Kinetics and mechanism of the sorption of some aromatic amines onto amberlite IRA-904 anion-exchange resin
Kinetics and mechanism of the sorption of some aromatic amines onto amberlite IRA-904 anion-exchange resin
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.
anion exchange, aromatic amines, sorption, diffusion, kinetics
polyurethane foam, ligand-exchanger, sporopollenin, behavior, ion
58-63
Zaki, A. B.
d60241c5-b639-4714-ab0f-6aefe73a34cc
El-Sheikh, M. Y.
3ce29d44-2066-40b7-8927-249ed0622ae3
Evans, J.
05890433-0155-49fe-a65d-38c90ea25c69
El-Safty, S. A.
82d1f76a-0131-44a6-802e-de1bd1d2723b
1 January 2000
Zaki, A. B.
d60241c5-b639-4714-ab0f-6aefe73a34cc
El-Sheikh, M. Y.
3ce29d44-2066-40b7-8927-249ed0622ae3
Evans, J.
05890433-0155-49fe-a65d-38c90ea25c69
El-Safty, S. A.
82d1f76a-0131-44a6-802e-de1bd1d2723b
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), .
(doi:10.1006/jcis.1999.6553).
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.
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Published date: 1 January 2000
Keywords:
anion exchange, aromatic amines, sorption, diffusion, kinetics
polyurethane foam, ligand-exchanger, sporopollenin, behavior, ion
Identifiers
Local EPrints ID: 18987
URI: http://eprints.soton.ac.uk/id/eprint/18987
ISSN: 0021-9797
PURE UUID: 66a5f0de-607c-4abf-ae05-6d88b8e10ad5
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Date deposited: 18 Jan 2006
Last modified: 29 Oct 2024 02:32
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Author:
A. B. Zaki
Author:
M. Y. El-Sheikh
Author:
S. A. El-Safty
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