Ion-exchange kinetics on styrene supported zirconium(IV) tungstophosphate: An organic-inorganic type cation exchanger

Abstract

<span style="font-size:14.0pt;font-family:" times="" new="" roman";color:black;mso-bidi-font-weight:="" bold"="" lang="EN-IN">Kinetics of exchange reaction of Mg²⁺, Ca²⁺, Sr²⁺, Ba²⁺, Cu²⁺, Mn²⁺, Ni²⁺ and Zn²⁺ on styrene supported zirconium (IV) tungstophosphate cation exchanger has been studied at 25, 33, 50 and 65^oC. The rate of exchange is found to be particle diffusion controlled at a metal ion <span style="font-size: 14.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:hiddenhorzocr;="" color:black;mso-bidi-font-weight:bold"="" lang="EN-IN">concentration<span style="font-size:14.0pt; font-family:" times="" new="" roman";mso-fareast-font-family:hiddenhorzocr;color:black;="" mso-bidi-font-weight:bold"="" lang="EN-IN"> <span style="font-size:14.0pt;font-family:" times="" new="" roman";color:black;="" mso-bidi-font-weight:bold"="" lang="EN-IN">0.02 M in aqueous medium. Various kinetic parameters<span style="font-size:14.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" hiddenhorzocr;color:black;mso-bidi-font-weight:bold"="" lang="EN-IN"> <span style="font-size:14.0pt;font-family:" times="" new="" roman";color:black;mso-bidi-font-weight:="" bold"="" lang="EN-IN">such as self-diffusion coefficient, <i>D</i>₀, energy of activation, <i>E</i>_ᴂand entropy of activation, Δ<i>S</i>*, have been calculated.

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