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Mu Naushad - One of the best experts on this subject based on the ideXlab platform.

  • ion exchange kinetic studies for cd ii co ii cu ii and pb ii metal ions over a composite Cation Exchanger
    Desalination and Water Treatment, 2015
    Co-Authors: Mu Naushad, Alok Mittal, Madhu Rathore, V Gupta
    Abstract:

    AbstractExplicit Nernst–Planck approximation is used to study the kinetics of H(I)-metal ion-exchange processes for ions having different effective diffusion coefficients, that is, for non-isotopic exchange process. Kinetic studies of four heavy metal ions (Cd2+, Co2+, Cu2+, and Pb2+) of environmental importance on the surface of acetonitrile stannic(IV) selenite composite Cation Exchanger were carried out successfully. On the basis of kinetic studies, various physical parameters, that is, fractional attainment of equilibrium U(τ), self-diffusion coefficients (Do), energy of activation (Ea), and entropy of activation (ΔS*) are estimated to evaluate the mechanism of ion exchange on the surface of composite ion-exchange material. The activation entropy and energy revealed that the greater degree and minimum energy was achieved during forward ion-exchange process. The results revealed that the kinetic studies are very important for the economic and industrial appliCations of ion-exchange materials.

  • synthesis of sodium dodecyl sulfate supported nanocomposite Cation Exchanger removal and recovery of cu2 from synthetic pharmaceutical and alloy samples
    Journal of The Iranian Chemical Society, 2015
    Co-Authors: Mu Naushad, M M Alam, Zeid A Alothman, Gaber E. Eldesoky, Md Rabiul Awual, Mahamudur Islam
    Abstract:

    A new surfactant-based nanocomposite Cation Exchanger, sodium dodecyl sulfate–Th(IV) tungstate (SDS–TT) was prepared by the sol–gel method. The SDS–TT was characterized by FTIR, XRD, TGA, SEM, EDS and TEM. The distribution studies for various metal ions on SDS–TT were performed in different acidic mediums. On the basis of distribution coefficient values, SDS–TT was found to be selective for Cu2+ metal ion. SDS–TT was successfully used for the quantitative separation of Cu2+ from the synthetic mixture, pharmaceutical formulation and brass sample. The regeneration studies were performed which showed a decrease in the recovery of Cu2+ from 88 to 70 % after seven consecutive cycles.

  • adsorption kinetics isotherms and thermodynamic studies for the adsorption of pb 2 and hg 2 metal ions from aqueous medium using ti iv iodovanadate Cation Exchanger
    Ionics, 2015
    Co-Authors: Mu Naushad, M M Alam, Md Rabiul Awual, Z A Alothman, Gaber E. Eldesoky
    Abstract:

    In the current study, Ti(IV) iodovanadate Cation Exchanger (TIV) was synthesized and applied for the removal of Pb2+ and Hg2+ metal ions from the aqueous medium. The adsorption studies were performed by the batch techniques and adsorption parameters viz. contact time, pH, initial metal ion concentration, and temperature were also investigated. The optimum adsorption of Pb2+ (95 %) and Hg2+ (65 %) were observed at pH 6. The pseudo-second order equation represented the adsorption kinetics with high correlation coefficient. Langmuir model showed the best fitting to the isotherm equilibrium data, with a maximum adsorption capacity of 18.8 mg g−1 for Pb2+ and 17.2 mg g−1 for Hg2+. Furthermore, thermodynamic factors, i.e., ΔG, ΔH, and ΔS, indicated that adsorption of Pb2+ and Hg2+ onto TIV were spontaneous, endothermic, and feasible in the temperature range of 293–323 K.

  • synthesis and characterization of a new nanocomposite Cation Exchanger polyacrylamide ce iv silicophosphate photocatalytic and antimicrobial appliCations
    Journal of Industrial and Engineering Chemistry, 2014
    Co-Authors: Deepak Pathania, Mu Naushad, Gaurav Sharma, Amit Kumar
    Abstract:

    Abstract A nanocomposite Cation Exchanger polyacrylamide Ce(IV) silicophosphate (PAM–CSP)was prepared via sol–gel method. The ion exchange capacity of nanocomposite PAM–CSP was found better (1.42 mequiv. g−1) than its inorganic counterpart Ce(IV) silicophosphate (CSP, 0.84 mequiv. g−1). The material was characterized using different techniques such as FTIR, XRD, SEM and TEM. The various physiochemical properties such as pH titration, elution concentration and elution behavior studies of PAM–CSP were studied. The pH titration studies clearly indicated the bifunctional nature of nanocomposite ion Exchanger. The effect of temperature on the ion exchange capacity of the material was also investigated. The photocatalytic activity of PAM–CSP was investigated for the degradation of methylene blue dye which revealed that 83.40% of MB was degraded in 5 h. The antimicrobial activities of PAM–CSP were also ascertained against Escherichia coli and Staphylococcus aureus.

  • evaluation of heavy metal kinetics through pyridine based th iv phosphate composite Cation Exchanger using particle diffusion controlled ion exchange phenomenon
    Journal of Industrial and Engineering Chemistry, 2014
    Co-Authors: M M Alam, Zeid A Alothman, Mu Naushad, Taieb Aouak
    Abstract:

    Abstract In this study, the ion exchange kinetics of selected heavy metals such as Cd, Cu, Pb and Zn through the pyridine based thorium(IV) phosphate composite Cation exchange material was studied. The ion exchange kinetics over this composite Cation Exchanger followed the particle diffusion controlled ion exchange phenomenon. Kinetics parameters also revealed that the mechanism of ion exchange for heavy toxic metal ion is feasible to explore the wastewater treatment.

Asif Ali Khan - One of the best experts on this subject based on the ideXlab platform.

  • synthesis and characterization of a novel hybrid nano composite Cation Exchanger poly o toluidine sn iv tungstate its analytical appliCations as ion selective electrode
    Solid State Sciences, 2013
    Co-Authors: Asif Ali Khan, Shakeeba Shaheen
    Abstract:

    Abstract A novel organic–inorganic nano composite Cation Exchanger poly- o -toluidine Sn(IV) tungstate has been synthesized by incorporation of a polymer material into inorganic precipitate. The material is a class of hybrid ion-Exchanger with good ion-exchange properties, reproducibility, stability and good selectivity for heavy metals. The physico-chemical properties of this nano composite material were characterized by using XRD, TGA, FTIR, SEM and TEM. The ion-exchange capacity, pH titrations, elution behavior and chemical stability were also carried out to study ion-exchange properties of the material. Distribution studies for various metal ions revealed that the nano composite is highly selective for Cd(II). An ion-selective membrane electrode was fabricated using this material for the determination of Cd(II) ions in solutions. The analytical utility of this electrode was established by employing it as an indicator electrode in electrometric titrations.

  • analysis of mercury ions in effluents using potentiometric sensor based on nanocomposite Cation Exchanger polyaniline zirconium titanium phosphate
    Desalination, 2011
    Co-Authors: Asif Ali Khan, Leena Paquiza
    Abstract:

    Abstract The objective of the present research was to synthesize, characterize and to investigate the efficiency of an advanced class of hybrid nano-composite Cation Exchanger for the detection of mercury(II) ion in aqueous solution. In the present study the Cation Exchanger ployaniline–zirconium titanium phosphate (PANI–ZTP) nanocomposite, was synthesized via sol–gel mixing of organic polymer polyaniline (PANI) into the matrices of the inorganic precipitate of zirconium titanium phosphate (ZTP), having extraordinary ion exchange capacity, thus used as electroactive component for the construction of an ion-selective membrane electrode. The proposed electrode shows fairly good discrimination of mercury ion over several other inorganic ions. The membrane electrode was mechanically stable, having wide dynamic range of 10 − 10  mol/m 3 to 10 − 1  mol/m 3 of Hg 2+ ions, with quick response time and could be operated for at least 4 months without any considerable divergence in the potential response characteristics. The electrode was successfully applied for direct determination of mercury ions in some real sample with satisfactory results and acts as indicator electrode in complexation titrations.

  • Preparation and characterization of electrically conducting polypyrrole Sn(IV) phosphate Cation-Exchanger and its appliCation as Mn(II) ion selective membrane electrode
    Journal of Advanced Research, 2011
    Co-Authors: Asif Ali Khan, Ummy Habiba, Leena Paquiza, Sirajuddin Ali
    Abstract:

    Polypyrrole Sn(IV) phosphate, an organic-inorganic composite Cation-Exchanger was synthesized via sol-gel mixing of an organic polymer, polypyrrole, into the matrices of the inorganic precipitate of Sn(IV) phosphate. The physico-chemical properties of the material were determined using Atomic Absorption Spectrometry (AAS), CHN elemental analysis (inductively coupled plasma mass spectrometry, ICP-MS), UV-VIS spectrophotometry, FTIR (Fourier Transform Infra-Red), SEM (Scanning Electron Microscopy), TGA-DTA (Thermogravimetric Analysis-Differential Thermal Analysis), and XRD (X-ray diffraction). Ion-exchange behavior was observed to characterize the material. On the basis of distribution studies, the material was found to be highly selective for toxic heavy metal ion Mn2+. Due to its selective nature, the material was used as an electroactive component for the construction of an ion-selective membrane electrode. The proposed electrode shows fairly good discrimination of mercury ion over several other inorganic ions. The analytical utility of this electrode was established by employing it as an indicator electrode in electrometric titrations for Mn(II) in water. ?? 2011.

  • synthesis characterization and ion exchange properties of a fibrous type polymeric inorganic composite Cation Exchanger nylon 6 6 sn iv phosphate its appliCation in making hg ii selective membrane electrode
    Electrochimica Acta, 2009
    Co-Authors: Asif Ali Khan, Tabassum Akhtar
    Abstract:

    Abstract A polymeric-inorganic composite Cation-Exchanger, i.e. Nylon-6,6 Sn(IV) phosphate was synthesized via mixing of polymer Nylon-6,6 into the matrices of inorganic precipitate of Sn(IV) phosphate to form composite Cation-Exchanger. Ion-exchange capacity (IEC), ion-exchange properties, thermal stability and distribution behavior, etc. were also carried out to understand the Cation-exchange behavior of the material. The physico-chemical properties of the material were determined using AAS, CHN elemental analysis, FTIR, TGA-DTA, XRD, and SEM studies. On the basis of distribution studies, the material was found to be highly selective for Hg(II), a highly toxic environmental pollutant. Using this electroactive composite material, a new heterogeneous precipitate based selective membrane electrode was fabricated for the determination of Hg(II) ions in solutions. The membrane electrode is mechanically stable, with a quick response time, and can be operated within a wide pH range. The selectivity coefficients for different Cations determined by mixed solution method were found to be less than unity. The electrode was also found to be satisfactory in potentiometric titrations.

  • organic inorganic composite Cation Exchanger poly o toluidine zr iv phosphate based ion selective membrane electrode for the potentiometric determination of mercury
    Analytical Sciences, 2008
    Co-Authors: Asif Ali Khan, Tabassum Akhtar
    Abstract:

    A new heterogeneous precipitate of an organic-inorganic composite Cation-Exchanger poly-o-toluidine Zr(IV) phosphate was utilized for the preparation of a Hg(II) ion-sensitive membrane electrode for the determination of Hg(II) ions in real aqueous as well as in real samples. The electrode showed good potentiometric response characteristics, and displayed a linear log[Hg 2+ ] versus EMF response over a wide concentration range of 1 ¥ 10 –1 – 1 ¥ 10 –6 M with a Nernstian slope of 30 mV per decade change in concentration with a detection limit of 1 ¥ 10 –6 . The membrane electrode showed a very fast response time of 5 s and could be operated well in the pH range 2 – 8. The selectivity coefficients were determined by the mixed-solution method, and revealed that the electrode was selective in the presence of interfering Cations; however most of these did not show significant interference in the concentration range of 1 ¥ 10 –1 – 1 ¥ 10 –4 M. The lifetime of the membrane electrode was observed to be 120 days. The analytical utility of this electrode was established by employing it as an indicator electrode in the potentiometric titrations of Hg 2+ ions from a synthetic mixture as well as drain water.

Zeid A Alothman - One of the best experts on this subject based on the ideXlab platform.

Syed Ashfaq Nabi - One of the best experts on this subject based on the ideXlab platform.

  • synthesis and characterization of a thermally stable strongly acidic cd ii ion selective composite Cation Exchanger polyaniline ce iv molybdate
    Desalination, 2010
    Co-Authors: Zafar Alam, Syed Ashfaq Nabi
    Abstract:

    Abstract A polymer supported organic–inorganic composite and strongly acidic Cation-Exchanger polyaniline Ce(IV) molybdate was chemically synthesized and demonstrated to be an excellent ion-exchange material due to its high selectivity for Cd(II), thermal stability and fast elution of an exchangeable H+ ion. The material was characterized for its ion exchange properties to study its Cation-exchange behavior. Cd(II) selectivity depends upon the distribution coefficient in several solvent systems. The selectivity of this material varied depending upon its composition and the composition of the eluting solvent. Its selectivity was examined and some important binary separations such as Cd(II)–Pb(II), Cd(II)–Hg(II), Cd(II)–Zn(II) and Cd(II)–Ni(II) were also achieved. The physico-chemical properties of the material were also studied using C, H, N elemental analysis, ICP-MS, FTIR, TGA–DTA, X-ray and SEM studies.

  • synthesis and characterization of a new organic inorganic pb2 selective composite Cation Exchanger acrylonitrile stannic iv tungstate and its analytical appliCations
    Chemical Engineering Journal, 2009
    Co-Authors: Syed Ashfaq Nabi, Mu Naushad, Rani Bushra
    Abstract:

    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.

  • EDTA-stannic(IV)iodate: preparation, characterization and its analytical appliCations for metal content determination in real and synthetic samples
    Journal of Porous Materials, 2009
    Co-Authors: Syed Ashfaq Nabi, Aabid H Shalla
    Abstract:

    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.

  • synthesis characterization and analytical appliCation of hybrid acrylamide zirconium iv arsenate a Cation Exchanger effect of dielectric constant on distribution coefficient of metal ions
    Journal of Hazardous Materials, 2009
    Co-Authors: Syed Ashfaq Nabi, Aabid H Shalla
    Abstract:

    Abstract A new hybrid inorganic–organic Cation Exchanger acrylamide zirconium (IV) arsenate has been synthesized, characterized and its analytical appliCation explored. The effect of experimental parameters such as mixing ratio of reagents, temperature, and pH on the properties of material has been studied. FTIR, TGA, X-ray, UV–vis spectrophotometry, SEM and elemental analysis were used to determine the physiochemical properties of this hybrid ion Exchanger. The material behaves as a monofunctional acid with ion-exchange capacity of 1.65 meq/g for Na + ions. The chemical stability data reveals that the Exchanger is quite stable in mineral acids, bases and fairly stable in organic solvents, while as thermal analysis shows that the material retain 84% of its ion-exchange capacity up to 600 °C. Adsorption behavior of metal ions in solvents with increasing dielectric constant has also been explored. The sorption studies reveal that the material is selective for Pb 2+ ions. The analytical utility of the material has been explored by achieving some binary separations of metal ions on its column. Pb 2+ has been selectively removed from synthetic mixtures containing Mg 2+ , Ca 2+ , Sr 2+ , Zn 2+ and Cu 2+ , Al 3+ , Ni 2+ , Fe 3+ . In order to demonstrate practical utility of the material quantitative separation of the Cu 2+ and Zn 2+ in brass sample has been achieved on its columns.

  • synthesis characterization and analytical appliCations of a new composite Cation Exchanger cellulose acetate zr iv molybdophosphate
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2008
    Co-Authors: Syed Ashfaq Nabi, Mu Naushad
    Abstract:

    Abstract A new composite Cation Exchanger cellulose acetate-Zr(IV) molybdophosphate was synthesized because composite materials formed by the combination of inorganic ion Exchangers of multivalent metal acid salts and organic polymers (cellulose acetate, polyaniline, polythiophene, polypyrrole, Nylon 6,6, etc.), providing a new class of ‘organic–inorganic’ composite ion Exchangers with better mechanical and granulometric properties, good ion exchange capacity, reproducibility, higher stability and selectivity for heavy metals. The physico-chemical properties of this material were determined using some instrumental analyses viz. FTIR, X-ray, TGA–DTA and SEM. Ion exchange capacity, pH titrations, elution and distribution behavior were also carried out to understand the ion exchange behavior of the material. Its selectivity was examined by achieving some important binary separations like Mg(II)–Ca(II), Zn(II)–Ca(III), Fe(III)–Cr(III), Zn(II)–Cr(III), Cd(II)–Hg(II), Cd(II)–Cr(III) on its column. This new Exchanger was offered a variety of technological opportunity for quantitative determination and separation of Cr 3+ from a synthetic mixture of metal ions and Ca 2+ from commercially available vitamin and minerals formulation namely Recovit.

Tabassum Akhtar - One of the best experts on this subject based on the ideXlab platform.

  • synthesis characterization and ion exchange properties of a fibrous type polymeric inorganic composite Cation Exchanger nylon 6 6 sn iv phosphate its appliCation in making hg ii selective membrane electrode
    Electrochimica Acta, 2009
    Co-Authors: Asif Ali Khan, Tabassum Akhtar
    Abstract:

    Abstract A polymeric-inorganic composite Cation-Exchanger, i.e. Nylon-6,6 Sn(IV) phosphate was synthesized via mixing of polymer Nylon-6,6 into the matrices of inorganic precipitate of Sn(IV) phosphate to form composite Cation-Exchanger. Ion-exchange capacity (IEC), ion-exchange properties, thermal stability and distribution behavior, etc. were also carried out to understand the Cation-exchange behavior of the material. The physico-chemical properties of the material were determined using AAS, CHN elemental analysis, FTIR, TGA-DTA, XRD, and SEM studies. On the basis of distribution studies, the material was found to be highly selective for Hg(II), a highly toxic environmental pollutant. Using this electroactive composite material, a new heterogeneous precipitate based selective membrane electrode was fabricated for the determination of Hg(II) ions in solutions. The membrane electrode is mechanically stable, with a quick response time, and can be operated within a wide pH range. The selectivity coefficients for different Cations determined by mixed solution method were found to be less than unity. The electrode was also found to be satisfactory in potentiometric titrations.

  • organic inorganic composite Cation Exchanger poly o toluidine zr iv phosphate based ion selective membrane electrode for the potentiometric determination of mercury
    Analytical Sciences, 2008
    Co-Authors: Asif Ali Khan, Tabassum Akhtar
    Abstract:

    A new heterogeneous precipitate of an organic-inorganic composite Cation-Exchanger poly-o-toluidine Zr(IV) phosphate was utilized for the preparation of a Hg(II) ion-sensitive membrane electrode for the determination of Hg(II) ions in real aqueous as well as in real samples. The electrode showed good potentiometric response characteristics, and displayed a linear log[Hg 2+ ] versus EMF response over a wide concentration range of 1 ¥ 10 –1 – 1 ¥ 10 –6 M with a Nernstian slope of 30 mV per decade change in concentration with a detection limit of 1 ¥ 10 –6 . The membrane electrode showed a very fast response time of 5 s and could be operated well in the pH range 2 – 8. The selectivity coefficients were determined by the mixed-solution method, and revealed that the electrode was selective in the presence of interfering Cations; however most of these did not show significant interference in the concentration range of 1 ¥ 10 –1 – 1 ¥ 10 –4 M. The lifetime of the membrane electrode was observed to be 120 days. The analytical utility of this electrode was established by employing it as an indicator electrode in the potentiometric titrations of Hg 2+ ions from a synthetic mixture as well as drain water.

  • preparation physico chemical characterization and electrical conductivity measurement studies of an organic inorganic nanocomposite Cation Exchanger poly o toluidine zr iv phosphate
    Electrochimica Acta, 2008
    Co-Authors: Asif Ali Khan, Tabassum Akhtar
    Abstract:

    Abstract An organic–inorganic nanocomposite Cation-Exchanger, i.e. poly- o -toluidine Zr(IV) phosphate was synthesized via sol–gel mixing of an electrical conducting polymer poly- o -toluidine into the matrices of inorganic precipitate of Zr(IV) phosphate. The ion-exchange capacity, chemical stability, effect of eluant concentration, elution behavior, pH titration and thermal studies were also carried out to understand the ion-exchange capabilities. The physico-chemical properties of the material were determined using AAS, CHN elemental analysis, FTIR, TGA–DTA, XRD, TEM and SEM studies. On the basis of distribution studies, the material was found to be highly selective for Hg(II). Its selectivity was examined by achieving some important binary separations like Hg(II)–Pb(II), Hg(II)–Cu(II), Hg(II)–Co(II), Hg(II)–Fe(III), Hg(II)–Sr(II), etc. on its column. This material possessed d.c. electrical conductivity in the semi-conducting range, i.e. 10 −3 to 10 −2  S cm −1 ; measured by four-in-line probe d.c. electrical conductivity-measuring technique. The d.c. electrical conductivity of the composite material was found stable upto 110 °C for the composites under ambient conditions.