The Experts below are selected from a list of 11418 Experts worldwide ranked by ideXlab platform
Syed Ashfaq Nabi - One of the best experts on this subject based on the ideXlab platform.
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EDTA-stannic(IV)iodate: preparation, characterization and its analytical appliCations for metal content determination in real and synthetic samples
Journal of Porous Materials, 2009Co-Authors: Syed Ashfaq Nabi, Aabid H. ShallaAbstract:A new organic–Inorganic Cation exchanger EDTA-stannic(IV)iodate was synthesized. The materials possess good chemical and thermal stability. The exchanger was characterized on the basis of X-ray, TGA, FTIR, UV–Visible spectrophotometery and SEM studies. ion exchange capacity, pH titration, elution and distribution studies were also carried out to determine the primary ion exchange properties of the material. The SEM study confirms the fibrous nature of the material. The exchanger behaves as a monofunctional Cation exchanger with ion exchange capacity of 1.30 meq/g for Na^+ ions. The material can perform well upto the temperature of 500 °C and retains the 76.4% of ion exchange capacity. The material is fairly stable in dilute solutions of some common mineral acids, bases and organic solvents. The differential selectivity of metal ions on EDTA-stannic(IV)iodate has been utilized to perform analytically and industrially important binary separations.
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synthesis and characterization of a new organic Inorganic pb2 selective composite Cation exchanger acrylonitrile stannic iv tungstate and its analytical appliCations
Chemical Engineering Journal, 2009Co-Authors: Syed Ashfaq Nabi, Mu Naushad, Rani BushraAbstract:A new polymeric–Inorganic Cation exchanger acrylonitrile stannic(IV) tungstate composite was synthesized by sol–gel technique by incorporating stannic(IV) tungstate precipitate with acrylonitrile. Composite materials formed by the combination of Inorganic ion exchangers of multivalent metal acid salts and organic polymers (acrylonitrile, cellulose acetate, polyaniline, polypyrrole, polythiophene, etc.), providing a new class of ‘organic–Inorganic’ composite exchangers with better mechanical and granulometric properties, good ion exchange capacity, higher stability, reproducibility and selectivity for heavy metals. The physico-chemical characterization was carried out by elemental analysis, TGA, SEM, XRD, FTIR and TEM studies. Ion exchange capacity, pH titrations, elution and distribution behavior were also carried out to understand the ion exchange behavior of the material. The adsorption behavior of heavy metal ions has been reported in nitric acid and two surfactants media by batch processes. The analytical appliCations of the material have been explored by achieving some analytically important binary separations from aqueous solution on its columns. The practical applicability of acrylonitrile stannic(IV) tungstate was demonstrated in the quantitative separation of Fe3+and Zn2+ contents of a commercially available pharmaceutical sample namely Fefol-Z.
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synthesis characterization and analytical appliCations of titanium iv molybdosilicate a Cation ion exchanger
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Syed Ashfaq Nabi, Aabid H. Shalla, Amjad Mumtaz Khan, Sajad A GanieAbstract:Abstract A new Inorganic Cation exchanger titanium(IV) molybdosilicate has been synthesized. The effect of experimental parameters such as mixing ratio of reagents, temperature, and pH on the properties of material has been studied. The material was characterized on the basis of chemical composition, thermal and chemical stability, X-ray diffraction, FTIR, TGA and SEM studies. The exchanger behaves as a monofunctional acid in alkali systems and bifunctional in alkaline earth system. The Cation exchange capacity for Na + was found to be 0.74 mequiv./g ions. The adsorption behavior of metal ions in different solvent systems namely acetic acid, formic acid, dimethylsulfoxide, phenol, triton, formamide and dimineralized water has been studied. The analytical appliCations of the material have been explored by achieving some binary as well as ternary separations from aqueous solution on its columns. In order to demonstrate analytical utility of titanium(IV) molybdosilicate, quantitative separation of Fe 3+ and Zn 2+ contents of a commercially available pharmaceutical sample viz Fefol-Z has been performed on its column.
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synthesis and characterization of a new Inorganic Cation exchanger zr iv tungstomolybdate analytical appliCations for metal content determination in real sample and synthetic mixture
Journal of Hazardous Materials, 2007Co-Authors: Syed Ashfaq Nabi, Mu NaushadAbstract:Abstract An amorphous sample of Inorganic Cation-exchanger Zr(IV) tungstomolybdate was prepared by mixing varying ratios of 0.1 M aqueous solution of sodium tungstate and 0.1 M aqueous solution of sodium molybdate into 0.1 M aqueous solution of zirconium oxychloride at pH 1. This Cation-exchanger was found to have a good ion-exchange capacity (2.40 mequiv. g−1 for Na+), high thermal and chemical stability. A tentative structural formula was proposed on the basis of chemical composition, FTIR and thermogravimetric analysis. Distribution coefficients (Kd) values of metal ions in various solvent systems were determined. Some important and analytically difficult quantitative binary separations viz. Ni(II)–Pb(II), Ni(II)–Zn(II), Ni(II)–Cd(II), Mg(II)–Al(III), etc. were achieved. The practical applicability of the Cation-exchanger was demonstrated in the separation of Cu(II)–Zn(II) from a synthetic mixture as well as from real samples of pharmaceutical formulation and brass alloy.
G Bagheri - One of the best experts on this subject based on the ideXlab platform.
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synthesis characterization and analytical appliCation of a new Inorganic Cation exchanger titanium iv molybdophosphate
Talanta, 2009Co-Authors: R Yavari, S J Ahmadi, Yarong Huang, G Bagheri, Ali Reza Khanchi, J. M. HeAbstract:Abstract A novel polyoxometalate-Cation exchanger, titanium(IV) molybdophosphate (TMP) has been synthesized under varying conditions. The material was characterized by X-ray diffraction, infrared spectroscopy, inductively coupled plasma and thermogravimetry techniques. Its stability was investigated in water, dilute acids, alkaline solutions, and high temperature up to 750 °C. Ion-exchange capacity and distribution coefficients (Kd) for twenty-nine radionuclides and metal ions have been determined. It was found that the TMP has high affinity for Cs+, Sr2+, UO22+, Ba2+, Pb2+, Tl+, Zn2+, Rb2+ and Zr4+ ions. The results of binary separation of metal ions showed that TMP can be potentially useful for analytical appliCations.
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synthesis characterization and analytical appliCation of a new Inorganic Cation exchanger titanium iv molybdophosphate
Talanta, 2009Co-Authors: R Yavari, S J Ahmadi, Yarong Huang, Ali Reza Khanchi, G BagheriAbstract:A novel polyoxometalate-Cation exchanger, titanium(IV) molybdophosphate (TMP) has been synthesized under varying conditions. The material was characterized by X-ray diffraction, infrared spectroscopy, inductively coupled plasma and thermogravimetry techniques. Its stability was investigated in water, dilute acids, alkaline solutions, and high temperature up to 750 degrees C. Ion-exchange capacity and distribution coefficients (K(d)) for twenty-nine radionuclides and metal ions have been determined. It was found that the TMP has high affinity for Cs(+), Sr(2+), UO(2)(2+), Ba(2+), Pb(2+), Tl(+), Zn(2+), Rb(2+) and Zr(4+) ions. The results of binary separation of metal ions showed that TMP can be potentially useful for analytical appliCations.
R Yavari - One of the best experts on this subject based on the ideXlab platform.
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synthesis characterization and analytical appliCation of a new Inorganic Cation exchanger titanium iv molybdophosphate
Talanta, 2009Co-Authors: R Yavari, S J Ahmadi, Yarong Huang, G Bagheri, Ali Reza Khanchi, J. M. HeAbstract:Abstract A novel polyoxometalate-Cation exchanger, titanium(IV) molybdophosphate (TMP) has been synthesized under varying conditions. The material was characterized by X-ray diffraction, infrared spectroscopy, inductively coupled plasma and thermogravimetry techniques. Its stability was investigated in water, dilute acids, alkaline solutions, and high temperature up to 750 °C. Ion-exchange capacity and distribution coefficients (Kd) for twenty-nine radionuclides and metal ions have been determined. It was found that the TMP has high affinity for Cs+, Sr2+, UO22+, Ba2+, Pb2+, Tl+, Zn2+, Rb2+ and Zr4+ ions. The results of binary separation of metal ions showed that TMP can be potentially useful for analytical appliCations.
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synthesis characterization and analytical appliCation of a new Inorganic Cation exchanger titanium iv molybdophosphate
Talanta, 2009Co-Authors: R Yavari, S J Ahmadi, Yarong Huang, Ali Reza Khanchi, G BagheriAbstract:A novel polyoxometalate-Cation exchanger, titanium(IV) molybdophosphate (TMP) has been synthesized under varying conditions. The material was characterized by X-ray diffraction, infrared spectroscopy, inductively coupled plasma and thermogravimetry techniques. Its stability was investigated in water, dilute acids, alkaline solutions, and high temperature up to 750 degrees C. Ion-exchange capacity and distribution coefficients (K(d)) for twenty-nine radionuclides and metal ions have been determined. It was found that the TMP has high affinity for Cs(+), Sr(2+), UO(2)(2+), Ba(2+), Pb(2+), Tl(+), Zn(2+), Rb(2+) and Zr(4+) ions. The results of binary separation of metal ions showed that TMP can be potentially useful for analytical appliCations.
Mu Naushad - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of a new organic Inorganic pb2 selective composite Cation exchanger acrylonitrile stannic iv tungstate and its analytical appliCations
Chemical Engineering Journal, 2009Co-Authors: Syed Ashfaq Nabi, Mu Naushad, Rani BushraAbstract:A new polymeric–Inorganic Cation exchanger acrylonitrile stannic(IV) tungstate composite was synthesized by sol–gel technique by incorporating stannic(IV) tungstate precipitate with acrylonitrile. Composite materials formed by the combination of Inorganic ion exchangers of multivalent metal acid salts and organic polymers (acrylonitrile, cellulose acetate, polyaniline, polypyrrole, polythiophene, etc.), providing a new class of ‘organic–Inorganic’ composite exchangers with better mechanical and granulometric properties, good ion exchange capacity, higher stability, reproducibility and selectivity for heavy metals. The physico-chemical characterization was carried out by elemental analysis, TGA, SEM, XRD, FTIR and TEM studies. Ion exchange capacity, pH titrations, elution and distribution behavior were also carried out to understand the ion exchange behavior of the material. The adsorption behavior of heavy metal ions has been reported in nitric acid and two surfactants media by batch processes. The analytical appliCations of the material have been explored by achieving some analytically important binary separations from aqueous solution on its columns. The practical applicability of acrylonitrile stannic(IV) tungstate was demonstrated in the quantitative separation of Fe3+and Zn2+ contents of a commercially available pharmaceutical sample namely Fefol-Z.
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synthesis and characterization of a new Inorganic Cation exchanger zr iv tungstomolybdate analytical appliCations for metal content determination in real sample and synthetic mixture
Journal of Hazardous Materials, 2007Co-Authors: Syed Ashfaq Nabi, Mu NaushadAbstract:Abstract An amorphous sample of Inorganic Cation-exchanger Zr(IV) tungstomolybdate was prepared by mixing varying ratios of 0.1 M aqueous solution of sodium tungstate and 0.1 M aqueous solution of sodium molybdate into 0.1 M aqueous solution of zirconium oxychloride at pH 1. This Cation-exchanger was found to have a good ion-exchange capacity (2.40 mequiv. g−1 for Na+), high thermal and chemical stability. A tentative structural formula was proposed on the basis of chemical composition, FTIR and thermogravimetric analysis. Distribution coefficients (Kd) values of metal ions in various solvent systems were determined. Some important and analytically difficult quantitative binary separations viz. Ni(II)–Pb(II), Ni(II)–Zn(II), Ni(II)–Cd(II), Mg(II)–Al(III), etc. were achieved. The practical applicability of the Cation-exchanger was demonstrated in the separation of Cu(II)–Zn(II) from a synthetic mixture as well as from real samples of pharmaceutical formulation and brass alloy.
J. M. He - One of the best experts on this subject based on the ideXlab platform.
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synthesis characterization and analytical appliCation of a new Inorganic Cation exchanger titanium iv molybdophosphate
Talanta, 2009Co-Authors: R Yavari, S J Ahmadi, Yarong Huang, G Bagheri, Ali Reza Khanchi, J. M. HeAbstract:Abstract A novel polyoxometalate-Cation exchanger, titanium(IV) molybdophosphate (TMP) has been synthesized under varying conditions. The material was characterized by X-ray diffraction, infrared spectroscopy, inductively coupled plasma and thermogravimetry techniques. Its stability was investigated in water, dilute acids, alkaline solutions, and high temperature up to 750 °C. Ion-exchange capacity and distribution coefficients (Kd) for twenty-nine radionuclides and metal ions have been determined. It was found that the TMP has high affinity for Cs+, Sr2+, UO22+, Ba2+, Pb2+, Tl+, Zn2+, Rb2+ and Zr4+ ions. The results of binary separation of metal ions showed that TMP can be potentially useful for analytical appliCations.