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  • 1
    Electronic Resource
    Electronic Resource
    222Rn content and234U/238U activity ratio in groundwaters (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 141 (1990), S. 17-23 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Geochemical radioanalytical studies of groundwater were performed in the valleys of Villa de Reyes and San Luis Potosi (Mexico). The experiments were designed to measure radon and uranium content and234U/238U activity ratio in groundwater samples taken from wells in these sites and at the Nuclear Center of Salazar, Mexico.222Rn content varied depending on the sample source, reaching a maximum value of 235 pCi/l; uranium concentration results were less than 1 μg/1 and234U/238U activity ratios were close to equilibrium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02060181
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  • 2
    Electronic Resource
    Electronic Resource
    Sodium and chlorine levels in hair and nails of healthy and cystic fibrosis children (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 181 (1994), S. 33-41 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This study reports sodium and chlorine values in μg/g, as detemined by neutron activation analysis in washed hair and nails from healthy and cystic fibrosis children. The values thus determined in cystic fibrosis tended to be higher than those in controls, however statistical differences were not significant (p〉0.01). Additional experiments were carried out for comparison between washed and unwashed samples of the cystic fibrosis and control group and only the differences between washed and unwashed cystic fibrosis nails were significant (p〈0.01) in both odium and chlorine values. Analysis of a standard reference milk sample, A-11 from IAEA, for the elements mentioned above gave a good agreement with the certified values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037545
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  • 3
    Electronic Resource
    Electronic Resource
    Sorption of strontium by Mexican erionite (1996)
    Springer
    Journal of radioanalytical and nuclear chemistry 204 (1996), S. 415-422 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The apparent diffusion coefficient of Sr2+ in natural Mexican erionite from Sonora at different pH and concentrations were determined. Neutron activation was applied to measure the sorption of strontium. The apparent diffusion coefficient values showed that the mobility of Sr2+ through the cavities of the erionite depended on the concentration of strontium and the pH of the solution. As a consequence the sorption of this ion by the erionite was affected by these parameters and the maximum sorption of Sr2+ was at pH higher than 3 and 0.0094 mol·l−1 strontium nitrate solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02060329
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  • 4
    Electronic Resource
    Electronic Resource
    Characterization of UO 2 2+ exchanged Y zeolite (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 222 (1997), S. 235-237 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The present study discusses the incorporation of uranyl ion into Y-zeolite framework. The UO 2 2+ sorption was measured by neutron activation analyses. The Y-zeolite framework distorts in response to the cations present in the structure. Hence, depending on the amount and the location of the exchanged cations, the features of the X-ray diffraction pattern may vary. From the Rietveld analysis of these patterns, the positions occupied by the UO 2 2+ cations in the zeolite network were determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02034277
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  • 5
    Electronic Resource
    Electronic Resource
    Natural radioactivity of building materials (1986)
    Springer
    Journal of radioanalytical and nuclear chemistry 103 (1986), S. 231-240 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Experiments were designed to measure trace uranium concentration and the rate of radon exhalation from masonry structural materials, both bare and surface finished and coated. LR115 cellulose nitrate track detectors were used to record the alpha emission from structural material surface. Fission track, neutron activation and fluorometric analysis methods were used to determine the uranium content. Most types of paints studied will reduce alpha contribution and radon emanation from building materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02165604
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  • 6
    Electronic Resource
    Electronic Resource
    Sorption of131I− by hydrotalcites (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 221 (1997), S. 63-66 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In this work, hydrotalcites were used to remove131I− from aqueous solutions. It was found that131I− sorption by hydrotalcites depends greatly on the thermal treatment of the solid and does not take place by ion exchange as I− is not capable of removing CO 3 −2 or other ions in the hydrotalcite. The anions have to be removed from the solid in order to permit I− to be sorbed in the hydrotalcite. The radionuclide content was determined by γ-spectrometry and X-ray diffraction was used to identify the compounds and to estimate cell parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035243
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  • 7
    Electronic Resource
    Electronic Resource
    131I− sorption from aqueous solutions by nitrated hydrotalcites (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 241 (1999), S. 595-599 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The sorption of radioactive iodide anion from aqueous solutions on hydrotalcite in the nitrate form has been investigated as a function of the Al/(Mg+Al) ratio. It was found that I− can replace only a small fraction of the nitrates in hydrotalcites and that I− sorption depends highly on Al/(Mg+Al) ratio.131I− was sorbed by anion exchange in the interlayer of hydrotalcite with an Al/(Mg+Al) ratio of 0.20 and, for higher ratios,131I− sorption increased more than 3 times. Hydrotalcites in the nitrate form were prepared using microwave irradiation in the hydrotreatment step. The radionuclide content was determined by Γ-spectrometry. Solids were characterized by BET, X-ray diffraction and atomic absorption analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02347218
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  • 8
    Electronic Resource
    Electronic Resource
    Removal of tritium labeled compounds from waste solutions by Sephadex, mineral coal and alumina (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 241 (1999), S. 113-122 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Organic waste solutions containing tritium present two problems: the high toxicity of the solvents and the radioactivity of tritium. In this paper the sorption behavior of the radioactivity of tritium from aqueous and organic waste solutions, containing tritium labeled compounds, was studied in Sephadex, mineral coal and alumina. It was found that the tritium retention depends on the composition of the waste solutions. Mineral coal was the best of the three materials studied to retain the organic compounds labeled with this radionuclide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02347297
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  • 9
    Electronic Resource
    Electronic Resource
    60Co sorption in zeolite 4A and effect of radiation (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 200 (1995), S. 19-23 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The potential uses of zeolites in the treatment of radioactive wastes may be conditioned to the physico-chemical properties of these materials. This work compares the Co sorption behavior of zeolite 4A and radiation treated zeolite 4A. Sorption experiments were performed with solutions containing labeled cobalt. No radiation effect (100 Mrad) in the zeolite structure or in the Co sorption behavior was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164817
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  • 10
    Electronic Resource
    Electronic Resource
    UO 2 2+ sorption on bentonite (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 218 (1997), S. 65-69 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The capacity of bentonite and purified bentonite to remove UO 2 2+ ions from aqueous solutions has been investigated. The UO 2 2+ uptake in these clays was determined for 0.2 and 0.002M uranyl nitrate solutions. It was found that under these conditions (0.2M) the maximum UO 2 2+ uptake was 1.010±0.070 meq UO 2 2+ /g of bentonite and 0.787±0.020 meq UO 2 2+ /g of purified bentonite. In purified bentonite UO 2 2+ sorption is irreversible up to 50 hours as no desorption was observed. Such is not the case in the natural bentonite. X-ray diffraction, thermal analyses, and transmission electron microscopy were used to characterize the solids. The uranium content was determined by neutron activation analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02033975
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