Synthesis, characterization and ion exchange properties of zirconium(IV) tungstoiodophosphate, a new cation exchanger

Abstract

Zirconium(IV) tungstoiodophosphate has been synthesized under a variety of conditions. The most chemically and thermally stable sample is prepared by adding a mixture of aqueous solutions of 0⋅5 mol L -1 sodium tungstate, potassium iodate and 1 mol L -1 orthophosphoric acid to aqueous solution of 0⋅1 mol L -1 zirconium(IV) oxychloride. Its ion exchange capacity for Na + and K + was found to be 2⋅20 and 2⋅35 meq g -1 dry exchanger, respectively. The material has been characterized on the basis of chemical composition, pH titration, Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis. The effect on the exchange capacity of drying the exchanger at different temperatures has been studied. The analytical importance of the material has been established by quantitative separation of Pb 2+ from other metal ions.

Synthesis and characterization of an analogue of heulandite: Sorption applications for thorium(IV), europium(III), samarium(II) and iron(III) recovery from aqueous waste

“…The effect of temperature on the removal of Th(IV), Eu(III), Sm(II), and Fe(III) in aqueous solution by synthetic analogue of heulandite was studied by varying the temperature between 303-323 K. The data presented in Fig. 9 showed that sorption of metal ion by the synthetic analogue of heulandite increased with increase in temperature, which is generally expected for the sorption/ion exchange of most metal ions from their solution [70][71][72][73][74][75][76][77][78][79]. However, the magnitude of such increase continues to decline at higher initial metal ions concentration, as temperatures are increased from 303 to 323 K. This is because with increasing temperature, the attractive forces between sorbent surface and metal ions are weakened and the sorption decreases.…”

Synthesis, characterization and proton transport properties of a mixed material—Zirconium titanium phosphate, a tetravalent bimetallic acid salt

“…compounds containing two different cations and a given anion or two different anions and a cation, are interesting since they exhibit improved properties in comparison to their single salt counterparts [32,33]. Mixed materials have been widely investigated and exhibit improved ion exchange characteristics compared to their single salt counterparts [34][35][36][37].…”

Synthesis and Characterisation of nanocomposite ion exchanger for the removal of heavy metals

“…Zirconium based ion exchangers have received attention because of their excellent ion-exchange behaviour and some important chemical applications in the field of ion exchange, ion-exchange membrane, and solid state electrochemistry [18]. Goward et al [19] have reported that polyaniline Zr(IV) tungstophosphate nanocomposite ion exchanger was used for the selective separation of Pb 2+ . The literature reveals that several three-component ion exchangers, that is, zirconium(IV)iodooxalate, zirconium(IV)phosphosilicate, zirconium (IV) phosphoborate, and zirconium(IV)tungstophosphate [20], behaviour studied for their synthesis, ionexchange behavior, and analytical applications.…”