• A study on equilibrium and kinetics of ion exchange of alkaline earth metals using an inorganic cation exchanger – zirconium titanium phosphate

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      https://www.ias.ac.in/article/fulltext/jcsc/118/02/0185-0189

    • Keywords

       

      Kinetics of ion exchange; zirconium titanium phosphate; cation exchanger; tetravalent metal acid salts; inorganic ion exchanger

    • Abstract

       

      An advanced inorganic cation exchange material of the class of tetravalent metal acid (TMA) salt, zirconium titanium phosphate (ZTP), has been synthesized by a modified sol-gel technique. ZTP has been characterized by elemental analysis (ICP-AES), thermal analysis (TGA), FTIR and X-ray diffraction studies. The Nernst-Planck equation has been used to study the forward and reverse ion exchange kinetics of Mg (II), Ca (II), Sr (II) and Ba (II) with H (I) at four different temperatures. The mechanism of exchange is particle diffusion, as confirmed by the linear τ (dimensionless time parameter) vst (time) plots. The exchange process is thus controlled by the diffusion within the exchanger particles for the systems studied herein. Further, various kinetic parameters like self-diffusion coefficient (D0), energy of activation (Ea) and entropy of activation (ΔS*) have been evaluated under conditions favouring a particle diffusion-controlled mechanism.

    • Author Affiliations

       

      Amin Jignasa1 Thakkar Rakesh1 Chudasama Uma1

      1. Applied Chemistry Department, Faculty of Technology and Engineering, MS University of Baroda, Vadodara - 390 001
    • Dates

       
  • Journal of Chemical Sciences | News

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