179 DOI 10.1134/S1066362212020142 Authors V. V. Yakshin, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia M. N. Krokhin, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    Technological aspects of 99 Mo production from 235 U at the VVR-ts nuclear reactor are considered. The nuclear target design with which the formation of liquid and solid wastes is reduced to a minimum and the forced system for cooling of nuclear targets in experimental channels of the nuclear reactor are reported. Schemes of 99 Mo isolation from 235 U fission products and of 235 U regeneration after 99 Mo isolation are described. The 99 Mo and, correspondingly, 99 m Tc produced from the regenerated 235 U fully meet the technical specification and pharmacopoeial monograph for sodium pertechnetate. Content Type Journal Article Pages 188-192 DOI 10.1134/S1066362212020166 Authors O. Yu. Kochnov, Branch of Karpov Research Physicochemical Institute, Federal State Unitary Enterprise, Kievskoe shosse, 109 km, Obninsk, Kaluga oblast, 249033 Russia V. V. Pozdeev, Branch of Karpov Research Physicochemical Institute, Federal State Unitary Enterprise, Kievskoe shosse, 109 km, Obninsk, Kaluga oblast, 249033 Russia A. I. Krasheninnikov, Branch of Karpov Research Physicochemical Institute, Federal State Unitary Enterprise, Kievskoe shosse, 109 km, Obninsk, Kaluga oblast, 249033 Russia N. V. Zakharov, Branch of Karpov Research Physicochemical Institute, Federal State Unitary Enterprise, Kievskoe shosse, 109 km, Obninsk, Kaluga oblast, 249033 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    Interaction of uranium with low-molecular-weight sulfosuccinyl chitosan (SSLMWC) from sulfate solutions was studied by X-ray photoelectron spectroscopy. The interaction involves formation of complexes with the uranyl group on the SSLMWC surface. The equatorial plane of these complexes can contain nitrogen atom of the amino group and oxygen atoms of the sulfato and sulfo groups SO 4 2− and -SO 3 H, carboxy groups, and free hydroxy groups. On keeping the complex in a vacuum, two chemically nonequivalent states of U ions, U 4+ and UO 2 2+ , are observed. The U 4+ formation in solid U-containing samples of chitosan and SSLMWC is attributed to the radical reaction of the UO 2 2+ reduction with the primary hydroxy group of chitosan in a vacuum of the spectrometer under the action of X-ray radiation. Content Type Journal Article Pages 122-127 DOI 10.1134/S1066362212020038 Authors I. E. Veleshko, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia A. N. Veleshko, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia A. Yu. Teterin, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia K. I. Maslakov, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia Yu. A. Teterin, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia K. E. Ivanov, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia E. V. Rumyantseva, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia A. N. Levov, Bioinzheneriya Center, Russian Academy of Sciences, Moscow, Russia V. P. Varlamov, Bioinzheneriya Center, Russian Academy of Sciences, Moscow, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    Analysis of the core material taken by check drilling of a monolith of cemented radioactive waste in near-surface repositories operated for 15–45 years revealed the presence of damaged areas in the cement matrix. An association of microorganisms capable to cause degradation of silicate materials was found in cement compounds with radioactive waste. The bacterial genera, the metabolite concentrations, and the character of the biogenic acid damage of the cement matrix were determined. It was concluded that the safety level of the longterm storage of conditioned radioactive waste forms can decrease because of disturbances of the immobilization properties of the cement matrix as a result of biogenic damage of its microstructure. Biocidal additives were suggested for preventing degradation processes in the modern stages of radioactive waste cementation. Content Type Journal Article Pages 198-204 DOI 10.1134/S106636221202018X Authors O. A. Gorbunova, Joint Environmental, Technological, and Research Center for Radioactive Waste Management and Environment Protection—Radon Moscow Research and Production Association, State Unitary Enterprise, Sergiev Posad, Moscow oblast, 141335 Russia A. S. Barinov, Joint Environmental, Technological, and Research Center for Radioactive Waste Management and Environment Protection—Radon Moscow Research and Production Association, State Unitary Enterprise, Sergiev Posad, Moscow oblast, 141335 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    Oxidized bottom residue (BR) from installations for reprocessing trap waters of the Leningrad NPP were treated to remove 60 Co by coprecipitation with transition metal diethyldithiocarbamates (DDTC). Coprecipitation of 60 Co with manganese and cobalt diethyldithiocarbamates was examined in relation to pH of solution, temperature, amount of diethyldithiocarbamates, reagent ratio, and number of coprecipitation steps. The effect of diethyldithiocarbamates on the efficiency and conditions of the solution decontamination from 134,137 Cs on nickel potassium ferrocyanides was studied. Oxidative treatment of liquid radioactive waste concentrates to break down organic complexes is a necessary condition for 60 Co removal by coprecipitation with transition metal diethyldithiocarbamates. From a solution initially containing 56 kBq dm −3 60 Co, 60 Co can be removed to a residual content of 0.12–0.16 kBq dm −3 by two-step coprecipitation with Co(DDTC) 2 . The coprecipitation with Co(DDTC) 2 does not affect the efficiency of the subsequent removal of Cs radionuclides on nickel potassium ferrocyanides. Content Type Journal Article Pages 168-173 DOI 10.1134/S1066362212020130 Authors V. I. Cheremiskin, Leningrad Nuclear Power Plant, Branch of Rosenergoatom Concern, Public Joint-Stock Company, Sosnovyi Bor, Leningrad oblast, 188540 Russia L. V. Shmakov, Leningrad Nuclear Power Plant, Branch of Rosenergoatom Concern, Public Joint-Stock Company, Sosnovyi Bor, Leningrad oblast, 188540 Russia V. I. Pereguda, Leningrad Nuclear Power Plant, Branch of Rosenergoatom Concern, Public Joint-Stock Company, Sosnovyi Bor, Leningrad oblast, 188540 Russia V. M. Tishkov, Leningrad Nuclear Power Plant, Branch of Rosenergoatom Concern, Public Joint-Stock Company, Sosnovyi Bor, Leningrad oblast, 188540 Russia A. V. Chernikin, Leningrad Nuclear Power Plant, Branch of Rosenergoatom Concern, Public Joint-Stock Company, Sosnovyi Bor, Leningrad oblast, 188540 Russia S. V. Cheremiskin, Leningrad Nuclear Power Plant, Branch of Rosenergoatom Concern, Public Joint-Stock Company, Sosnovyi Bor, Leningrad oblast, 188540 Russia A. G. Chaliyan, Eksimer Engineering Center, Private Joint-Stock Company, ul. Radishcheva 39, St. Petersburg, 191013 Russia V. A. Novolodskii, Eksimer Engineering Center, Private Joint-Stock Company, ul. Radishcheva 39, St. Petersburg, 191013 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The reduction of Pu(IV) and Np(VI) with carbohydrazide (NH 2 NH) 2 CO in 1–6 M HNO 3 solutions was studied. The Pu(IV) reduction is described by a first-order rate equation with respect to Pu(IV). At [HNO 3 ] ≥ 3 M, the reaction becomes reversible. The rate constants of the forward and reverse reactions were determined, and their activation energies were estimated. Neptunium(VI) is reduced to Np(V) at a high rate, whereas the subsequent reduction of Np(V) to Np(IV) is considerably slower and is catalyzed by Fe and Tc ions. The possibility of using carbohydrazide for stabilizing desired combinations of Pu and Np valence states was examined. Content Type Journal Article Pages 143-148 DOI 10.1134/S1066362212020087 Authors V. I. Volk, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia V. I. Marchenko, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia K. N. Dvoeglazov, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia V. N. Alekseenko, Mining and Chemical Combine, Federal State Unitary Enterprise, Zheleznogorsk, Krasnoyarsk krai, Russia S. I. Bychkov, Mining and Chemical Combine, Federal State Unitary Enterprise, Zheleznogorsk, Krasnoyarsk krai, Russia E. Yu. Pavlyukevich, Bochvar High-Tech Institute of Inorganic Materials, Public Joint-Stock Company, ul. Rogova 5a, Moscow, 123060 Russia V. V. Bondin, Mining and Chemical Combine, Federal State Unitary Enterprise, Zheleznogorsk, Krasnoyarsk krai, Russia A. S. D’yachenko, Mining and Chemical Combine, Federal State Unitary Enterprise, Zheleznogorsk, Krasnoyarsk krai, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    Regional differences in the 90 Sr transfer from catchment areas to rivers of the European Russian North and Eastern Siberia and in the rates of natural water clearance were revealed. The annual 90 Sr transfer was 0.5–0.6 and 0.2–0.3%, respectively, of the total inventory in the catchment area. The half-times T of natural decontamination of Onega, Northern Dvina, Pechora, Lena, and Indigirka from global 90 Sr are estimated at 15.0, 15.4, 13.9, 10.0, and 7.5 years, respectively. Content Type Journal Article Pages 205-210 DOI 10.1134/S1066362212020191 Authors N. A. Bakunov, Arctic and Antarctic Research Institute, State Institution of the Russian Federation, ul. Beringa 38, St. Petersburg, 199397 Russia D. Yu. Bol’shiyanov, Arctic and Antarctic Research Institute, State Institution of the Russian Federation, ul. Beringa 38, St. Petersburg, 199397 Russia A. S. Makarov, Arctic and Antarctic Research Institute, State Institution of the Russian Federation, ul. Beringa 38, St. Petersburg, 199397 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The structure of X-ray photoelectron spectra of actinide-containing (An = Th, U, Np, and Pu) murataite ceramic (Ti-Mn-Ca-An-Zr-Al-Fe-O) samples as potential matrices for immobilization of actinide radioactive waste was studied. The elemental composition of the sample surface was analyzed, and comparison with the calculated data for the bulk of the samples was made. The binding energies of the An4 f electrons and the parameters of the fine structure of their X-ray photoelectron spectra were determined. These parameters were compared with the corresponding values for the dioxides. Content Type Journal Article Pages 115-121 DOI 10.1134/S1066362212020026 Authors K. I. Maslakov, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia A. Yu. Teterin, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia Yu. A. Teterin, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia K. E. Ivanov, National Research Center Kurchatov Institute, pl. Akad. Kurchatova 1, Moscow, 123182 Russia S. V. Yudintsev, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017 Russia S. V. Stefanovskii, Joint Ecological, Technological, and Research Center for Radioactive Waste Management and Environment Protection—Radon Moscow Research and Production Association, Federal State Unitary Enterprise, 7-i Rostovskii per. 2/14, Moscow, 119121 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    A procedure was suggested for the synthesis of Np(VII) compounds by electrochemical oxidation in acetate solutions. The conditions for preparing compounds of type MNpO 4 · n H 2 O, where M is a single-charged cation of alkali metals, ammonium, silver, guanidinium, or tetraalkylammonium, and of Np(VII) compounds with double-charged cations of alkaline-earth metals, Cu, Cd, and Zn were studied in detail. The compounds were characterized by chemical analysis and by IR and electronic spectroscopy. Content Type Journal Article Pages 128-131 DOI 10.1134/S106636221202004X Authors A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia N. A. Budantseva, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia A. A. Bessonov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia V. P. Shilov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The sorption properties of solid-phase extractants (SPEs) prepared by impregnation of Taunit carbon nanotubes with adducts of diphenyl(dibutylcarbamoylmethyl)phosphine oxide (CMPO) and tri- n -octylphosphine oxide (TOPO) in HNO 3 solutions were studied. The SPEs exhibit high ability to sorb U(VI), Pu(IV), Np(V), Am(III), and Eu(III) from nitric acid solutions, with good kinetic properties. The impregnation conditions and distribution coefficients of the radionuclides in their recovery from 3 M HNO 3 were determined. The possibility of preparing SPEs by Taunit impregnation in HNO 3 solutions with adducts of tributyl phosphate (TBP) and N,N ′-dimethyl- N,N ′-dioctylhexylethoxymalonamide (DMDOHEMA) and with Cyphos IL-101 phosphonium ionic liquid was demonstrated. Content Type Journal Article Pages 159-163 DOI 10.1134/S1066362212020117 Authors E. A. Zakharchenko, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia D. A. Malikov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia G. V. Myasoedova, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia O. B. Mokhodoeva, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia N. P. Molochnikova, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia Yu. M. Kulyako, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    The effect of thermal annealing on the resistance of borosilicate systems to crystallization and the effect of this process on the hydrolytic stability of the materials were examined. The systems containing REE + TUE and Cs + Sr fractions were studied. For borobasalt matrices containing the REE + TUE fraction, annealing in the temperature rangte 400–600°C leads to an appreciable decrease in the leach rate in water. For the borobasalt system containing waste components of the Cs + Sr fraction, changes in the leach rate upon thermal annealing are not clearly observed up to the annealing temperature of 600°C. Content Type Journal Article Pages 193-197 DOI 10.1134/S1066362212020178 Authors D. G. Kuznetsov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia V. V. Ivanov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia I. B. Popov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia B. G. Ershov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 54 Journal Issue Volume 54, Number 2

Description:    Experiments aimed to examine the spent nuclear fuel dissolution in iron(III) nitrate solutions and to elucidate the behavior of fission products in the process were performed with simulated fuel corresponding to spent nuclear fuel of a WWER-1000 reactor. In Fe(III) nitrate solutions, U is quantitatively transferred from the fuel together with Cs, Sr, Ba, Y, La, and Ce, whereas Mo, Tc, and Ru remain in the insoluble precipitate and do not pass into the solution, and Nd, Zr, and Pd pass into the solution to approximately 50%. The recovery of U or jointly U + Pu from the solution after the dissolution of oxide nuclear fuel is performed by precipitation of their peroxides, which allows efficient separation of actinides from residues of fission products and iron. Content Type Journal Article Pages 608-611 DOI 10.1134/S1066362211060075 Authors Yu. M. Kulyako, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia S. A. Perevalov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia T. I. Trofimov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia D. A. Malikov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia M. D. Samsonov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia S. E. Vinokurov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia B. F. Myasoedov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    Possibilities of reagent decontamination of sandy soils contaminated with 137 Cs are considered. Treatment with a 2 M H 2 SO 4 solution for 7 h at 80°C and liquid-to-solid ratio (L : S) of 2 : 1 results not only in complete recovery of the finely dispersed fraction but also in additional leaching of 137 Cs from particles of sandy size, with the decontamination factor reaching ∼60–70. The reagent treatment is the most efficient at L : S from 3 : 1 to 4 : 1 after preliminary separation of finely dispersed particles by sedimentation in water. Content Type Journal Article Pages 443-448 DOI 10.1134/S1066362211040199 Authors S. A. Dmitriev, Joint Environmental, Engineering, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association, Federal Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia A. S. Barinov, Joint Environmental, Engineering, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association, Federal Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia V. M. Kuptsov, Joint Environmental, Engineering, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association, Federal Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    Novel extraction systems based on neutral [diphenyl- N , N -dibutylcarbamoylmethylphosphine oxide (CMPO), polyethylene glycol (PEG)] and cation-exchange [zirconium and hafnium salts of dibutyl hydrogen phosphate, chlorinated cobalt dicarbollilde (CCD)] extractants in a polar diluent and an aqueous solution of a complexone and HNO 3 were developed for decontamination of solutions from the major amount of long-lived fission products ( 137 Cs, 90 Sr, 90 Y, 152,154 Eu) and actinides, including transplutonium elements ( 241 Am, 244 Cm). Stable and weakly radioactive fission and corrosion products (Zr, Mo, Mg, Pd, Ru, Rh, Si, Sb, Na, Fe, Cr, etc.) after such treatment remain in the solution and can be determined simultaneously by inductively coupled plasma atomic emission spectrometry and mass spectrometry. For example, in three extraction-washing operations, with a mixture of 0.005 M CCD with additions of PEG and CMPO in an o -chloronitrobenzene-CCl4 mixture as extractant and a solution of 0.05 M HNO 3 and 1 g l −1 H 2 C 2 O 4 as aqueous washing solution, the radioactivity of the tested aqueous solution decreased by more than 6 orders of magnitude. In the process, the loss of the elements being analyzed with the extractant does not exceed 5%. Content Type Journal Article Pages 494-497 DOI 10.1134/S1066362211050080 Authors D. N. Shishkin, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia N. K. Petrova, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    The solubility of UF 4 , ThF 4 , and CeF 3 in fluoride melt of the composition 45 mol % LiF-12 mol % NaF-43 mol % KF in the temperature interval 773–973 K was determined. The solubility of the fluorides increases with an increase in the melt temperature. The CeF 3 solubility in the LiF-NaF-KF system is high: 19.9 mol % at 923 K and 23.3 mol % at 973 K. Experimental data on the solubility of CeF 3 (PuF 3 imitator) were compared to the calculated data on the PuF 3 solubility in the LiF-NaF-KF melt. The results showed that CeF3 can be considered as PuF3 imitator in FLINAK melt. Content Type Journal Article Pages 491-493 DOI 10.1134/S1066362211050079 Authors M. B. Seregin, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia A. P. Parshin, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia A. Yu. Kuznetsov, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia L. I. Ponomarev, ANO KITs MYuKATEKS, Moscow, Russia S. A. Mel’nikov, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia A. A. Mikhalichenko, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia A. A. Rzheutskii, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia R. N. Manuilov, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    N -(4-(2-Azanorborn-2-yl)butyl)-4-[ 125 I]iodobenzamide was prepared by the reaction of its trimethylstannyl precursor with Na 125 I in the presence of various oxidizing agents such as lactoperoxidase, Chloramine T, and Iodogen. The effect of reaction parameters such as temperature, reaction time, oxidizing agent concentration, pH, and substrate concentration was examined. The stability of the labeled product was evaluated. Chromatographic analysis of the reaction mixture by TLC using ethanol: ethyl acetate (1: 1) and by HPLC using methanol: water (55: 45) as eluent showed that the optimum radiochemical yield of the final product is 94% and the radiochemical purity is 99%. Also HPLC chromatographic analysis showed that the content of undesired by-products, especially of chlorinated products, in case of Chloramine T was higher than that in case of other oxidizing agents. With the lactoperoxidase method, the amount of undesired by-products was minimal and, therefore, the radiochemical purity was high. Content Type Journal Article Pages 545-549 DOI 10.1134/S1066362211050171 Authors N. Farouk, Labeled Compounds Department, Radioisotope Production Division, Hot Laboratories Centre, Atomic Energy Authority, P.O. 13759, Cairo, Egypt I. Taha, Labeled Compounds Department, Radioisotope Production Division, Hot Laboratories Centre, Atomic Energy Authority, P.O. 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    The behavior of aerosols formed over boiling melts of substances (boiling temperature 500–1800 K) in a stream of a carrier gas at 300 K was studied. Microparticles of size from 0.2 to 10 μm, partially aggregated, were detected in the aerosol. In an applied electric field with an intensity of 150–1000 V cm −1 , the particles migrated toward the negatively charged electrode at a velocity of 5–15 cm s −1 . The velocity of their motion was a linear function of the field intensity and depended on the melt boiling temperature in accordance with the Arrhenius equation. Experimental data were interpreted on the basis of a concept that, in the course of the growth of each microparticle, vapor molecules adsorbed by it decompose into ions with nonequivalent transfer of cations and anions into the particle volume, i.e., the microparticles undergo growth charging at the activation energy of the cation release from the particle surface into vapor of approximately 0.5 eV. Content Type Journal Article Pages 516-522 DOI 10.1134/S1066362211050122 Authors I. V. Melikhov, Chemical Faculty, Lomonosov Moscow State University, Moscow, Russia N. B. Mikheev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia V. A. Lavrikov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia V. V. Kulemin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia A. N. Kamenskaya, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia S. A. Kulyukhin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    The stability of uranophosphates M II (PUO 6 ) 2 · n H 2 O (M II = Mg, Ca, Sr, Ba) in aqueous solutions at pH from 0 to 14 was studied. These compounds preserve their composition and structure in the interval of pH 1–11 and congruently pass into the solution within the limits of their solubility. In strongly acidic media (pH 〈 1), alkaline-earth metal uranophosphates transform into uranophosphoric acid HPUO 6 ·4H 2 O. In alkaline solutions at pH 〉 11, the uranophosphates MII(PUO 6 ) 2 · n H 2 O irreversibly transform into diuranates. Using the methods of equilibrium thermodynamics, the solubility products and Gibbs functions of formation of alkalineearth metal uranophosphates were calculated, the solubility curves were calculated and experimentally confirmed, and the speciation diagrams of U(VI) and P(V) in solutions and in equilibrium solid phases were constructed. Content Type Journal Article Pages 474-482 DOI 10.1134/S1066362211050055 Authors O. V. Nipruk, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia Yu. P. Pykhova, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia G. N. Chernorukov, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia N. S. Godovanova, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia R. V. Abrazheev, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    Sorption studies showed that a silicate material formed in the course of metallurgical slag reprocessing, containing dicalcium silicate as the major component, exhibits high affinity (log K d [ml g −1 ] 〉 4) for U(VI), Pu(IV), REE(III), and Th(IV) cations and for simple anions and appreciable affinity (log K d [ml g −1 ] 〉 2) for Cs(I) and Sr(II) cations in their sorption from river water. The sorbent can be of practical interest for separation, preconcentration, neutralization, and recovery of harmful chemical elements and radioactive substances from aqueous solutions, followed by their cementation (solidification) and safe disposal. Content Type Journal Article Pages 498-503 DOI 10.1134/S1066362211050092 Authors E. V. Polyakov, Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, ul. Pervomaiskaya 91, Yekaterinburg, 620990 Russia A. G. Tsvetokhin, All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Chelyabinsk oblast, Russia N. M. Barysheva, All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Chelyabinsk oblast, Russia N. A. Ovchinnikov, All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Chelyabinsk oblast, Russia I. Yu. Pashkeev, South Urals State University, Chelyabinsk, Russia G. G. Mikhailov, South Urals State University, Chelyabinsk, Russia I. V. Volkov, Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, ul. Pervomaiskaya 91, Yekaterinburg, 620990 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    Sorption and coprecipitation of U(VI) from aqueous solution containing various complexing anions (CO 3 25- , SO 4 2− , H 2 EDTA 2− ) with the Ni(OH) 2 solid phase at 25°C was studied. Uranium(VI) is not noticeably sorbed on the Ni(OH) 2 solid phase from aqueous solutions containing CO 3 2− and SO 4 2− . The distribution coefficients K d are less than 1.0 ml g −1 throughout the examined range of [U(VI)]: [L] ratios (L = CO 3 2− , SO 4 2− ) at V / m ≥ 100 ml g −1 and contact time of the solid and liquid phases of 60 min. In the presence and in the absence of H 2 EDTA 2− , the degree of the U(VI) sorption is essentially the same ( K d ∼90–140 ml g −1 at V / m ≥ 100 ml g −1 ). Uranium(VI) does not coprecipitate with Ni(OH) 2 from aqueous solutions containing SO 4 2− and H 2 EDTA 2− . The distribution coefficients K d are less than 0.001 ml g −1 at V / m ≥ 200 ml g −1 and contact time of the solid and liquid phases of 60 min. In solutions containing CO 3 2− , the U(VI) capture by the Ni(OH) 2 precipitate depends on the [CO 3 2− ]: [U(VI)] ratio. The higher the [CO 3 2− ]: [U(VI)] ratio, the more strongly U(VI) coprecipitates with Ni(OH) 2 . Content Type Journal Article Pages 510-515 DOI 10.1134/S1066362211050110 Authors S. A. Kulyukhin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia M. P. Gorbacheva, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    Sorption of Pu 4+ , UO 2 2+ , NpO 2 + , Am 3+ , and Eu 3+ ions on S-957 cation exchanger from 2–7 M HNO 3 solutions was studied. The following selectivity series was obtained: Pu 4+ 〉 UO 2 2+ 〉 NpO 2 + 〉 Am 3+ ≈ Eu 3+ . The static and dynamic capacities of the sorbent for Pu were determined, and the eluent composition for the efficient desorption was chosen. The possibility of separating Pu(IV)-Am(III) and Pu(IV)-Np(V) pairs on the sorbent in the column chromatography mode was demonstrated. Content Type Journal Article Pages 393-395 DOI 10.1134/S1066362211040096 Authors N. A. Nekrasova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Yu. V. Shumilova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia V. V. Milyutin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia V. M. Gelis, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia M. V. Logunov, Mayak Production Association, Federal State Unitary Enterprise, Ozersk, Chelyabinsk oblast, Russia E. V. Lyzlova, Mayak Production Association, Federal State Unitary Enterprise, Ozersk, Chelyabinsk oblast, Russia A. V. Glukhova, Mayak Production Association, Federal State Unitary Enterprise, Ozersk, Chelyabinsk oblast, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    Published data on the stability of Pu(VI) and Pu(V) in solutions of mineral and organic acids and their salts are analyzed. The hypothesis that Pu(VI) in acid solutions disappears owing to the disproportionation to Pu(VII) and Pu(V) cannot be accepted because of high redox potential of the Pu(VII)/(VI) couple. Plutonium( VI) is reduced owing to radiation-chemical reactions induced by its α-radiation and to the formation of a dimer (so-called excimer) by an excited Pu(VI) ion with an unexcited Pu(VI) ion, which rapidly decomposes to Pu(V) and H 2 O 2 . Plutonium(V) disappears owing to disproportionation and radiation-chemical processes. Content Type Journal Article Pages 466-473 DOI 10.1134/S1066362211050043 Authors V. P. Shilov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia A. V. Gogolev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    Decontamination of liquid radioactive waste (LW) from transuranium elements (TUEs) and uranium by complexation with phosphorus-containing and guanidine phosphate oligoethers and by ultrafiltration was studied. The rejection coefficient of TUEs and U on these oligomers reaches 99.0–99.6% of the initial concentration. Content Type Journal Article Pages 449-452 DOI 10.1134/S1066362211040205 Authors L. I. Rudenko, Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine, ul. Murmanskaya 1, Kiev, 02660 Ukraine O. A. Gumennaya, Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine, ul. Murmanskaya 1, Kiev, 02660 Ukraine O. V. Dzhuzha, Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine, ul. Murmanskaya 1, Kiev, 02660 Ukraine V. E. Khan, Institute of Nuclear Power Plant Safety Problems, National Academy of Sciences of Ukraine, Chernobyl, Kiev oblast, Ukraine M. Ya. Vortman, Institute of Chemistry of Macromolecular Compounds, National Academy of Sciences of Ukraine, Kiev, Ukraine V. N. Lemeshko, Institute of Chemistry of Macromolecular Compounds, National Academy of Sciences of Ukraine, Kiev, Ukraine N. S. Klimenko, Institute of Chemistry of Macromolecular Compounds, National Academy of Sciences of Ukraine, Kiev, Ukraine V. V. Shevchenko, Institute of Chemistry of Macromolecular Compounds, National Academy of Sciences of Ukraine, Kiev, Ukraine Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    Thermal oxidation of trace amounts of curium hydride yields a volatile form of CmO 2 and the previously unknown trioxide CmO 3 . They were separated by gas thermochromatography. Under the experimental conditions, the maxima of the deposition zones of Cm oxides on the surface of the quartz column were at 550 ± 25 and 390 ± 25°C, respectively. The calculated enthalpies of adsorption on quartz (kJ mol −1 ) were 185 ± 25 (for CmO 2 ) and 157 ± 25 (for CmO 3 ). Lower volatility of Cm di- and trioxide, compared to the analogous oxides of U, Np, Pu, and Am, is attributed to a decrease in the ionic radii of actinides along the actinide series and to the break in the order of filling of the 5 f shell in going from Am to Cm. The existence of volatile oxyfluoride and hexafluoride of Cm(VI) was suggested. Content Type Journal Article Pages 453-456 DOI 10.1134/S1066362211050018 Authors V. P. Domanov, Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980 Russia Yu. V. Lobanov, Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    The state of uranyl phosphates and arsenates (UO 2 ) 3 (PO 4 ) 2 · n H 2 O and (UO 2 ) 3 (AsO 4 ) 2 · n H 2 O in aqueous solutions in the interval of pH 1–14 was studied by X-ray diffraction, IR spectroscopy, thermography, and chemical analysis. The composition and structure of the initial solid phases vary depending on the solution acidity. The equilibrium constants of the reactions occurring in the heterogeneous systems (UO 2 ) 3 (B V O 4 ) 2 · n H 2 O (B V = P, As)-aqueous solution were calculated. The speciation diagrams of the solid phases and equilibrium solutions were plotted. Content Type Journal Article Pages 483-490 DOI 10.1134/S1066362211050067 Authors O. V. Nipruk, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia N. G. Chernorukov, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia Yu. P. Pykhova, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia N. S. Godovanova, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia A. A. Eremina, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    Sorption of 90 Sr and 90 Y from aqueous solutions on Mg-Al and Mg-Nd layered double hydroxides (LDHs) in various forms was studied. The distribution coefficients K d of U(VI) and 90 Sr on LDH-Mg-Al-EDTA are 100–120 ml g −1 in 15 min of contact of the solid and liquid phases at V / m = 50 ml g −1 . At the same time, under similar conditions, U(VI) and 90 Sr are not sorbed from aqueous solutions on LDH-Mg-Al-C 2 O 4 . The sorption of U(VI) from aqueous solutions containing H 2 EDTA 2− , C 2 O 4 2− , and CO 3 2− on LDH-Mg-Nd-CO 3 and LDH-Mg-Al-CO 3 strongly depends on the concentration of the complexing anions in the solution. In particular, for 10 −3 M aqueous UO 2 2+ solutions, with an increase in [C 2 O 4 2− ] from 10 −3 to 5 × 10 −2 M, K d of U(VI) decreases from 〉5 × 10 3 to 70 ml g −1 for LDH-Mg-Al-CO 3 and from 170 to ∼0 ml g −1 for LDH-Mg-Nd-CO 3 . In the presence of 10 −3 to 5 × 10 −2 M CO 3 2− in aqueous solution, U(VI) is not noticeably sorbed on LDH-Mg-Nd-CO 3 ( K d does not exceed 16 ml g −1 at V / m = 50 ml g −1 ), and on LDH-Mg-Al-CO 3 the sorption sharply decreases ( K d decreases from 〉5 × 10 3 to ∼0 ml g −1 at V / m = 50 ml g −1 ). The presence of complexing anions in the solution does not appreciably affect the 90 Sr sorption, but noticeably affects the 90Y sorption. With an increase in their concentration, K d of 90 Y appreciably decreases. The effect exerted by Sr 2+ ions on the sorption of microamounts of U(VI) and by UO 2 2+ ions on the sorption of microamounts of 90 Sr and 90 Y from aqueous solutions on LDH-Mg-Nd-CO 3 was also examined. Content Type Journal Article Pages 504-509 DOI 10.1134/S1066362211050109 Authors S. A. Kulyukhin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia E. P. Krasavina, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia I. A. Rumer, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia L. V. Mizina, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia N. A. Konovalova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia I. V. Gredina, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    The complex [UO 2 (OH)(CO(NH 2 ) 2 ) 3 ] 2 (ClO 4 ) 2 ( I ) was synthesized. A single crystal X-ray diffraction study showed that compound I crystallizes in the triclinic system with the unit cell parameters a = 7.1410(2), b = 10.1097(2), c = 11.0240(4) Å, α = 104.648(1)°, β = 103.088(1)°, γ = 108.549(1)°, space group , Z = 1, R = 0.0193. The uranium-containing structural units of the crystals are binuclear groups [UO 2 (OH)· (CO(NH 2 ) 2 ) 3 ] 2 2+ belonging to crystal-chemical group AM 2 M 3 1 [A = UO 2 2+ , M 2 = OH − , M 1 = CO(NH 2 ) 2 ] of uranyl complexes. The crystal-chemical analysis of nonvalent interactions using the method of molecular Voronoi-Dirichlet polyhedra was performed, and the IR spectra of crystals of I were analyzed. Content Type Journal Article Pages 457-461 DOI 10.1134/S106636221105002X Authors L. B. Serezhkina, Samara State University, ul. Akad. Pavlova 1, Samara, 443011 Russia E. V. Peresypkina, Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia A. V. Virovets, Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia E. S. Klynin, Samara State University, ul. Akad. Pavlova 1, Samara, 443011 Russia V. N. Serezhkin, Samara State University, ul. Akad. Pavlova 1, Samara, 443011 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    A method was suggested for the cyclotron production of 88 Y with liquid-liquid extraction. The sedimented nat SrCO 3 target was irradiated with 18-MeV protons at current of 20 μA for 10 h. The 88 Y yields of about 1.326 MBq μA −1 h −1 were experimentally obtained. Solvent extraction of no-carrier-added 88 Y from irradiated strontium carbonate target in the hydrochloric acid solution was studied using di(2-ethylhexyl) hydrogen phosphate (HDEHP). The optimum separation was achieved in the system n -hexane/10% HDEHP-0.1 M HCl. Yttrium radionuclides were recovered from the HDEHP phase by stripping with 60 ml of 9 M HC1. Also, excitation functions of the proton, deuteron, and α-particle induced reactions of 89 Y, 88 Sr, nat Sr, and natRb were determined using computer codes and compared to the existing data. Content Type Journal Article Pages 539-544 DOI 10.1134/S106636221105016X Authors M. Sadeghi, Agricultural, Medical, and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box 31485/498, Karaj, Iran M. Enferadi, Iranian Applied Research Center for Public Health and Sustainable Development, North Khorasan University of Medical Sciences, Bojnurd, Iran Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    A new Np(V) chromate complex with outer-sphere sodium cations, Na 3 [NpO 2 (CrO 4 ) 2 ](H 2 O) 5 ( I ), was synthesized from aqueous solution. Its composition and structure were determined by single crystal X-ray diffraction. The structure of I is based on anionic chains of the composition [NpO 2 (CrO4)2] n 3 n − , running along [010] and forming layers parallel to the (101) plane. The Na + ions and water molecules of crystallization are arranged between the layers. The coordination polyhedra of the Np atoms (pentagonal bipyramids) are combined pairwise by sharing common equatorial edges formed by two bridging oxygen atoms of bidentate chelate-bridging CrO 4 groups. The absorption spectra of I in the IR and visible ranges are presented. Content Type Journal Article Pages 462-465 DOI 10.1134/S1066362211050031 Authors N. A. Budantseva, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia M. S. Grigor’ev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    A novel 227 Ac/ 223 Ra extraction generator for nuclear medicine was developed. Its operation is based on selective extraction of 223 Ra with a solution of chlorinated cobalt dicarbollide and polyethylene glycol in a polar diluent from a solution of a mineral acid and a complexing agent. Radium is stripped to any appropriate aqueous solution on adding TBP into the extractant. Trials performed in the manual mode showed that 223 Ra is efficiently separated from the parent isotopes 227 Ac and 227 Th (decontamination factor of 223 Ra from 227 Ac and 227 Th 〉10 6 ). It is the most convenient to use the 223 Ra generator for the radionuclide production in a regional center, because it allows fairly simple production of large batches of 223 Ra, avoiding problems associated with the need for skilled staff for working with the generator in a medical center and with the radiation-induced degradation of the matrix (ion-exchange resin). Content Type Journal Article Pages 404-406 DOI 10.1134/S1066362211040126 Authors D. N. Shishkin, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia S. V. Krupitskii, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia S. A. Kuznetsov, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    The sorption behavior of light rare-earth elements (La, Ce, Nd, Sm) on resorcinol-formaldehyde (RF) resin was studied. The effect of pH, shaking time, and temperature on the metal distribution coefficients was examined. The RF resin affinity for the examined lanthanides increases with a decrease in the ionic radius of the metal ion: Sm 〉 Ce 〉 Nd 〉 La. The capacity of RF resins for the lanthanides shows the same trend. Because of the relatively high capacity of the resin, the presence of interfering ions affects the sorption percentage of the light REEs insignificantly. The thermodynamic functions of the sorption process were determined. They show that the adsorption of the light lanthanides on RF resin occurs spontaneously with the dehydrated metal ion. Content Type Journal Article Pages 396-400 DOI 10.1134/S1066362211040102 Authors S. A. Shady, Hot Laboratories Center, Atomic Energy Authority, P.O. 13759, Cairo, Egypt M. F. Attallah, Hot Laboratories Center, Atomic Energy Authority, P.O. 13759, Cairo, Egypt E. H. Borai, Hot Laboratories Center, Atomic Energy Authority, P.O. 13759, Cairo, Egypt Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    The simplest and the most efficient method for decontamination of sandy soils is separation of the finely dispersed fraction (〈0.1 mm), with which ∼90% of the contaminating radionuclides are associated, by gravity sedimentation in water. However, for sandy soils from the Russian Research Centre Kurchatov Institute, the decontamination factor in this case is as low as 4–5. The decontamination factor can be further increased by using reagent treatment. The main parameters of the process are reagent composition and concentration, temperature, and liquid to solid ratio. The decontamination factor of 10–14 can be attained by reagent treatment with 2 M H 2 SO 4 + 1 M H 3 PO 4 or 3–4 M H 2 SO 4 solutions for 7 h at 80°C, at the liquid to solid ratio of no less than 2 : 1. Two times higher decontamination factor can be attained by treatment with a 2 M H 2 SO 4 + 0.6 M NH 4 F solution, but high toxicity of fluorides restricts the possibility of using this reagent. Content Type Journal Article Pages 437-442 DOI 10.1134/S1066362211040187 Authors S. A. Dmitriev, Joint Environmental, Engineering, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association, Federal Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia A. S. Barinov, Joint Environmental, Engineering, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association, Federal Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia V. M. Kuptsov, Joint Environmental, Engineering, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association, Federal Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    The valence states of “hot” 237 Np atoms arising from α-decay of 241 Am atoms incorporated in quenched melts of alkali metal nitrates or sorbed on ion-exchange materials were studied by emission Mössbauer spectroscopy. Content Type Journal Article Pages 523-528 DOI 10.1134/S1066362211050134 Authors G. A. Skorobogatov, Radiochemistry Chair, Chemical Faculty, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia S. I. Bondarevskii, St. Petersburg State Polytechnic University, St. Petersburg, Russia V. V. Eremin, Radiochemistry Chair, Chemical Faculty, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia S. A. Timofeev, Radiochemistry Chair, Chemical Faculty, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    The excitation functions for the 72 Ge( p,n ) 72 As and nat Ge( p,xn ) 72 As reactions were calculated by ALICE/91, ALICE/ASH, and TALYS-1.2 codes and compared to the existing data. Deposition of GeO 2 on a Cu substrate was carried out using two special sedimentation methods for the production of 72 As, and a simple procedure for As separation was described. The targets were checked by SEM and thermal shock test. The optimal thicknesses of the target was substantiated, and theoretical calculation of the production yield was made for the 72 Ge( p,xn ) 72 As reaction. Content Type Journal Article Pages 407-410 DOI 10.1134/S1066362211040138 Authors M. Enferadi, Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran M. Sadeghi, Agricultural, Medical, and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box 31485/498, Karaj, Iran H. Nadi, Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    The capacity for NbF 5 of granulated sodium fluoride at 100 and 400°C and of magnesium fluoride at 125°C was determined. The choice of the sorbents and temperatures is governed by the possibility of using the sorbents at these temperatures for decontamination of UF 6 from fission product impurities in reprocessing of spent nuclear fuel by the fluoride volatility technology. The presence of UF 6 in the gases does not appreciably affect the sorbent capacities. Sodium fluoride at 400°C is suitable for decontamination of UF 6 from NbF 5 as one of impurities. Content Type Journal Article Pages 389-392 DOI 10.1134/S1066362211040084 Authors M. B. Seregin, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia A. A. Mikhalichenko, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia O. V. Vishnyakova, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia A. Yu. Kuznetsov, Leading Research Institute of Chemical Technology, Public Joint-Stock Company, Kashirskoe shosse 33, Moscow, 115409 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    An X-ray diffraction study of Rb[UO 2 (SeO 4 )F]·H 2 O ( I ) was performed. The compound crystallizes in the rhombic system with the following unit cell parameters: a = 8.4753(6), b = 13.5234(9), c = 13.5296(9) Å, space group Pnma, Z = 8, V = 1550.7(2) Å 3 ; R = 0.0248. The principal structural units of crystals of I are [UO 2 (SeO 4 )F] − layers belonging to crystal-chemical group AT 3 M 2 (A = UO 2 2+ , T 3 = SeO 4 2− , M 2 = F − ) of uranyl complexes. The uranium-containing layered units are combined via electrostatic interaction with Rb cations and via a system of hydrogen bonds involving outer-sphere water molecules. Content Type Journal Article Pages 354-357 DOI 10.1134/S1066362211040023 Authors L. B. Serezhkina, Samara State University, ul. Akad. Pavlova 1, Samara, 443011 Russia A. V. Vologzhanina, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia A. G. Verevkin, Samara State University, ul. Akad. Pavlova 1, Samara, 443011 Russia V. N. Serezhkin, Samara State University, ul. Akad. Pavlova 1, Samara, 443011 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    A novel inorganic ion exchanger, aluminum tungstate, was prepared and characterized by spectroscopic tools and elemental analysis. The compound is resistant to heat and radiation and is stable in diverse chemical environments. This material exhibits an excellent adsorption of parent-daughter 137 Cs- 137 m Ba. The newly prepared crystalline inorganic ion exchanger was employed for separation of the carrier-free 137 m Ba from 137 Cs using 0.0426 M ascorbic acid solution as eluting agent. Trend in elution is encouraging to apply the system as radionuclide generator. Content Type Journal Article Pages 534-538 DOI 10.1134/S1066362211050158 Authors R. Chakraborty, Department of Chemistry, University of Burdwan, Burdwan, 713104 West Bengal, India S. Dhara, Department of Chemistry, University of Burdwan, Burdwan, 713104 West Bengal, India S. Sarkar, Department of Chemistry, University of Burdwan, Burdwan, 713104 West Bengal, India S. Basu, Department of Chemistry, University of Burdwan, Burdwan, 713104 West Bengal, India P. Chattopadhyay, Department of Chemistry, University of Burdwan, Burdwan, 713104 West Bengal, India Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    Extraction of microamounts of U(VI), Th(IV), and REE(III) from HNO 3 solutions with solutions of ( N,N -dialkylcarbamoylmethyl)- and ( N -alkylcarbamoylmethyl)phenylphosphinic acids in dichloroethane was studied. The stoichiometry of the extractable complexes was determined, and the influence exerted on the efficiency of the U(VI), Th(IV), and REE(III) recovery into the organic phase by the extractant structure, organic diluent, and aqueous phase composition was examined. The possibility of selective recovery and concentration of U(VI), Th(IV), and REE(III) from nitric acid solutions with a complexing sorbent prepared by noncovalent immobilization of the examined polyfunctional organophosphorus acids on a macroporous polymeric matrix was demonstrated. Content Type Journal Article Pages 375-382 DOI 10.1134/S1066362211040060 Authors A. N. Turanov, Institute of Solid State Physics, Russian Academy of Sciences, Institutskaya ul. 2, Chernogolovka, Moscow oblast, 142432 Russia V. K. Karandashev, Institute of Technological Problems of Microelectronics and Ultrapure Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia E. V. Sharova, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia O. I. Artyushin, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia I. L. Odinets, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    The nuclear-physical properties of 45 Ti (half-life 3.08 h, 85% β + -decay, 15% electron capture, daughter isotope 45 Sc) make it suitable for positron emission tomography. 45 Ti can be produced at a small cyclotron in a high yield, 450 MBq μA −1 h −1 , using the 45 Sc( p,n ) 45 Ti nuclear reaction on a natural scandium target. The excitation functions for the 45 Sc( p,n ) 45 Ti reaction were calculated by ALICE/91, ALICE/ASH, and TALYS-1.2 codes and compared to the existing data. Deposition of Sc 2 O 3 on a Cu substrate was carried out by two sedimentation methods for the production of 45 Ti, and a simple method for radiochemical separation of radiotitanium was suggested. The targets were examined by SEM and subjected to thermal shock test. The optimal thicknesses of target was substantiated, and the production yield for the 45 Sc( p,n ) 45 Ti reaction was calculated. Content Type Journal Article Pages 411-414 DOI 10.1134/S106636221104014X Authors M. Sadeghi, Agricultural, Medical. and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box: 31485/498, Karaj, Iran M. Enferadi, Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran H. Nadi, Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    Formation of complexes of Co 2+ with triethylenediamine (CH 2 -CH 2 ) 3 N 2 (Q) in aqueous solution and coprecipitation of microamounts of 60 Co with triethylenediamine complexes of Cu 2+ , Ni 2+ , and Zn 2+ nitrates were studied. Microamounts of 60 Co poorly coprecipitate with triethylenediamine complexes of Cu 2+ and Zn 2+ nitrates. At practically 100% precipitation of Cu 2+ and Zn 2+ from solutions in the form of the corresponding complexes, the degree of coprecipitation of 60 Co with these complexes does not exceed 15%. With the Ni 2+ complexes formed from 10 −1 M aqueous solutions at the molar ratios Ni 2+ : Q = 1 : 1 and 1 : 2, the degree of coprecipitation of 60 Co is about 45 and 90%, respectively. Content Type Journal Article Pages 401-403 DOI 10.1134/S1066362211040114 Authors S. A. Kulyukhin, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia M. P. Gorbacheva, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia L. V. Mizina, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia I. A. Rumer, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia N. A. Konovalova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia E. P. Krasavina, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 4

Description:    The effect of various catalysts and temperature on the solid-phase isotope exchange of 5-fluorouracil and 5-fluorocytosine with tritium was studied. The isotope exchange yielding the desired compounds is accompanied by dehalogenation and hydrogenation of the 5,6-double bond of the pyrimidine ring. Performing the reaction at a temperature below 160°C allowed the process to be carried out selectively, i.e., with the preservation of the functional groups and double bond in the starting compound. The yields of various products formed in the reactions of tritium with the above compounds were estimated. Synthesis conditions were found, and tritium-labeled 5-fluorouracil and 5-fluorocytosine were prepared with the molar radioactivity of 0.45 Ci mmol −1 (16.7 TBq mol −1 ) and 4.4 Ci mmol −1 (0.16 PBq mol −1 ), respectively, and with the purity exceeding 98%. Content Type Journal Article Pages 648-650 DOI 10.1134/S1066362211060142 Authors G. V. Sidorov, Institute of Molecular Genetics, Russian Academy of Sciences, pl. Akad. Kurchatova 2, Moscow, 123182 Russia N. F. Myasoedov, Institute of Molecular Genetics, Russian Academy of Sciences, pl. Akad. Kurchatova 2, Moscow, 123182 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    Granulated sorbents for recovery of cobalt radionuclides were prepared from carbonate natural raw material (dolomite) using thermal activation. The chemical and phase composition and the main physicochemical properties of the sorbents were determined. Their ability to sorb 60 Co under dynamic conditions was evaluated. Among all the tested samples, the sorbent prepared at 900°C exhibits the best sorption and service characteristics (degree of recovery 0.8–1.0, distribution coefficient 1.7 × 10 3 ml g −1 , total absorbed specific activity 7.7 × 10 4 Bq g −1 ). Content Type Journal Article Pages 633-637 DOI 10.1134/S1066362211060105 Authors A. I. Rat’ko, Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, ul. Surganova 9, block 1, Minsk, 220072 Belarus A. I. Ivanets, Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, ul. Surganova 9, block 1, Minsk, 220072 Belarus I. O. Sakhar, Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, ul. Surganova 9, block 1, Minsk, 220072 Belarus D. Yu. Davydov, Joint Institute for Energy and Nuclear Research—Sosny, National Academy of Sciences of Belarus, ul. Krasina 99, Minsk, 220109 Belarus V. V. Toropova, Joint Institute for Energy and Nuclear Research—Sosny, National Academy of Sciences of Belarus, ul. Krasina 99, Minsk, 220109 Belarus A. V. Radkevich, Joint Institute for Energy and Nuclear Research—Sosny, National Academy of Sciences of Belarus, ul. Krasina 99, Minsk, 220109 Belarus Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    The influence of temperature on the solid-phase isotope exchange of Ganciclovir with tritium was studied. Synthesis conditions were found, and tritium-labeled Ganciclovir with the molar radioactivity of 25 Ci mmol −1 (0.925 PBq mol −1 ) and purity higher than 98% was prepared. Content Type Journal Article Pages 646-647 DOI 10.1134/S1066362211060130 Authors G. V. Sidorov, Institute of Molecular Genetics, Russian Academy of Sciences, pl. Akad. Kurchatova 2, Moscow, 123182 Russia N. F. Myasoedov, Institute of Molecular Genetics, Russian Academy of Sciences, pl. Akad. Kurchatova 2, Moscow, 123182 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    A new Pu(VII) compound, Na 3 [PuO 4 (OH) 2 ]·2H 2 O, was prepared by X-ray diffraction analysis, and its structure was studied. To reveal the character of actinide contraction in going from Np(VII) to Pu(VII), the geometric parameters of the tetragonal-bipyramidal surrounding of Pu(VII) in the [PuO 4 (OH) 2 ] 3− anion were compared with those of Np(VII) in the previously studied isostructural compound Na 3 [NpO 4 (OH) 2 ]·2H 2 O. To reveal the specific feature of hydrogen bonding in crystals of the general composition Na 3 [NpO 4 (OH) 2 ]· n H 2 O ( n = 0, 2, 4), the structure of the compound Na 3 [NpO 4 (OH) 2 ]·4H 2 O studied previously by the photographic method was refined. The effect of hydrogen bonds on the geometric characteristics of the coordination polyhedra of the Np and Na atoms was considered. Content Type Journal Article Pages 582-586 DOI 10.1134/S1066362211060038 Authors N. N. Krot, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia I. A. Charushnikova, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia M. S. Grigor’ev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia V. P. Perminov, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119071 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    The complexes [NpO 2 (DMSO) 5 ](ClO 4 ) 2 ( 1 ) and [PuO 2 (DMSO) 5 ](ClO 4 ) 2 ( 2 ), isostructural to the known uranyl complex, were synthesized in the form of single crystals. Their crystallographic characteristics were determined by single crystal X-ray diffraction. The IR and electronic absorption spectra of the crystalline U(VI), Np(VI), and Pu(VI) complexes were measured and analyzed. Content Type Journal Article Pages 576-581 DOI 10.1134/S1066362211060026 Authors N. A. Budantseva, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia M. S. Grigor’ev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia V. I. Mishkevich, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia A. M. Fedoseev, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    The possibilities of reagent treatment of the finely dispersed (〈0.1 mm) fraction of soils by agitation leaching at 80°C for 7 h at the liquid to solid ratio of 2: 1 were examined. The reagents were 2–8 M H 2 SO 4 and mixtures of H 2 SO 4 with H 3 PO 4 and NH 4 F. The maximal attained decontamination factor (DF) does not exceed 8–10, and the soil loss for the dissolution does not exceed ∼12%. Reagent treatment with 1–5 M sulfuric acid in a pressure vessel in the temperature range 80–140°C allowed the maximal DF value of ∼70 to be attained, with the soil weight loss reaching 15% and acid consumption, 3 mol per kilogram of soil. The reagent treatment of the finely dispersed fraction can be successfully combined with the decontamination method based on separation of the finely dispersed fraction by gravity sedimentation in water, especially at a high content of the finely dispersed substance. Content Type Journal Article Pages 669-672 DOI 10.1134/S1066362211060178 Authors S. A. Dmitriev, Joint Environmental, Technological, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association State Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia A. S. Barinov, Joint Environmental, Technological, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association State Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia V. M. Kuptsov, Joint Environmental, Technological, and Research Center for Radioactive Waste Management and Environment Protection (Radon Moscow Research and Production Association State Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    The formation of uranium oxides by thermal decomposition of uranyl diaquadihydroxylaminate monohydrate, ammonium diuranate, ammonium tricarbonatouranylate, and uranium peroxide under the action of microwave (MW) radiation was studied. Uranium dioxide is formed by decomposition of these compounds in a reducing atmosphere at the MW radiation power of 600 W and treatment time of 5–10 min. In air, under the same conditions, U 3 O 8 is formed. Under the action of MW radiation, substandard ceramic pellets of UO 2 fuel can be readily converted in air to powdered U 3 O 8 . The use of MW radiation for thermal decomposition of uranium compounds allows the power and time consumption to be considerably reduced relative to the process with electrical resistance furnaces. A quick method for gravimetric testing of the composition of uranium oxides (UO 2 or U 3 O 8 ) using MW radiation was suggested. Content Type Journal Article Pages 604-607 DOI 10.1134/S1066362211060063 Authors Yu. M. Kulyako, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia T. I. Trofimov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia M. D. Samsonov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia S. A. Perevalov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia S. E. Vinokurov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia E. G. Il’in, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia B. F. Myasoedov, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    Double thorium phosphates M k Th 3− k (PO 4 ) 4− k (M I = Li, Na, Ag, K, Rb, Tl, Cs; M II = Cd, Ca, Sr, Pb) and thorium phosphate diphosphate Th 4 (PO 4 ) 4 P 2 O 7 were synthesized by a high-temperature solid-phase reaction. The double thorium phosphates crystallize in the monoclinic system [space group C 2/ c for M I Th 2 (PO 4 ) 3 and P 2 1 / n for M II Th(PO 4 ) 2 ], and the compound Th 4 (PO 4 ) 4 P 2 O 7 , in the rhombic system (space group Pcam ). The bands in the IR spectra were assigned. The double thorium phosphates exhibit high thermal stability. The compounds KTh 2 (PO 4 ) 3 , CaTh(PO 4 ) 2 , and Th 4 (PO 4 ) 4 P 2 O 7 were studied by high-temperature X-ray diffraction. Content Type Journal Article Pages 587-592 DOI 10.1134/S106636221106004X Authors A. V. Knyazev, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia N. G. Chernorukov, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia A. A. Sazonov, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia M. E. Komshina, Lobachevsky Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    Isotope composition of U in minerals of two mineral associations based on aeschynite and pyrochlore was studied. Although the ratio of U isotopes in the mineral associations as a whole is equilibrium (or close to equilibrium), the distribution of the radiogenic 234 U isotope between separate parts of these associations is essentially nonuniform. Two models of the disturbance of the radioactive equilibrium are discussed: dependence of the 234 U/ 238 U ratio on the U concentration in the mineral (Adloff-Roessler model) and transfer of 234 Th recoil atoms from one phase to another (Sheng-Kuroda model). It is impossible within the framework of any of the models to consistently account for the observed distribution of the radiogenic U between different mineral phases. For the quasi-closed mineral system based on aeschynite, a model of the redistribution of the radiogenic U under the action of natural solutions mainly within the mineral association is suggested; for the open system involving pyrochlore, the effects of natural leaching are explained taking into account the valence and chemical state of uranium in the minerals. Content Type Journal Article Pages 651-661 DOI 10.1134/S1066362211060154 Authors R. V. Bogdanov, St. Petersburg State University, Universitetskaya nab. 7-9, St. Petersburg, 199034 Russia E. V. Puchkova, St. Petersburg State University, Universitetskaya nab. 7-9, St. Petersburg, 199034 Russia N. G. Parnikov, St. Petersburg State University, Universitetskaya nab. 7-9, St. Petersburg, 199034 Russia A. S. Sergeev, St. Petersburg State University, Universitetskaya nab. 7-9, St. Petersburg, 199034 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    Neutron irradiation of a natural Sm target is performed to produce 153 Sm. Ion-exchange chromatography is used to separate 153 Sm from Eu radionuclides produced in the process. To prepare a target, Sm 2 O 3 powder is dissolved in 0.2 ml of HNO 3 in a quartz vial. Samarium is deposited onto the vial walls by passing nitrogen gas at 120°C. The prepared samarium target is encapsulated in aluminum foil and irradiated in a 5-MW reactor in 5 × 10 13 n cm −2 s −1 flux. The irradiated target is dissolved in 1 M HCl, and the produced radioisotopes are determined with an HPGe nuclear detector. Finally 153 Sm is separated from Eu radionuclides with 153 Sm recovery yield of more than 66% and purity better than 99.8%. Content Type Journal Article Pages 642-645 DOI 10.1134/S1066362211060129 Authors S. Z. Islami-Rad, Nuclear Engineering and Physics Department, Amir Kabir University, P.O. Box 15875-4413, Tehran, Iran M. Shamsaei, Nuclear Engineering and Physics Department, Amir Kabir University, P.O. Box 15875-4413, Tehran, Iran R. Gholipour-Peyvandi, Nuclear Science and Technology Research Institute, AEOI, P.O. Box 14155-1339, Tehran, Iran M. Ghannadi-Maragheh, Nuclear Science and Technology Research Institute, AEOI, P.O. Box 14155-1339, Tehran, Iran Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    The Mo extracts prepared by contacting dibutyl hydrogen phosphate (HDBP, HA) dissolved in xylene or CCl 4 with HNO 3 solutions of various concentrations in a wide range of Mo concentrations, and also the third phase formed in the analogous extraction system with tridecane as diluent were examined by IR and UV spectroscopy. The data obtained confirm the conclusion that, at the ratios HDBP: Mo ≥ 4 in the extract, molybdenum is extracted in the form of the acidic salt MoO 2 (HA 2 ) 2 . The spectroscopic data obtained at higher extract loading were interpreted assuming the formation of binuclear complexes (HA 2 )MoO 2 A 2 MoO 2 (HA 2 ) and, at HDBP: Mo 〈 3, of complexes of hydroxomolybdenyl and/or dimolybdenyl, and finally of polymeric complexes with bridging Mo-O-Mo bonds. In strongly acidic media, coextraction of outer-sphere molecular HNO 3 and the presence of coordinated nitrate ion in the extract (probably in the form of molybdenyl nitrate complexes) are observed. A multistep extraction mechanism involving formation in the aqueous phase of an asymmetric monomeric complex MoO 2 (OH)(H 2 O)(HA 2 ) was suggested. Content Type Journal Article Pages 619-632 DOI 10.1134/S1066362211060099 Authors N. D. Goletskii, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia B. Ya. Zilberman, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia Yu. S. Fedorov, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia E. A. Puzikov, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia A. A. Lumpov, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia L. G. Mashirov, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia G. V. Sidorenko, Khlopin Radium Institute, Research and Production Association, Federal State Unitary Enterprise, 2-i Murinskii pr. 28, St. Petersburg, 194021 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6

Description:    Treatment of liquid radioactive concentrates (LRCs) from the Leipunskii Institute of Energy Physics using Termoksid-35 ferrocyanide sorbent was studied. After passing LRC with a volume activity of 3.9 × 10 8 Bq l −1 through a column packed with the sorbent, the volume activity of the filtrate does not exceed 3.7 × 10 4 Bq l −1 . The LRC decontaminated from the major amount of radionuclides is fed to cementation. A formulation of a cement compound with a polyfunctional additive consisting of finely dispersed cement, bentonite clay, biocidal additive, plasticizer, and defoamer was developed. For the storage of a container filter with the spent ferrocyanide sorbent, it is suggested to place it in a 1 m 3 metallic container in which the cement compound with the LRC decontaminated from the major fraction of cesium acts as biological protection. The γ-radiation dose rate from the 1 m 3 container filled with the cement compound, with the filter with the spent sorbent placed inside, was calculated. A technology for processing of liquid radioactive concentrates from the Leipunskii Institute of Energy Physics was suggested and substantiated. Content Type Journal Article Pages 563-567 DOI 10.1134/S1066362211050213 Authors A. E. Savkin, Joint Environmental-Engineering and Research Center for Radioactive Waste Decontamination and Environment Protection (Radon Moscow Research and Production Association, State Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia A. P. Varlakov, Joint Environmental-Engineering and Research Center for Radioactive Waste Decontamination and Environment Protection (Radon Moscow Research and Production Association, State Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    Speciation of radionuclides in low-salinity liquid radioactive wastes (LRW) formed in the course of reprocessing and storage of radioactive wastes at the Radon Moscow Research and Production Association was studied. 137 Cs is present in LRW mainly in the ionic form; α-emitting radionuclides, in the colloidal form; and 90 Sr, in both colloidal and ionic forms. Coagulation methods with FeCl 3 and methods of peroxide and permanganate oxidation were tested for removing organic substances from LRW. A two-step reverse-osmosis apparatus was tested for removing the major fraction of radionuclides and salts from the LRW. Laboratory experiments on sorption refinement of the permeate from the first step of reverse osmosis were performed with ionexchange resins and an NZhS type ferrocyanide sorbent. A new flowsheet for a water-treatment installation (WTI), allowing considerable reduction of the volume of secondary radioactive wastes, was suggested. The WTI was put into operation in 2010. Content Type Journal Article Pages 559-562 DOI 10.1134/S1066362211050201 Authors A. E. Savkin, Joint Environmental-Engineering and Research Center for Radioactive Waste Decontamination and Environment Protection (Radon Moscow Research and Production Association, State Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia Yu. V. Karlin, Joint Environmental-Engineering and Research Center for Radioactive Waste Decontamination and Environment Protection (Radon Moscow Research and Production Association, State Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia M. A. Maryakhin, Joint Environmental-Engineering and Research Center for Radioactive Waste Decontamination and Environment Protection (Radon Moscow Research and Production Association, State Unitary Enterprise), 7-i Rostovskii per. 2/14, Moscow, 119121 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 5

Description:    Single crystals of new uranyl selenates K 2 (H 5 O 2 )(H 3 O)[(UO 2 ) 2 (SeO 4 ) 4 (H 2 O) 2 ](H 2 O) 4 ( 1 ) and K 3 (H 3 O)[(UO 2 ) 2 (SeO 4 ) 4 (H 2 O) 2 ](H 2 O) 5 ( 2 ) were prepared by isothermal evaporation at room temperature. The crystal structure of 1 was solved by the direct method [ C 2/ c, a = 17.879(5), b = 8.152(5), c = 17.872(5) Å, β = 96.943(5)°, V = 2585.7(19) Å 3 , Z = 4] and refined to R 1 = 0.0449 ( wR 2 = 0.0952) for 2600 reflections with | F o | ≥ 4σ F . The structure of 2 was solved by the direct method [ P 2 1 / c, a = 17.8377(5), b = 8.1478(5), c = 23.696(1) Å, β = 131.622(2)°, V = 2574.5(2) Å 3 , Z = 4] and refined to R 1 = 0.0516 ( wR 2 = 0.1233) for 4075 reflections with | F o | ≥ 4σ F . The structures of 1 and 2 are based on [(UO 2 ) 2 (SeO 4 ) 4 (H 2 O) 2 ] 4− layers. The charge of the inorganic layer is compensated by potassium and oxonium ions arranged in the interlayer space. Each K ion is surrounded by seven O atoms belonging to uranyl selenate layers and water molecules, so that it binds with each other the adjacent uranyl selenate structural elements. Content Type Journal Article Pages 569-575 DOI 10.1134/S1066362211060014 Authors V. V. Gurzhiy, Chair of Crystallography, Geological Faculty, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia O. S. Tyumentseva, Frumkin Institute of Physical Chemistry and Electrochemistry, Leninskii pr. 31, block 4, Moscow, 119991 Russia S. V. Krivovichev, Chair of Crystallography, Geological Faculty, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034 Russia I. G. Tananaev, Frumkin Institute of Physical Chemistry and Electrochemistry, Leninskii pr. 31, block 4, Moscow, 119991 Russia B. F. Myasoedov, Frumkin Institute of Physical Chemistry and Electrochemistry, Leninskii pr. 31, block 4, Moscow, 119991 Russia Journal Radiochemistry Online ISSN 1608-3288 Print ISSN 1066-3622 Journal Volume Volume 53 Journal Issue Volume 53, Number 6