| Removal of Pb^2＋ and Cd^2＋ by adsorption on clay-solidified grouting curtain for waste landfills |
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| 引用本文： | 陈永贵,张可能,邹银生,邓飞跃.Removal of Pb^2＋ and Cd^2＋ by adsorption on clay-solidified grouting curtain for waste landfills[J].中南工业大学学报(英文版),2006,13(2):166-170. |
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| 作者姓名： | 陈永贵 张可能 邹银生 邓飞跃 |
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| 作者单位： | [1]School of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha 410076, China [2]School of Geoscience and Environmental Engineering, Central South University, Changsha 410083, China [3]School of Civil Engineering, Hunan University, Changsha 410082, China [4]School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | Project （200065） supported by University Key Teacher Foundation of the Ministry of Education of China |
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| 摘 要： | Pb^2＋ and Cd^2＋ in leachate were adsorbed on clay-solidified grouting curtain for waste landfills with equilibrium experiment. The cation exchange capacity was determined with ammonium acetate. And the concentration of heavy metal cations in leachate was determined with atomic absorption spectrophotometer. Their equilibrium isotherms were measured, and the experimental isotherm data were analyzed by using Freundlich and Langmuir models. The results show that the adsorption capacities of the heavy metal cations are closely related to the compositions of clay-solidified grouting curtain, and the maximum adsorption appears at the ratio of cement to clay of 2 ： 4 in the experimental conditions. At their maximum adsorption and pH 5.0, the adsorption capacities of Pb^2＋ and Cd^2＋ are 16.19 mg/g and 1.21 mg/g. The competitive adsorption coefficients indicate that the adsorption of clay-solidified grouting curtain for Pb^2＋ is stronger than that for Cd^2＋. The adsorption process conforms to Freundlich＇s model with related coefficient higher than 0. 996.
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| 关 键 词： | 吸附 重金属 土壤污染 浸出液 污染治理 |
| 文章编号： | 1005-9784（2006）02-0166-05 |
| 收稿时间： | 2005-05-28 |
| 修稿时间： | 2005-08-13 |
Removal of Pb2+ and Cd2+ by adsorption on clay-solidified grouting curtain for waste landfills |
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| Chen Yong-gui , Zhang Ke-neng , Zou Yin-sheng and Deng Fei-yue.Removal of Pb2+ and Cd2+ by adsorption on clay-solidified grouting curtain for waste landfills[J].Journal of Central South University of Technology,2006,13(2):166-170. |
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| Authors: | Chen Yong-gui Zhang Ke-neng Zou Yin-sheng and Deng Fei-yue |
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| Affiliation: | (1) School of Bridge and Structural Engineering, Changsha University of Science and Technology, 410076 Changsha, China;(2) School of Geoscience and Environmental Engineering, Central South University, 410083 Changsha, China;(3) School of Civil Engineering, Hunan University, 410082 Changsha, China;(4) School of Chemistry and Chemical Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | Pb2+ and Cd2+ in leachate were adsorbed on clay-solidified grouting curtain for waste landfills with equilibrium experiment. The cation
exchange capacity was determined with ammonium acetate. And the concentration of heavy metal cations in leachate was determined
with atomic absorption spectrophotometer. Their equilibrium isotherms were measured, and the experimental isotherm data were
analyzed by using Freundlich and Langmuir models. The results show that the adsorption capacities of the heavy metal cations
are closely related to the compositions of clay-solidified grouting curtain, and the maximum adsorption appears at the ratio
of cement to clay of 2:4 in the experimental conditions. At their maximum adsorption and pH 5.0, the adsorption capacities
of Pb2+ and Cd2+ are 16.19 mg/g and 1.21 mg/g. The competitive adsorption coefficients indicate that the adsorption of clay-solidified grouting
curtain for Pb2+ is stronger than that for Cd2+. The adsorption process conforms to Freundlich’s model with related coefficient higher than 0.996.
Foundation item: Project (200065) supported by University Key Teacher Foundation of the Ministry of Education of China |
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| Keywords: | adsorption clay-solidified grouting curtain Pb2 Cd2 Freundlich model leachate treatment |
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