| Adsorption Kinetics of Pb2+ and Cu2+ on Variable Charge Soils and Minerals: Ⅲ. Adsorption Kinetics of Pb2+ Within 30 Minutes |
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| 作者姓名： | HU GUO-SONG YU MING-FENG |
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| 作者单位： | Institute of Soil Science. Academia Sinica, P. O. Box 821, Nanjng 210008;Institute of Soil Science. Academia Sinica, P. O. Box 821, Nanjng 210008 |
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| 基金项目： | Project supported by the National Natural Science Foundation of China. |
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| 摘 要： | The adsorption kinetics of Pb2+ on different soils and minerals with variable charges was studied by the two ion-selective electrode technique at different pH and concentrations. The results showed that more than 95% of adsorption on all the samples occurred during the first 5 minutes. All adsorption time-dependent data could fit the surface second-order equation very well. The values of Xm were goethite > kaolinite, and latosol > red soil at the same initial reaction concentration. The values of k were kaolinite > > goethite, and latosol > red soil at the same reaction pH and initial concentration.
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| 关 键 词： | 土壤 表面电荷 离子吸附 吸附动力学 铅离子 铜离子 双向离子选择电极法 |
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