| Zeta电位法研究除草剂在土壤胶体中的吸附 |
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| 引用本文： | 杨炜春,刘维屏,胡晓捷.Zeta电位法研究除草剂在土壤胶体中的吸附[J].中国环境科学,2003,23(1):0-0. |
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| 作者姓名： | 杨炜春 刘维屏 胡晓捷 |
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| 作者单位： | 浙江大学环境科学研究所 浙江杭州310028 |
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| 基金项目： | 国家自然科学基金资助项目(39670420) |
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| 摘 要： | 应用Zeta(ζ)电位法研究比较了扑草净和扑灭通在4种土壤胶体中的吸附.结果表明,当带有正电荷的除草剂在负电荷土壤表面吸附后,土壤表面的ζ电位有所增加,甚至使ζ电位从负转变成正.通过零电荷点计算得到除草剂和土壤之间的吸附常数和Gibbs自由能,并由经典的振荡平衡法得到相近结果.
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| 关 键 词： | 扑草净 扑灭通 土壤胶体 吸附 z电位法 |
| 文章编号： | 1000-6923(2003)01-0051-04 |
| 收稿时间： | 1900-01-01; |
| 修稿时间： | 2002年4月2日 |
Study on the adsorption of herbicide in soil colloids by Zeta potential measurements |
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| YANG Wei-chun,LIU Wei-ping,HU Xiao-jie.Study on the adsorption of herbicide in soil colloids by Zeta potential measurements[J].China Environmental Science,2003,23(1):0-0. |
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| Authors: | YANG Wei-chun LIU Wei-ping HU Xiao-jie |
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| Abstract: | The adsorption of prometryne and prometon on 4 kinds of soil colloids was studied and compared using z electric potential technique. The results showed that the z electric potentials of soil surface raised somewhat as the positively charged herbicides were adsorpted on the soil surface charged negatively. The herbicides affect the z electric potential even causing its change from negative to positive. Through calculating the point of zero charge, Gibbs energies and adsorption constants between the herbicide and soil was obtained, and the results were similar to those calculated with batch oscillation equilibration technique. |
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| Keywords: | prometryne prometon soil colloid adsorption z electric potential measurement |
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