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Title: Thermodynamics and kinetics of ion exchange of a hybrid cation exchanger, zirconium diethylene triamine pentamethylene phosphonate
Authors: Patel, Parimal
Chudasama, Uma
Keywords: Ion exchange
Cation exchanger
Hybrid ion exchanger
Zirconium phosphonate
Issue Date: Oct-2010
Publisher: NISCAIR-CSIR, India
IPC CodeInt. Cl.9 B01J39/02
Abstract: A novel hybrid cation exchange material of the class of tetravalent metal acid salt, zirconium diethylene triamine pentamethylene phosphonate, has been synthesized by sol gel method. The material has been characterized by elemental analysis, FTIR, TGA and DSC studies, X-ray diffraction studies and SEM. Physico-chemical and ion exchange characteristics have also been determined. Chemical stability of the material has been assessed in various acids, bases and organic solvent media. The equilibrium exchange of Mg2+, Ca2+, Sr2+ and Ba2+ ions with the H+ ions contained in the ion exchanger has been studied at varying temperatures with constant ionic strength. On the basis of the exchange isotherms, various thermodynamic parameters such as equilibrium constant, standard Gibbs free energy, entropy and enthalpy and kinetic parameters such as self-diffusion coefficient, energy of activation and entropy of activation have been evaluated under the conditions favouring a particle diffusion-controlled mechanism.
Page(s): 1318-1324
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.49A(10) [October 2010]

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