| 黄棕壤和红壤吸附磷酸根后对Zn^2＋和Cd^2＋次级吸附的动力学 |
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| 引用本文： | 董元彦,罗厚庭.黄棕壤和红壤吸附磷酸根后对Zn^2＋和Cd^2＋次级吸附的动力学[J].环境化学,1995,14(4):300-305. |
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| 作者姓名： | 董元彦 罗厚庭 |
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| 作者单位： | 华中农业大学!武汉430070 |
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| 基金项目： | 中国科学院土壤圈物质循环开放实验室资助. |
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| 摘 要： | 本文用流动法考察湖北省黄棕壤和湖南省红壤吸附磷酸根后，对Ｚｎ＾２＋和Ｃｄ＾２＋次级吸附的动力学。结果表明，Ｚｎ＾２＋和Ｃｄ＾２＋的次级吸附动力学可用一级议程拟合。初级吸附的磷酸根可造成黄棕壤对Ｚｎ＾２＋和Ｃｄ＾２＋次级吸附的速率下降；而红壤对Ｚｎ＾２＋和Ｃｄ＾２＋次级吸附的快反应速率下降，慢反应速率加大。Ｚｎ＾２＋和Ｃｄ＾２＋浓度增高可加快次级吸附反应速率；升高温度也可增快次级吸附速率。扩散作用对
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| 关 键 词： | 动力学 吸附 黄棕壤 红壤 铜离子 镉离子 |
KINETICS OF Zn~(2+) AND Cd~(2+) SECONDARY ADSORPTION ON YELLOW BROWN SOIL AND RED SOIL PRETREATED WITH PHOSPHATE |
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| Dong Yuanyan Luo Houting Li Xueyuan.KINETICS OF Zn~(2+) AND Cd~(2+) SECONDARY ADSORPTION ON YELLOW BROWN SOIL AND RED SOIL PRETREATED WITH PHOSPHATE[J].Environmental Chemistry,1995,14(4):300-305. |
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| Authors: | Dong Yuanyan Luo Houting Li Xueyuan |
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| Abstract: | A flow method was used to study the kinetics of Zn2+and Cd2+ secondary adsorption on yellow brown soil and red soil , which were pretreated with phosphate. The results showed that the kinetics of Zn2+ and Cd2+ secondary adsorption could be described well with the first-order equation. The rate of Zn2+ and Cd2+ secondary adsorption on yellow brown soil was decreased because of phosphate elementary adsorption. For red soil the rate of fast reaction of Zn2+ and Cd2+ secondary adsorption was also decreased , but the rate of slow reaction was increased. The rate of secondary adsorption was increased with raising Zn2+ and Cd2+ concentration and temperature. The effect of diffusion on secondary adsorption of Zn2+ was greater than on that of and Cd2+. |
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| Keywords: | kinetics secondary adsorption Zn2+ Cd2+ |
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