中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (01): 112-116.

• 研究论文 • 上一篇    下一篇

甲基对硫磷和西维因在粘土矿物表面的吸附解吸特性

赵瑾瑾1,贺小敏1,冯伟亮1,陈瑞文1,李胜清1,陈浩1*,黄巧云2   

  1. (华中农业大学1.理学院；2.农业部亚热带农业资源与环境重点开放实验室 武汉 430070)
  • 收稿日期:2009-01-20 修回日期:2009-04-17 出版日期:2010-01-10 发布日期:2010-01-10
  • 通讯作者: 陈浩, 男, 教授，博士生导师; E-mail:hchenhao@mail.hzau.edu.cn; 研究方向：环境分析
  • 作者简介:通讯联系人：陈浩，男，教授，博士生导师；Email：hchenhao@mail.hzau.edu.cn；研究方向：环境分析
  • 基金资助:
    国家高技术研究发展计划（“八六三”计划2006AA10Z335）资助项目

Adsorption/Desorption Characteristics of Methyl Parathion and Carbaryl on Clay Minerals

ZHAO Jin-Jin1, HE Xiao-Min1, FENG Wei-Liang1, CHEN Rui-Wen1, LI Sheng-Qing1, CHEN Hao1*, HUANG Qiao-Yun2   

  1. (1.College of Sciences;bKey Laboratory of Subtropical Agricultural Resources and Environment,
    2.Ministry of Agriculture,Huazhong Agriculture University,Wuhan 430070)
  • Received:2009-01-20 Revised:2009-04-17 Published:2010-01-10 Online:2010-01-10

PDF

1785

被引次数

19 | 4

摘要：

    研究了甲基对硫磷和西维因在蒙脱石、高岭石和针铁矿表面的吸附解吸特征。结果表明，Langmuir方程能较好的描述甲基对硫磷和西维因在３种矿物表面的等温吸附过程，且蒙脱石对农药的最大吸附量大于高岭石和针铁矿。用动力学方程对2种农药的吸附过程进行拟合，Elovich方程、双常数方程和一级动力学方程均得到较好的结果，其中Elovich方程为最佳模型，相关系数（R2）在0.93～0.98之间，说明该吸附为非均相扩散过程。3种矿物对甲基对硫磷和西维因的吸附强度均为蒙脱石＞高岭石＞针铁矿。

关键词: 甲基对硫磷, 西维因, 粘土矿物, 吸附

Abstract:

??? Adsorption/desorption characteristics of methyl parathion and carbaryl on the surfaces of montmorillonite, kaolinite and goethite were investigated. The results show that the isotherm adsorption of??methyl parathion or carbaryl on clay minerals fitted Langmuir equation very well. Montmorillonite had a greater adsorption capacity for the two pesticides than goethite and kaolinite. Kinetics of methyl parathion or carbaryl adsorption could be described by First-order equation, Elovich equation and Two-constant equation. Elovich equation was the optimum model for their adsorption kinetics, the coefficients (R2) of which ranged between 0.93 and 0.98, indicating that the adsorption was a non-homogeneous diffusion process. The binding strength of methyl parathion and carbaryl on the minerals followed the sequence of montmorillonite > kaolinite > goethite.

Key words: methyl parathion, carbaryl, clay minerals, adsorption

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