THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS

Chao  Long; Quan-xing  Zhang; Ai-min  Li; Jin-long  Chen

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THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS

Papers | Updated：2021-06-21

- THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS
- Vol. 22, Issue 6, Pages: 535-542(2004)
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- Published：20 December 2004
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Chao Long, Quan-xing Zhang, Ai-min Li, et al. THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS[J]. 2004, 22(6): 535-542.
DOI：

Chao Long, Quan-xing Zhang, Ai-min Li, et al. THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS[J]. 2004, 22(6): 535-542. DOI：

摘要

The adsorption equilibrium isotherms of three aromatic sulfonic acid compounds

2-naphthalenesulfonic acid

p-toluenesulfonic acid and p-chlorobenzenesulfonic acid

from aqueous solutions by macroporous weak base anion exchanger within the temperature range of 293 K?313 K were obtained. Several isotherm equations were correlated with the equilibrium data

and the experimental data was found to fit the three-parameter Redlich-Peterson equation best within the entire range of concentrations. The study showed that the hydrophobicity of solute has distinct influence on adsorption capacity of the anion exchanger for the aromatic sulfonic acid. Moreover

estimations of the isosteric enthalpy

free energy

and entropy change of adsorption were also reported. The positive isosteric enthalpy and entropy change for adsorption indicate an endothermic and entropy driven process in the present study.

Abstract

The adsorption equilibrium isotherms of three aromatic sulfonic acid compounds

2-naphthalenesulfonic acid

p-toluenesulfonic acid and p-chlorobenzenesulfonic acid

from aqueous solutions by macroporous weak base anion exchanger within the temperature range of 293 K?313 K were obtained. Several isotherm equations were correlated with the equilibrium data

estimations of the isosteric enthalpy

free energy

and entropy change of adsorption were also reported. The positive isosteric enthalpy and entropy change for adsorption indicate an endothermic and entropy driven process in the present study.

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