| THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS |
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| 作者姓名： | 龙超 |
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| 作者单位： | State Key |
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| 摘 要： | INTRODUCTIONAromatic sulfonic acids are important intermediates in the production of a variety of synthetic dyes, opticalbrighteners, fluorescent whitening agents and pharmaceuticals. A variety of substituted benzene and naphthalenesulfonates are thus produced on a large scale in the chemical industry. Generally, aromatic sulfonic acids areprepared by sulphonation of simple aromatic hydrocarbons or their derivatives. Due to the good solubility andstrong hydrophilicity of aromatic sulfonic…
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| 收稿时间： | 2003-07-29 |
| 修稿时间： | 2003-11-20 |
THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS |
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| Chao Long,Quan-xing Zhang,Ai-min Li,Jin-long Chen.THERMODYNAMIC STUDY ON ADSORPTION OF AROMATIC SULFONIC ACIDS ONTO MACROPOROUS WEAK BASE ANION EXCHANGER FROM AQUEOUS SOLUTIONS[J].Chinese Journal of Polymer Science,2004,0(6):535-542. |
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| Authors: | Chao Long Quan-xing Zhang Ai-min Li Jin-long Chen |
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| Institution: | State Key Laboratory of Pollution Control and Resources Reuse,Department of Environmental Engineering, Nanjing University, Nanjing 210093, China State Key Laboratory of Pollution Control and Resources Reuse,Department of Environmental Engineering, Nanjing University, Nanjing 210093, China State Key Laboratory of Pollution Control and Resources Reuse,Department of Environmental Engineering, Nanjing University, Nanjing 210093, China State Key Laboratory of Pollution Control and Resources Reuse,Department of Environmental Engineering, Nanjing University, Nanjing 210093, China |
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| Abstract: | The adsorption equilibrium isotherms of three aromatic sulfonic acid compounds, 2-naphthalenesulfonic acid, ptoluenesulfonic 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. |
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| Keywords: | Aromatic sulfonic acids Macroporous weak base anion exchanger Adsorption thermodynamics |
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