Polyacrylamide thorium (IV) phosphate as an important lead selective fibrous ion exchanger: Synthesis, characterization and removal study

Islam, Mahamudur; Patel, Raj Kishore

doi:10.1016/j.jhazmat.2007.12.046

Cited by 58 publications

(38 citation statements)

References 38 publications

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“…The composite ion exchangers have been used in environmental remediation because of their selectivity, specificity and wide range of applicability (Khan and Khan 2010;Vatutsina et al 2007). The attempt has been made by various researches to improve the chemical, mechanical, thermal properties and selectivity of composite ion exchangers for certain heavy metal ions (Islam and Patel 2008;Nabi and Naushad 2008;Bushra et al 2012;Nabi et al 2011;Khan and Paquiza 2011). The composite ion exchangers have been used effectively in different fields such as ion selective electrodes, catalysis, hydrometallurgy, bimolecular separations, chromatography and environmental science engineering (Hassan et al 2001;Nabi et al 2010;Arrad and Sasson 1989).…”

Section: Introductionmentioning

confidence: 99%

Pectin–cerium (IV) tungstate nanocomposite and its adsorptional activity for removal of methylene blue dye

Gupta

Pathania

Singh

2013

Int. J. Environ. Sci. Technol.

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Pectin-cerium (IV) tungstate composite (Pc/ CT) has been prepared by sol gel method at room temperature. The composite ion exchanger has been characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and Fourier infrared spectroscopy. The ion exchange capacity, pH titrations, thermal stability and distribution coefficient of composite ion exchanger were investigated. The Na ? ions exchange capacity of the Pc/CT has been observed higher (1.4 meq g -1 ) as compared to its inorganic counterpart (0.8 meq g -1 ). Pc/CT composite ion exchanger was thermally stable and retained about 60 % of its ion exchange capacity up to 400°C. The distribution study has inferred more selective the Pc/CT for Zn 2? as compared to other metal ions. The adsorption efficiency of Pc/CT was tested for methylene blue removal dye from aqueous phase. The removal of dye followed pseudo-second-order kinetics.

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Section: Introductionmentioning

confidence: 99%

Pectin–cerium (IV) tungstate nanocomposite and its adsorptional activity for removal of methylene blue dye

Gupta

Pathania

Singh

2013

Int. J. Environ. Sci. Technol.

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“…Studies in the field of composite ion exchange materials comprised of inorganic ion exchangers and polymeric matrixes are increasing due to the material's high M. Talha mechanical, thermal and radiative stabilities, selectivity for heavy toxic metal ions and high ion exchange capacity as compared to parent counterparts under certain conditions [1][2][3][4][5][6][7]. Due to improved performance, composite ion exchange materials have been extensively used in environmental remediation, analytical and electroanalytical processes such as waste water treatment, separation of metal ions, catalysis, polymer electrolyte membrane fuel cells and gas perm-selectivity [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Ion Exchange Kinetics of Heavy Metal Ions on Organic–Inorganic Composite Cation Exchanger Poly-o-toluidine Zr(IV) Tungstate

Talha

Naushad

2012

J Inorg Organomet Polym

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To study the ion exchange kinetics of heavy metal ions on the organic-inorganic composite cation exchanger poly-o-toluidine Zr(IV) tungstate, NernstPlanck was computer simulated. Simulated numerical results for counter ions (Cu, Zn, Cd and Pb) of equal valence and four different ionic mobilities are presented to understand the ionic diffusion process. These results are based on the fractional attainment of equilibrium U(s), of the counter ions under study. The forward (M 2? -H ? ) and reverse (H ? -M 2? ) ion exchange processes are justified as the particle diffusion phenomenon. The self-diffusion coefficient (D o ), energy of activation (E a ), and entropy of activation (DS*) have also been estimated to understand the ion exchange process occurring over the surface of this cation exchanger and indicated that the ion exchange process is feasible and spontaneous. It is concluded that the difference in activation energies and entropy of activation may facilitate the separation of metal ions. The regeneration capability of this cation exchanger was also explained.

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“…It may be due to the overlapping of active sites at higher dosage. So, there was not any increase in the effective surface area resulting in the conglomeration of exchanger particles (Islam and Patel 2008). The adsorption of Cd 2? onto polyaniline Sn(IV) silicate exchanger was studied by varying initial cadmium concentration (200-1,000 mg L -1 ).…”

Section: Resultsmentioning

confidence: 92%

“…This is due to high H ? ion concentration, which reversed the process of adsorption and the process of regeneration predominated over the process of removal (Islam and Patel 2008). At higher pH (i.e.…”

Section: Resultsmentioning

confidence: 99%

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Adsorption of cadmium ion using a new composite cation-exchanger polyaniline Sn(IV) silicate: kinetics, thermodynamic and isotherm studies

Naushad

ALOthman

Islam³

2013

Int. J. Environ. Sci. Technol.

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A new organic-inorganic composite cation exchanger polyaniline Sn(IV) silicate has been synthesized. The physicochemical properties of this ion exchanger were determined using different analytical techniques including fourier transform infrared spectroscopy, simultaneous thermogravimetry-differential thermogravimetry analyses, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy and elemental analysis studies. Ion exchange capacity and effect of heating temperature on ion exchange capacity were also carried out on this ion exchange material. Adsorption properties for different metal ions have been investigated and the results revealed that polyaniline Sn(IV) silicate had the highest adsorption capacity for Cd 2? ion. It's selectivity was tested by achieving some important binary separations. Dependence of adsorption on contact time, temperature, pH of the solution and exchanger dose had been studied to achieve the optimum conditions. Adsorption kinetic study showed that the adsorption process followed the first order kinetics. Adsorption data were fitted to linearly transformed Langmuir isotherm with R 2 (correlation coefficient) [0.99. The maximum removal of Cd 2? was found at pH 9. The adsorption was fast and the equilibrium established within 40 min. Thermodynamic parameters viz-entropy change, enthalpy change and Gibb's free energy change were also calculated.

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Polyacrylamide thorium (IV) phosphate as an important lead selective fibrous ion exchanger: Synthesis, characterization and removal study

Cited by 58 publications

References 38 publications

Pectin–cerium (IV) tungstate nanocomposite and its adsorptional activity for removal of methylene blue dye

Pectin–cerium (IV) tungstate nanocomposite and its adsorptional activity for removal of methylene blue dye

Ion Exchange Kinetics of Heavy Metal Ions on Organic–Inorganic Composite Cation Exchanger Poly-o-toluidine Zr(IV) Tungstate

Adsorption of cadmium ion using a new composite cation-exchanger polyaniline Sn(IV) silicate: kinetics, thermodynamic and isotherm studies

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