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Citation: LIU Fu-Qiang, CHEN Jin-Long, FEI Zheng-Hao, GE Jun-Jie, LI Ai-Min, ZHANG Quan-Xing. Thermodynamics and Kinetics of the Adsorption of Amino-naphthol sulfonic acid onto a New Bi-functional Hypercrosslinked Polymeric Adsorbent[J]. Chinese Journal of Applied Chemistry, ;2003, 20(12): 1123-1128. shu

Thermodynamics and Kinetics of the Adsorption of Amino-naphthol sulfonic acid onto a New Bi-functional Hypercrosslinked Polymeric Adsorbent

1.
a State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093;
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b Department of Applied Chemistry & Environmental Engineering, Yancheng Teachers College, Yancheng

Corresponding author: LIU Fu-Qiang,
Received Date: 8 April 2003
Available Online: 4 August 2003
Fund Project: 国家自然科学基金资助项目(20274017) (20274017)江苏省自然科学基金资助项目(BK2000016) (BK2000016)江苏省教育厅指导性项目(01KJD150004) (01KJD150004)

The adsorption property of amino-naphthol-sulfonic acid(1,2,4-acid) onto the bi-functional hypercrosslinked polymeric adsorbent AL-8 based on the polystyrene resin is discussed from the thermodynamic and kinetic viewpoints. A well fitted Freundlich equation is obtained for the adsorption isotherm, indicating an endothermic and a favorable adsorption in the studied range. The capacity and affinity of the adsorption increase with temperature, integrating the phenomena of the ‘sorbent-motivated’ and the more predominant ‘solvent-motivated’ effects. The ΔH value is 28.272 kJ/mol, an indicative of a weakly chemical character and an easier desorption property. The negative value of ΔG indicates the spontaneous nature of the adsorption process, and the positive value of ΔS shows the increased randomness at the solid/solution interface during the adsorption process. Besides the intra-particle diffusion, other processes such as film diffusion also assume the control on the rate of adsorption simultaneously.
- bi-functional hypercrosslinked polymeric adsorbent,
- amino-naphthol-sulfonic acid,
- thermodynamics,
- kinetics,
- intra-particle diffusion
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