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  • Chemistry  (14)
  • ddc:330
  • Florida Geological Survey  (7)
  • Islamic Azad University, Science and Research Branch, Tehran, Marine Chemistry  (7)
  • 2020-2022  (14)
  • 1980-1984
  • 1975-1979
  • 1
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    Evaluation and measurement of chromium in sea water in order to remove it with mineral absorbent kaolin for desalination (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Chemistry
    In:  http://aquaticcommons.org/id/eprint/21055 | 17408 | 2016-10-10 10:02:44 | 21055 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Today, the use of heavy metals and chemical products industry expanded. The presence of significant amounts of, pollutants in industrial waste water can lead to serious risks to the environment and human health have heavy metals like chromium is one example of the future of salmon knock pond environment. Chromium is an essential element in the diet, but high doses of this element is very dangerous. Hence the use of chemical methods as a tool for the removal of metals from waste water pond be used. The aim of this study was to investigate the mineral kaolin adsorbents for the removal of chromium is water. Thus, the effect of different concentrations of absorbent micro amounts of chromium absorption and variable temperature, pH and electrolytes were studied. During the investigation of spectroscopic instrument (Varian) UV-VIS are used. Comparison of the absorption mechanism of chromium adsorption by the adsorbent with nano-absorbent kaolin kaolin was investigated. According to the studies done in the same conditions of temperature, pH and shaking rate of chromium absorption by nano kaolin kaolin is much more attractive. Therefore, its use as an adsorbent abundant, cheap, accessible, efficient and effective is proposed.
    Description: Masters
    Description: Advisors:Mohammad Ebrahim, Olya;Mohammad Hadi, Khorgami Counsellor:Shahram, Moradi
    Keywords: Aquaculture ; Chemistry ; Pollution
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
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  • 2
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    Preparation of Ni-P electroless and its corrosion resistance against sea water (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Chemistry
    In:  http://aquaticcommons.org/id/eprint/21056 | 17408 | 2016-10-12 07:31:33 | 21056 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Electroless coating is much appropriate process at engineering surface. Since the discovery of electroless nickel-phosphorus coating in 3996, due to technical and economic advantages as well as desirable characteristics such as resistance to corrosion, abrasion and a high hardness has found wide application at engineering industries. Properties of electroless nickel-phosphorus coating depend on the characteristics of the used bath and heat treatment. In this study, optimal conditions and concentration of sodium citrate, sodium acetate and lactic acid in the bath of electroless nickel-phosphorus coating to the steel ck67 surface was determined. Structure, chemical composition and phases occurring in the coating were investigated using Scanning Electron Microscope (SEM) and X-ray diffraction analysis (XRD). The corrosion behavior of coatings in solution 3.5٪ NaCl was studied using electrochemical. The results showed that corrosion resistance of the coating with composition sodium citrate, sodium acetate and lactic acid decreased respectively.
    Description: Masters
    Description: Advisors:H. Moddares. Counsellors: A. Mashinchian Moradi
    Keywords: Chemistry ; Environment
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
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  • 3
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    Investigation on water and sediment quality variation from coast to off shore and its relation to bent hoses biodiversity: case study Bandar tahery (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Chemistry
    In:  http://aquaticcommons.org/id/eprint/21065 | 17408 | 2016-10-13 07:47:55 | 21065 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: This paper deals with the qualification of water and sediment particularly those of benthos, as well as their interaction results, through careful laboratory researches within 24 experimental sites around the bank of Bandar Taheri, Persian Gulf water of Iranian borders, under 13th phase south Pars project. Samples were carried to the laboratories and careful experimental tests such as physical chemical, heavy metal, nitrate ammoniac, toc and other biologic tests including various type of benthos count were performed. Data gained through Shanon and Dankan statistical analyses were also studied to determine the water, sediment and pollution rate. Resulted information would classify the area as less polluted area which is rather away from critical environmental zone, another word the area could be liable to change to an undesired one while the density rates of principal metals follows the Fe〉Mn〉Zn〉Cu〉Pb〉Cd〉N pattern.
    Description: Masters
    Description: Advisors: A. H., Javid; A., Mashincian Moradi; Counsellors: P., Ghavam Mostafavi
    Keywords: Chemistry ; Pollution
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
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  • 4
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    Studying and measuring the amount of detergents in sea-water samples in order to eliminate with adsorbents and inorganic nano-adsorbents for the sake of securing the water for marine nourishment pools (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Chemistry
    In:  http://aquaticcommons.org/id/eprint/21066 | 17408 | 2016-10-13 07:51:42 | 21066 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Increasing the amount of detergent industries in world in spite of having abundant benefits; entering a new kind of contamination into environment and attract the attention of environment liable of different countries to itself. Entering detergents into an aqueous solution cause pollution of water sources and environment in respect of appearing e problem and charges like: nutritive phenomenon, decomposition of hard group of detergent and producing foam. After using Detergents, they were poured into rivers, seas and lakes and have destructive effect on environment. A lot of hygiene problems were attributed to the water having detergents more than allowed value. So, it is specified the importance of eliminating detergents from contaminated water and it is application for secondary use. In order to attain to this aim, we can use inorganic nano and micro-caolin. In this study the adsorptive properties of detergent on the micro and nano caolin adsorbents were studied and the effect of various parameters like the amount of adsorptive materials, initial concentration of detergent, speed of stirring, electrolyte, temperature, time and pH were determined. The surface area of micro- and nano-caoline was reported 11.867 and 49.1438 m2 g-1, respectively. That increasing in nano-caoline surface area confirms increasing in capacity and more rate of adsorption. The results gained by this research recommend using micro- and nano-caolin as a plentiful, available and effective adsorbents. Also in comparison, using nano-caoline was recommended in order to have more effectiveness.
    Description: Masters
    Description: Advisors: Mohammad Hadi, Khorgami; Mohammad Ebrahim, Olia Counsellor: Parviz, Aberomand Azar
    Keywords: Chemistry ; Oceanography
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
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  • 5
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    Application of chitosan loaded with metal oxide nano particles to remove lead present from sea water (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Chemistry
    In:  http://aquaticcommons.org/id/eprint/21064 | 17408 | 2016-10-13 07:43:09 | 21064 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Chitosan is a natural polymer obtained by deacetylation of chitin. After cellulose chitin is the second most abundant polysaccharide in nature. It is biologically safe, non-toxic, biocompatible and biodegradable polysaccharide. Chitosan loaded with zinc oxide nanoparticles have gained more attention bio sorbent because of their better stability, low toxicity, simple and mild preparation method and high sorption capacity. Chitosan loaded with zinc oxide nanoparticles have been prepared of chitosan. The physicochemical properties of nanoparticles were characterized by Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM) Analysis. Its sorption capacity for lead and cadmium ions studied. Factors such as initial concentration of lead ions, cadmium ions sorbent amount, contact time, pH and temperature were investigated. It is found that chitosan loaded with zinc oxide nanoparticles could sorb lead and cadmium ions effectively, this sorption rate was affected significantly by initial concentration of lead and cadmium ions, sorbent amount, contact time, pH of solution. The maximum of percentage of lead sorption was 98 % with initial concentration 3 mg/l and sorbent amount 0.05 g, pH 11 in 45 min and cadmiumwas90 %with initial concentration 3mg/l and sorbent amount 0.05 g, pH 11 in45 min. Consequently chitosan loaded with zinc oxide nanoparticles demonstrated greater fixation ability for lead ions than cadmium ions.
    Description: Masters
    Description: Advisors: Shahram, Morady; Counsellors: Parviz, Aberoomand Azar
    Keywords: Chemistry ; Pollution
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
    Format: application/pdf
    Format: 106
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  • 6
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    Resistance of an epoxy coating with an organic inhibitor to cathodic disbondment in sea water (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Chemistry
    In:  http://aquaticcommons.org/id/eprint/21069 | 17408 | 2016-10-13 08:02:36 | 21069 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: In this study, the effect of anti-corrosion inhibitor addition to epoxy coating, on the disbanding rate was evaluated. First to determination of mechanism, the bare steel substrates were immersed in the 3.5% NaCl solution and the solution containing 1 mM anti corrosion. The Electrochemical Impedance Spectroscopy was performed after 5 and 24 hour. The results indicated a lower corrosion rate in the presence of inhibitor. During the time, charge transfer resistance, was decreased for the substrates immersed in NaCl solution, and increased for the substrates immersed in NaCl solution containing 1 mM anti corrosion. This result can be related to more stability of corrosion products in presence of anti-corrosion and film formation. The coated substrates, with four different concentration of anticorrosion in coating, were protected under -1.2 voltage in the 3.5% NaCl solution. After 12 and 24 hour, the EIS test and disbanding area measurement, were evaluate. The lower disbanding rate, more charge transfer resistance and less double layer capacitance for the coating containing 0.75w% inhibitor, were observed. The result of Pull-off test after 1 day immersion in 3.5% NaCl solution, showed more wet adhesion for the coating containing 0.75w% inhibitor. The images of FE-SEM electron microscope and surface analyses EDX on the coated substrate after disbanding and the bare substrate immersed in 3.5w% NaCl containing 1 mM inhibitor, were proved the formation of stabilized film.
    Description: Masters
    Description: Advisors: R. Naderie Mahmoudi; M. Sayebani; Counsellor: A. Mashinchian Moradi
    Keywords: Chemistry ; Pollution
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
    Format: application/pdf
    Format: 67
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  • 7
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    Fabrication and optimizing of metal nano silicate as toxic metal absorbent from sea water (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Chemistry
    In:  http://aquaticcommons.org/id/eprint/21067 | 17408 | 2016-10-13 07:55:25 | 21067 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Pure Water, is a crucial demand of creature life. Following industrial development, extra amount of toxic metals such as chromium enters the environmental cycle through the sewage, which is considered as a serious threat for organisms. One of the modern methods of filtration and removal of contaminants in water, is applying Nano-technology. According to specific property of silicate materials, in this article we try to survey increased power in composites and various absorption in several morphologies and also synthesis of Nano-metal silicates with different morphologies as absorbent of metal toxic ions. At first, we synthesize nano zink silicate with three morphologies considering context and the purpose of this survey. 1) Nano synthesis of zink silicate hollow cavity by hydrothermal method in mixed solvent system of ethanol/glycol polyethylene. 2) Zink nano wires silicate in a water-based system by controlling the amount of sodium silicate. 3) Synthesis of nano zink silicate membrane. After synthesizing, we measured the cadmium ion absorbance by synthesized nano zink silicates. Controlling PH, is the applied absorption method. Next step, we synthesized nano zink-magnesium silicate composite in two various morphologies of nanowires and membrane by different precent of zink and magnesium, in order to optimize synthesized nano metal silicate. We used zink nitrate and magnesium nitrate and also measured cadmium absorptionby synthesized nano metal silicates in the same way of PH control absorption. In the 3rd step, in order to determine the impact of the type of metal in nano metal silicate, we synthesized nano magnesium silicate and compared its absorption with nano zink silicate. Furthermore, we calculated the optimal concentration in one of synthesizes. Optimal concentration is the process which has the maximum absorption. While applying two methods of absorption in the test, finally we compared the effect of absorption method on the absorption level. Below you find further steps of synthesis: 1) Using IR, RAMAN, XRD spectroscopy to check the accuracy of synthesis. 2) Checking the dispersion of nano particles in ethanol solution by light microscope. 3) Measuring and observing particles with scanning electron microscope (SEM). 4) Using atomic absorption device for measuring the cadmium concentration in water-based solutions. The nano metal silicates were synthesized successfully. All of synthesized nano absorbents have the cadmium ion absorbency. The cadmium absorption via nano absorbents depend on various factors such as kind of metal in nano silicate and percent of metal in nano metal silicate composite. Meanwhile the absorption and PH control of medium containing the absorbent and solution would affect the cadmium absorption.
    Description: Masters
    Description: Advisors: Moradi, Shahram; Counsellor: Abroomand, Parviz
    Keywords: Chemistry ; Environment
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
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  • 8
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    Flow and chemical characteristics of the St. Johns River at Jacksonville, Florida (2021)
    Florida Geological Survey | Tallahassee, FL
    In:  http://aquaticcommons.org/id/eprint/1212 | 3 | 2011-09-29 20:58:52 | 1212 | Florida Geological Survey
    Details
    Publication Date: 2021-07-06
    Description: This report will be of substantial value to water managers in developing theSt. Johns River as a multiple resource. Evaluation of the capacity of the river toaccept pollutants without adversely affecting other uses requires detailed data offlow and chemical characteristics and an understanding of how they interact. (66 page document)
    Keywords: Limnology ; Chemistry ; Planning ; pollutants ; St. Johns River ; Florida ; water quality
    Repository Name: AquaDocs
    Type: monograph
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  • 9
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    Test well exploration in the Myakka River Basin area, Florida (2021)
    Florida Geological Survey | Tallahassee, FL
    In:  http://aquaticcommons.org/id/eprint/1335 | 3 | 2011-09-29 20:44:07 | 1335 | Florida Geological Survey
    Details
    Publication Date: 2021-07-07
    Description: In recent years, difficulties encountered in obtaining ground-water supplieswith acceptable chemical characteristics in the Myakka River basin area led tothe implementation of a test drilling program. Under this program, well drillingand data collection were executed in such a manner that all water-producingzones of the local aquifers, together with the quality and quantity of the wateravailable, were effectively identified.A step-drilling method was utilized which allowed the collection offormation cuttings, water samples, and water-level data, from isolated zones inthe well as drilling proceeded. The step drilling procedure is described. Thedriller's logs, geophysical logs, and chemical quality of water tables arepresented.(Document has 66 pages.)
    Keywords: Engineering ; Limnology ; Chemistry ; water supply ; groundwater ; Myakka River Basin area ; Florida
    Repository Name: AquaDocs
    Type: monograph
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  • 10
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    Ground-water resources data of Charlotte, DeSoto, and Hardee Counties, Florida (2021)
    Florida Geological Survey | Tallahassee, FL
    In:  http://aquaticcommons.org/id/eprint/1336 | 3 | 2011-09-29 20:44:11 | 1336 | Florida Geological Survey
    Details
    Publication Date: 2021-07-07
    Description: Charlotte, De Soto, and Hardee counties are east-southeast ofTampa in west-central peninsular Florida, figure 1. In order toplan the future water-resource development of the area, informationabout the water resources is needed. To meet this need, the WaterResources Division of the U.S. Geological Survey, in cooperationwith the Peace River Basin Board of the Southwest Florida WaterManagement District as part of the statewide cooperative programwith the Division of Geology, Florida Board of Conservation, begana continuing hydrologic data collection program in July, 1963, asan initial step in the investigation and evaluation of the groundwaterresources of Hardee and De Soto counties. A similar hydrologicdata program commenced in Charlotte County in July, 1964.Previous work in Hardee and De Soto counties included aone year reconnaissance by the Division of Water Resources andConservation, Florida Board of Conservation, which concluded inJune, 1963, and resulted in a hydrologic report (Woodard, 1964).As an outgrowth of the hydrologic data program, a Map Seriesreport portraying the chemical character of water in the Floridanaquifer in the southern Peace River basin was prepared in 1967(Kaufman and Dion).The data contained herein constitute the basis for the MapSeries report. Additional selected data, including records of wellsand chemical analyses,, on the ground-water resources of the threecounty area are also included and are published to make the dataavailable.(Document has 28 pages.)
    Description: Prepared by the UNITED STATES GEOLOGICAL SURVEY in cooperation with the DIVISION OF GEOLOGY FLORIDA BOARD OF CONSERVATION and the SOUTHWEST FLORIDA WATER MANAGEMENT DISTRICT
    Keywords: Engineering ; Limnology ; Chemistry ; groundwater ; Charlotte County ; DeSoto County ; Hardee County ; Florida
    Repository Name: AquaDocs
    Type: monograph
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  • 11
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    Water resource records of the Econfina Creek Basin area, Florida (2021)
    Florida Geological Survey | Tallahassee, FL
    In:  http://aquaticcommons.org/id/eprint/1337 | 3 | 2011-09-29 20:44:17 | 1337 | Florida Geological Survey
    Details
    Publication Date: 2021-07-07
    Description: The Econfina Creek basin area in northwestern Florida, which includes BayCounty, southeastern Washiigton County, and parts of Calhoun, Gulf, andJackson counties is shown in figure 1. The basin has an abundant supply ofground water and surface water of good quality. This determination is based ona three-year investigation of the water resources of the basin by the U. S.Geological Survey in cooperation with the Division of Geology, Florida Board ofConservation, during the period from October 1961 through June 1964. Thepurpose of this report is to assemble the basic data collected during thisinvestigation for those persons interested in water development or managementin this basin.(Document has 131 pages.)
    Description: Prepared by the United States Geological Suvey in cooperation with the Division of Geology, Florida Board of Conservation
    Keywords: Engineering ; Limnology ; Chemistry ; Water quality ; Econfina Creek ; Florida
    Repository Name: AquaDocs
    Type: monograph
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  • 12
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    Karst [poster] (2021)
    Florida Geological Survey | Tallahassee, FL
    In:  http://aquaticcommons.org/id/eprint/649 | 3 | 2011-09-29 21:45:02 | 649 | Florida Geological Survey
    Details
    Publication Date: 2021-07-01
    Description: Florida’s geology allows for the creation of many interesting featuresincluding sinkholes, underground rivers, springs, and caves. Thesefeatures make up what is called karst topography which forms as flowingwater slowly dissolves the limestone and dolostone. (1 poster)
    Description: Karst Educational Posters
    Keywords: Atmospheric Sciences ; Limnology ; Earth Sciences ; Chemistry ; karst ; springs ; sinkholes ; Florida ; charts
    Repository Name: AquaDocs
    Type: monograph
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  • 13
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    Water-resource records of Brevard County, Florida (2021)
    Florida Geological Survey | Tallahassee, FL
    In:  http://aquaticcommons.org/id/eprint/639 | 3 | 2020-08-24 02:23:46 | 639 | Florida Geological Survey
    Details
    Publication Date: 2021-07-01
    Description: The U. S. Geological Survey made a comprehensiveinvestigation of the water resources of Brevard Countyfrom 1954 to 1958. The purposes of this investigation were:(1) to determine the occurrence and chemical quality ofwater in the streams and lakes, (2) to determine the locationand the thickness of aquifers, and (3) to determine theoccurrence and chemical quality of the ground water. Duringthe period from 1933 to 1954, water records were collectedfrom a few stream-gaging stations and a few observationwells. The purpose of this report is to present basic datacollected during these investigations. (Document has 188 pages.)
    Keywords: Limnology ; Earth Sciences ; Chemistry ; water quality ; streams ; lakes ; aquifers ; Brevard County ; Florida
    Repository Name: AquaDocs
    Type: monograph
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  • 14
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    Florida's ground water quality monitoring program: background hydrogeochemistry (2021)
    Florida Geological Survey | Tallahassee, FL
    In:  http://aquaticcommons.org/id/eprint/1307 | 3 | 2011-09-29 20:49:55 | 1307 | Florida Geological Survey
    Details
    Publication Date: 2021-07-07
    Description: The purpose of this report is to present theresults of the initial quantification of backgroundwater quality in each of the state's major potableaquifer systems. Results are presented andinterpreted in light of the influencing factors whichlocally and regionally affect ambient ground-waterquality. This initial data will serve as a baselinefrom which future sampling results can becompared. Future sampling of the Network willindicate the extent to which Florida's regionalground-water resources are improving or decliningin quality. (Document has 378 pages.)
    Keywords: Limnology ; Chemistry ; Florida ; groundwater ; monitoring ; geochemistry
    Repository Name: AquaDocs
    Type: monograph
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