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Title: Solid phase electrokinetics of lndion-225 cation exchange resin
Authors: Prasad, Mahendra
Singh, Kaman
Mishra, H S
Issue Date: Mar-1999
Publisher: NISCAIR-CSIR, India
Abstract: Solid phase electrokinetics of Indion-225 cation exchange resin regenerated in H+ form was studied employing different cell configurations. At 25°C, the rate was 0.88 cm-3 min-1 whereas at 90°C, the observed rate was 0.58 cm-3 min-1 for the cell Pt/R-H/Pt. However, the observed rate was 0.49 and 0.55 cm-3 min-1 at 25 and 80°C respectively employing the cell Cu/resin/Cu. Polarisation kinetics of the resin is governed by hopping of the protons from one site to another discharge of electrodes giving typical ionic behaviour of current polarisation. Hence, any decrease in proton concentration and nonavailability of discharging sites on the surface of the resin are rate determining factors and consequently the order of the reaction was found to be two with activation energies of 0.42 and 0.20 eV in case of Pt and Cu electrodes respectively. Electronic and ionic regions have been observed as suggested by Rosenbergs in case of proteins. The activation energy seemed to be strongly influenced by electrode materials.
Page(s): 63-70
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.06(2) [March 1999]

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