Thermodynamics and kinetics of ion exchange using titanium diethylene triamine pentamethylene phosphonate - a hybrid cation exchanger

Abstract

A novel hybrid cation exchange material [titanium diethylene triamine pentamethylene phosphonate (TiDETPMP)] of the

class of tetravalent metal acid (TMA) salt has been synthesized by sol gel method. Material has been analyzed by spectroscopy and

thermal methods. A study on equilibrium exchange of Mg²⁺, Ca²⁺, Sr²⁺ and Ba²⁺ ions with H⁺ ions contained in TiDETPMP, revealed

mechanism to be ion exchange. Thermodynamic and kinetic parameters have also been evaluated under conditions favouring a

particle diffusion-controlled mechanism.