Kinetics and mechanism of the sorption of some aromatic amines onto amberlite IRA-904 anion-exchange resin


Zaki, A. B., El-Sheikh, M. Y., Evans, J. and El-Safty, S. A. (2000) Kinetics and mechanism of the sorption of some aromatic amines onto amberlite IRA-904 anion-exchange resin. Journal of Colloid and Interface Science, 221, (1), 58-63. (doi:10.1006/jcis.1999.6553).

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Original Publication URL: http://dx.doi.org/10.1006/jcis.1999.6553

Description/Abstract

The kinetics of the sorption of aromatic amines such as o-aminophenol (o-AP), o-phenylenediamine (o-PDA), and phenylenediamine (p-PDA) onto Amberlite anion-exchange resin in chloride form was investigated in batch experiments spectrophotometrically at different temperatures. The sorption rate is zero order in all amines sorbed, increasing directly in the order: p-PDA < o-PDA < o-AP, which corresponds to the sequence of the electrostatic contributions to the sorption interactions. The attainment of sorption equilibrium of aromatic amines is seen to be similar. The diffusion coefficients (D) have been calculated by using Fick's equation from the second portions of the sorption/desorption curves; D values ranged from 0.7 to 2.8 x 10(-9) cm(2)/s. These results, reflecting the diffusion mechanism, were ascribed to intraparticle diffusion. Arrhenius parameters for the diffusion process and the thermodynamic quantities for the process of equilibrium sorption have been estimated. The effect of a chemical oxidation reaction on intraparticle diffusion was investigated by measuring the intraparticle diffusion of amines during the redox reaction.

Item Type: Article
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Keywords: anion exchange, aromatic amines, sorption, diffusion, kinetics polyurethane foam, ligand-exchanger, sporopollenin, behavior, ion
Subjects: Q Science
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Chemistry
ePrint ID: 18987
Date Deposited: 18 Jan 2006
Last Modified: 27 Mar 2014 18:08
Contact Email Address: je@soton.ac.uk
URI: http://eprints.soton.ac.uk/id/eprint/18987

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