| 土壤磷酸盐的吸收对Cu2+二次吸附动力学的影响 |
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| 引用本文： | ZHOU Dai-Hu,DONG Yuan-Yan,LI Xue-Yuan,XU Feng-Lin. 土壤磷酸盐的吸收对Cu2+二次吸附动力学的影响[J]. 土壤圈, 1995, 5(2): 143-149 |
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| 作者姓名： | ZHOU Dai-Hu DONG Yuan-Yan LI Xue-Yuan XU Feng-Lin |
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| 作者单位： | [1]DepartmentofSoilScience,HuazhongAgriculturalUniversity,Wuhan430070,China [2]DepartmentofSoilScience,Huaz |
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| 基金项目： | *1Project supported by the Laboratory of Material Cycling in Pedosphere, Academia Sinica, and the National Natural Science Foundation of China. |
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| 摘 要： | The effects of sorbed phosphate on the kinetics of Cu^2 secondary adsorption on three major types of soils in southern and Central China were studied using the batch method and flow (or miscible displacement) techniques.Both of the methods showed that diffusions were the ratedetermining steps in the Cu^2 adsorption by the soils.By the flow method,the course of Cu^2 adsorption kinetics consisted of two steps-sn initial rapid process and a later slow process of Cu^2 adsorption;while by the batch method,the 90% of Cu^2 adsorption reaction was found to finish within first 1 minute.The results obtained using the flow method also indicated that for red soil and yellow-brown soil ,Cu^2 adsorptions during the initial reaction periods were restrained when the soils sorbed phosphate,whereas the adsorption reactions were stimulated at the final time,For grey Chao soil,sorbed phosphate retarded the Cu^2 adsorption in the whole reaction period.The results obtained using the batch method and low techniques all implied that the different effects of sorbed phosphate would be attributed to its effects on Cu^2 ion diffusion in soil solution.
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| 关 键 词： | 吸附态磷酸盐 铜离子二次吸附 土壤吸附 动力学 相互作用 磷 铜 |
Effects of sorbed phosphate on kinetics of Cn2+ secondary adsorption of soils |
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| ZHOU Dai-Hu,DONG Yuan-Yan,LI Xue-Yuan and XU Feng-Lin. Effects of sorbed phosphate on kinetics of Cn2+ secondary adsorption of soils[J]. Pedosphere, 1995, 5(2): 143-149 |
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| Authors: | ZHOU Dai-Hu DONG Yuan-Yan LI Xue-Yuan XU Feng-Lin |
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| Affiliation: | [1]DepartmentofSoilScience,HuazhongAgriculturalUniversity,Wuhan430070,China [2]DepartmentofSoilScience,Huaz |
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| Abstract: | The effects of sorbed phosphate on the kinetics of Cu^2 secondary adsorption on three major types of soils in southern and Central China were studied using the batch method and flow (or miscible displacement) techniques.Both of the methods showed that diffusions were the ratedetermining steps in the Cu^2 adsorption by the soils.By the flow method,the course of Cu^2 adsorption kinetics consisted of two steps-sn initial rapid process and a later slow process of Cu^2 adsorption;while by the batch method,the 90% of Cu^2 adsorption reaction was found to finish within first 1 minute.The results obtained using the flow method also indicated that for red soil and yellow-brown soil ,Cu^2 adsorptions during the initial reaction periods were restrained when the soils sorbed phosphate,whereas the adsorption reactions were stimulated at the final time,For grey Chao soil,sorbed phosphate retarded the Cu^2 adsorption in the whole reaction period.The results obtained using the batch method and low techniques all implied that the different effects of sorbed phosphate would be attributed to its effects on Cu^2 ion diffusion in soil solution. |
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| Keywords: | Cu2+ secondary adsorption kinetics soils sorbed phosphate |
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