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| Adsorption thermodynamics and kinetic investigation of aromatic amphoteric compounds onto different polymeric adsorbents | |
| 作者姓名： | WANG Hai-ling FEI Zheng-hao CHEN Jin-long ZHANG Quan-xing XU Yan-hua |
| 作者单位： | WANG Hai-ling FEI Zheng-hao CHEN Jin-long ZHANG Quan-xing XU Yan-hua 1.College of Environment，Nanjing University of Technology，Nanjing 210009，China. 2.Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection，Yancheng 224002，China 3.State Key Laboratory of Pollution Control and Resources Reuse，School of Environment，Nanjing University，Nanjing 210093，China |
| 摘 要： | The adsorption behavior of p-aminobenzoic acid and o-aminobenzoic acid onto the different polymeric adsorbents was systematically investigated as a function of the solution concentration and temperature.Experimental results indicated that the equilibrium adsorption data of the four polymeric adsorbents fitted well in the Freundlich isotherm.The adsorption capacity of multi-functional polymeric adsorbent NJ-99 was the highest,which might be attributed to the strong hydrogen-bonding interaction between the amino groups on the resin and the carboxyl group of aminobenzoic acid.The adsorption capacity of o-aminobenzoic acid onto any adsorbent was higher than p-aminobenzoic acid.Thermodynamic studies suggested the exothermic,spontaneous physical adsorption process.Adsorption kinetics results showed that the adsorption followed the pseudo-second-order kinetics model and the intraparticle mass transfer process was the rate-controlling step. |
| 关 键 词： | 芬芳化合物 聚合吸附剂 吸附作用 热力学 动力学 |
| 收稿时间： | 29 January 2007 |
| 修稿时间： | 2007-01-29 |
Adsorption thermodynamics and kinetic investigation of aromatic amphoteric compounds onto different polymeric adsorbents |
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| WANG Hai-ling,FEI Zheng-hao,CHEN Jin-long,ZHANG Quan-xing,XU Yan-hua.Adsorption thermodynamics and kinetic investigation of aromatic amphoteric compounds onto different polymeric adsorbents[J].Journal of Environmental Sciences,2007,19(11):1298-1304. | |
| Authors: | WANG Hai-ling FEI Zheng-hao CHEN Jin-long ZHANG Quan-xing and XU Yan-hua |
| Institution: | 1. College of Urban Construction and Safety and Environmental Engineering, Nanjing University of Technology, Nanjing 210009, China;Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng 224002, China 2. Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng 224002, China 3. State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, China 4. College of Urban Construction and Safety and Environmental Engineering, Nanjing University of Technology, Nanjing 210009, China |
| Abstract: | The adsorption behavior of p-aminobenzoic acid and o-aminobenzoic acid onto the different polymeric adsorbents was systematically investigated as a function of the solution concentration and temperature. Experimental results indicated that the equilibrium adsorption data of the four polymeric adsorbents fitted well in the Freundlich isotherm. The adsorption capacity of multi-functional polymeric adsorbent NJ-99 was the largest, which might be attributed to the strong hydrogen-bonding interaction between the amino groups on the resin and the carboxyl group of aminobenzoic acid. The adsorption capacity of o-aminobenzoic acid onto any adsorbent was larger than p-aminobenzoic acid. Thermodynamic studies suggested the exothermic, spontaneous physical adsorption process. Adsorption kinetics results showed that the adsorption conforms to the pseudo-second-order kinetics model and the intraparticle mass transfer process was the rate-controlling step. |
| Keywords: | aromatic amphoteric compound aminobenzoic acid polymeric adsorbents adsorption thermodynamics kinetics adsorbents polymeric adsorbent different compounds amphoteric aromatic investigation kinetics model thermodynamics mass transfer process step physical adsorption Thermodynamic studies strong interaction aminobenzoic acid groups resin carboxyl group |
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