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M F Elkady - One of the best experts on this subject based on the ideXlab platform.
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kinetics study and thermodynamic behavior for removing cesium cobalt and nickel Ions from aqueous solutIon using nano zirconium vanadate Ion Exchanger
Desalination, 2011Co-Authors: M Abd M Ellatif, M F ElkadyAbstract:The goal of this batch-test kinetic study is to evaluate the effectiveness of the different prepared nano-zirconium vanadate Ion Exchangers for removing cesium, cobalt and nickel from aqueous solutIon. The prepared samples are characterized using X-ray diffractIon, Scanning Electron Microscope and Specific surface area. Analysis of the respective rate data in accordance with three kinetic models is applied. It is revealed that the kinetics of cesium sorptIon onto the different prepared inorganic nano-zirconium vanadate Ion Exchangers can be described well by the second-order and Elovich kinetic model. However, cobalt and nickel sorptIon kinetics may be described by the first, second-order and Elovich kinetic models. It is established that the Ion exchange mechanism plays a significant role in all studied cesium sorptIon systems and may participate with a small extent in the studied cobalt and nickel sorptIon systems. Moreover, the sorptIon systems are governed mainly by intraparticle diffusIon. Finally, nano-zirconium vanadate produced from homogeneous precipitatIon is selected for investigating the kinetic effect of the agitatIon speed and the solutIon temperature on the different three Ion removals. It is recognized that the activatIon energy and the thermodynamic parameters for the sorptIon systems of studied Ion removal using the homogeneous precipitated nano-zirconium vanadate Ion Exchanger are determined.
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synthesis characterizatIon and evaluatIon of nano zirconium vanadate Ion Exchanger by using three different preparatIon techniques
Materials Research Bulletin, 2011Co-Authors: M Abd M Ellatif, M F ElkadyAbstract:Abstract Sol–gel, homogeneous precipitatIon and hydrothermal synthesis are three different preparatIon techniques have been used as an attempt to synthesize nano-zirconium vanadate with properties suitable to be used as Ion Exchangers. The impact of the synthetic preparatIon variables such as the reactant concentratIons, reactIon temperature and reactIon time on the Ion exchange capacity of the produced Ion Exchanger has been considered for each preparatIon technique. One sample from each preparatIon technique having the largest Ion exchange capacity has been selected to be physically and chemically characterized using various analytical techniques such as XRD, TGA, DSC, pH titratIon, FTIR and SEM in order to determine the properties of the Ion Exchanger produced from each technique. For all the studied ZrV samples it can be presumed that they have the Ion exchange affinity sequences for alkali metal Ions K > Na > Li, the order for the alkaline earth metals is Ba > Ca > Mg and their affinity for radioactive metals follow Cs > Sr. Moreover, the prepared materials are of high thermal and radiatIon stabilities. Also they have high chemical stabilities toward wide concentratIon ranges of acid, basic as well as polar solvents. It has been deduced from the X-ray analysis that ZrV produced from the sol–gel technique has an amorphous structural. While those produced from the homogeneous precipitatIon and hydrothermal synthesis techniques, in the nano-scale have semi-crystalline structural. Furthermore, SEM confirms that particle size of the all studied prepared ZrV samples have nano-diameters of range 50–60 nm. Specific surface area of the three different prepared Ion Exchangers are found to be equal to 187, 192 and 320 m2/g for sol–gel, homogeneous precipitatIon and hydrothermal, respectively. A tentative structural formula of Zr(OH)2(HVO4)2·2H2O has been proposed for all studied samples on the basis of on FTIR, DSC and TGA results.
K. G. Varshney - One of the best experts on this subject based on the ideXlab platform.
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synthesis characterizatIon and analytical applicatIons of n dodecyl pyridinium chloride cerium iv phosphate fibrous Ion Exchanger selective for hg ii and its binary separatIons
Desalination and Water Treatment, 2015Co-Authors: Amita Somya, M Z A Rafiquee, K. G. Varshney, Hamad A AllohedanAbstract:AbstractAn intercalated hybrid fibrous Ion Exchanger has been synthesized by incorporating N-dodecyl pyridinium chloride with the inorganic catIon Exchanger, cerium (IV) phosphate. The synthesized, N-dodecyl pyridinium chloride-cerium (IV) phosphate (DPC-CeP) catIon Exchanger was characterized using X-ray diffractIon studies, SEM, thermogravimeric (and differential thermogravimetric) analysis and elemental analysis. The Ion-exchange characteristics (Ion-exchange capacity, elutIon and concentratIon behaviour) and thermal stability were also determined by usual chemical method. The adsorptIon studies for alkaline earths and heavy metal Ions on the synthesized material were also performed in different acidic media. DPC-CeP has been found to be selective for Hg(II) Ions. Hence, some binary separatIons of Hg(II) Ions from the mixture containing other metal Ions have been carried out on its column, exploring the potential role of the synthesized material in environmental studies and water treatment.
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pyridine based thorium iv phosphate hybrid fibrous Ion Exchanger synthesis characterizatIon and thermal behaviour
Journal of Thermal Analysis and Calorimetry, 2007Co-Authors: K. G. Varshney, A Agrawal, S C MojumdarAbstract:A new phase of the hybrid fibrous Ion Exchanger, pyridine based cerium(IV) phosphate (PyCeP), has been synthesized in the form of a sheet like paper by mixing ceric sulphate, phosphoric acid and pyridine in a particular ratio to get the material of the optimum Ion exchange characteristics. This material has been characterized with the help of Ion exchange capacity, elutIon and concentratIon and pH titratIons behaviour in additIon to some physicochemical studies like X-ray diffractIon, IR, TG, DTG and SEM studies. The SEM study confirms the fibrous nature of the material while amorphous nature is revealed by its X- ray spectrum.
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synthesis characterizatIon and analytical applicatIons of lead ii selective polyacrylonitrile thorium iv phosphate a novel fibrous Ion Exchanger
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2001Co-Authors: K. G. Varshney, Asif Ali Khan, Namrta Tayal, Ram NiwasAbstract:Abstract Some investigatIons on the preparative procedures of fibrous polyacrylonitrile thorium (IV) phosphate (PANThP) are reported. This new fibrous Ion Exchanger has been characterized on the basis of SEM and the Ion exchange studies. The distributIon studies reveal that the Exchanger is highly selective for Pb(II). On this basis some useful binary separatIons of Pb(II) from other metal Ions have been performed on its column indicating its useful environmental applicatIons.
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synthesis and Ion exchange behaviour of polyaniline sn iv arsenophosphate a polymeric inorganic Ion Exchanger
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1999Co-Authors: Ram Niwas, Asif Ali Khan, K. G. VarshneyAbstract:IncorporatIon of a polymer material into an inorganic Ion Exchanger provides a class of hybrid Ion Exchangers with a good Ion exchange capacity, high stability, reproducibility and selectivity for heavy metals. Such a type of Ion Exchanger ‘polyaniline Sn(IV) arsenophosphate’ has been synthesized by mixing polyaniline into inorganic material. This material is characterized using X-ray, IR, TGA studies in additIon to Ion exchange capacity, pH-titratIon, elutIon and distributIon behaviour. On the basis of distributIon studies, the material has been found to be highly selective for Pb(II). Kinetic study of exchange for the metal Ions has been performed and some physical parameters such as self diffusIon coefficient D0, energy Ea and entropy ΔS* of activatIon have been determined.
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acrylonitrile based cerium iv phosphate as a new mercury selective fibrous Ion Exchanger synthesis characterizatIon and analytical applicatIons
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1998Co-Authors: K. G. Varshney, Namrta Tayal, Upma GuptaAbstract:Abstract Acrylonitrile based cerium (IV) phosphate has been synthesized as a new fibrous Ion-Exchanger. It has been characterized using X-ray, IR, TGA and DTG studies in additIon to its Ion-exchange capacity, elutIon behaviour, pH titratIon and distributIon behaviour. SeparatIon factors and Kd values for various metal Ions have also been determined and a marked selectivity for Hg2+ has been found. As a consequence, some binary separatIons of metal Ions have been performed on a column of this material, demonstrating its analytical potential.
Joseph A Hriljac - One of the best experts on this subject based on the ideXlab platform.
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utilisatIon of a hydrogen uranyl phosphate based Ion Exchanger supported on a biofilm for the removal of cobalt strontium and caesium from aqueous solutIons
Hydrometallurgy, 2006Co-Authors: Marion Patersonbeedle, Lynne E. Macaskie, Joseph A HriljacAbstract:Abstract The problems of nuclear waste treatment and decontaminatIon have been paramount for a number of years and continue to adversely affect the acceptability and expanded uses of nuclear power. By and large, methodologies for waste treatment exist at varying efficiency and correspondingly high expense. With a view to nuclear waste remediatIon, a novel bio-inorganic Ion Exchanger was developed which utilises a microbial system to synthesise hydrogen uranyl phosphate which serves as an intercalative Ion Exchanger for the fissIon products 137 Cs, 90 Sr and the activatIon product 60 Co. Hydrogen uranyl phosphate-coated Serratia sp. biofilm, immobilised onto polyurethane reticulated foam, was used in a flow through reactor, with complete substitutIon of H + in the matrix by the intercalating target metal species. Experiments carried out in South Korea have confirmed these results using test nuclides ( 137 Cs, 85 Sr and 60 Co), as well as water from a pool, where spent fuels are stored and cooled, sited in a post irradiatIon examinatIon facility at the Korea Atomic Energy Research Institute. Over 97% and ∼ 85% removal of 137 Cs and 60 Co, respectively, from the pool water were reported, at a flow residence time of 7 days.
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UtilisatIon of a hydrogen uranyl phosphate-based Ion Exchanger supported on a biofilm for the removal of cobalt, strontium and caesium from aqueous solutIons
Hydrometallurgy, 2006Co-Authors: Marion Paterson-beedle, K. Y. Jee, C.-h. Lee, Joseph A Hriljac, Lynne E. Macaskie, W H KimAbstract:The problems of nuclear waste treatment and decontaminatIon have been paramount for a number of years and continue to adversely affect the acceptability and expanded uses of nuclear power. By and large, methodologies for waste treatment exist at varying efficiency and correspondingly high expense. With a view to nuclear waste remediatIon, a novel bio-inorganic Ion Exchanger was developed which utilises a microbial system to synthesise hydrogen uranyl phosphate which serves as an intercalative Ion Exchanger for the fissIon products137Cs,90Sr and the activatIon product60Co. Hydrogen uranyl phosphate-coated Serratia sp. biofilm, immobilised onto polyurethane reticulated foam, was used in a flow through reactor, with complete substitutIon of H+in the matrix by the intercalating target metal species. Experiments carried out in South Korea have confirmed these results using test nuclides (137Cs,85Sr and60Co), as well as water from a pool, where spent fuels are stored and cooled, sited in a post irradiatIon examinatIon facility at the Korea Atomic Energy Research Institute. Over 97% and ∼ 85% removal of137Cs and60Co, respectively, from the pool water were reported, at a flow residence time of 7 days. © 2006 Elsevier B.V. All rights reserved.
M Abd M Ellatif - One of the best experts on this subject based on the ideXlab platform.
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kinetics study and thermodynamic behavior for removing cesium cobalt and nickel Ions from aqueous solutIon using nano zirconium vanadate Ion Exchanger
Desalination, 2011Co-Authors: M Abd M Ellatif, M F ElkadyAbstract:The goal of this batch-test kinetic study is to evaluate the effectiveness of the different prepared nano-zirconium vanadate Ion Exchangers for removing cesium, cobalt and nickel from aqueous solutIon. The prepared samples are characterized using X-ray diffractIon, Scanning Electron Microscope and Specific surface area. Analysis of the respective rate data in accordance with three kinetic models is applied. It is revealed that the kinetics of cesium sorptIon onto the different prepared inorganic nano-zirconium vanadate Ion Exchangers can be described well by the second-order and Elovich kinetic model. However, cobalt and nickel sorptIon kinetics may be described by the first, second-order and Elovich kinetic models. It is established that the Ion exchange mechanism plays a significant role in all studied cesium sorptIon systems and may participate with a small extent in the studied cobalt and nickel sorptIon systems. Moreover, the sorptIon systems are governed mainly by intraparticle diffusIon. Finally, nano-zirconium vanadate produced from homogeneous precipitatIon is selected for investigating the kinetic effect of the agitatIon speed and the solutIon temperature on the different three Ion removals. It is recognized that the activatIon energy and the thermodynamic parameters for the sorptIon systems of studied Ion removal using the homogeneous precipitated nano-zirconium vanadate Ion Exchanger are determined.
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synthesis characterizatIon and evaluatIon of nano zirconium vanadate Ion Exchanger by using three different preparatIon techniques
Materials Research Bulletin, 2011Co-Authors: M Abd M Ellatif, M F ElkadyAbstract:Abstract Sol–gel, homogeneous precipitatIon and hydrothermal synthesis are three different preparatIon techniques have been used as an attempt to synthesize nano-zirconium vanadate with properties suitable to be used as Ion Exchangers. The impact of the synthetic preparatIon variables such as the reactant concentratIons, reactIon temperature and reactIon time on the Ion exchange capacity of the produced Ion Exchanger has been considered for each preparatIon technique. One sample from each preparatIon technique having the largest Ion exchange capacity has been selected to be physically and chemically characterized using various analytical techniques such as XRD, TGA, DSC, pH titratIon, FTIR and SEM in order to determine the properties of the Ion Exchanger produced from each technique. For all the studied ZrV samples it can be presumed that they have the Ion exchange affinity sequences for alkali metal Ions K > Na > Li, the order for the alkaline earth metals is Ba > Ca > Mg and their affinity for radioactive metals follow Cs > Sr. Moreover, the prepared materials are of high thermal and radiatIon stabilities. Also they have high chemical stabilities toward wide concentratIon ranges of acid, basic as well as polar solvents. It has been deduced from the X-ray analysis that ZrV produced from the sol–gel technique has an amorphous structural. While those produced from the homogeneous precipitatIon and hydrothermal synthesis techniques, in the nano-scale have semi-crystalline structural. Furthermore, SEM confirms that particle size of the all studied prepared ZrV samples have nano-diameters of range 50–60 nm. Specific surface area of the three different prepared Ion Exchangers are found to be equal to 187, 192 and 320 m2/g for sol–gel, homogeneous precipitatIon and hydrothermal, respectively. A tentative structural formula of Zr(OH)2(HVO4)2·2H2O has been proposed for all studied samples on the basis of on FTIR, DSC and TGA results.
R K Patel - One of the best experts on this subject based on the ideXlab platform.
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removal of lead ii from aqueous environment by a fibrous Ion Exchanger polycinnamamide thorium iv phosphate
Journal of Hazardous Materials, 2009Co-Authors: Mahamudur Islam, R K PatelAbstract:Abstract The objective of the present research was to synthesize, characterize and to investigate the removal efficiency of lead (II) Ion from synthetic lead solutIon by a hybrid fibrous Ion Exchanger. In the present study polycinnamamide thorium (IV) phosphate was synthesized by co-precipitatIon method and was characterized using SEM, XRD, FTIR and TGA–DSC. To know the practical applicability, a detailed removal study of lead Ion was carried out using the material. The removal of lead was 81.2% under optimum conditIons. AdsorptIon kinetic study revealed that the adsorptIon process followed first order kinetics. AdsorptIon data were fitted to linearly transformed Langmuir isotherm with R2 (correlatIon coefficient) >0.99. Thermodynamic parameters were also calculated to study the effect of temperature on the removal process. In order to understand the adsorptIon type, equilibrium data were tested with Dubinin–Radushkevich isotherm.
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polyacrylamide thorium iv phosphate as an important lead selective fibrous Ion Exchanger synthesis characterizatIon and removal study
Journal of Hazardous Materials, 2008Co-Authors: Mahamudur Islam, R K PatelAbstract:Abstract The objective of the present research was to synthesize, characterize and to investigate the removal efficiency of lead (II) Ion from synthetic lead solutIon by a hybrid fibrous Ion Exchanger. In the present study polyacrylamide thorium (IV) phosphate was synthesized by co-precipitatIon method and was characterized using SEM, XRD, FTIR and TGA–DSC. To know the practical applicability, a detailed removal study of lead Ion was carried out. The removal of lead was 52.9% under neutral conditIon, and using 0.4 g of adsorbent in 100 mL of lead solutIon having initial concentratIon of 100 mg/L. AdsorptIon kinetic study revealed that the adsorptIon process followed first order kinetics. AdsorptIon data were fitted to linearly transformed Langmuir isotherm with R2 (correlatIon coefficient) > 0.99. Thermodynamic parameters were also calculated to study the effect of temperature on the removal process. In order to understand the adsorptIon type, equilibrium data were tested with Dubinin–Radushkevich isotherm. The percentage removal was found to increase gradually with increase in pH and 99% removal was achieved at pH 10. The process was rapid and equilibrium was established within first 30 min.
