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荧光猝灭滴定法研究土壤腐殖质与氨基甲酸酯类农药相互作用

施国兰 郑博福 白英臣 吴丰昌 吴代赦

施国兰, 郑博福, 白英臣, 吴丰昌, 吴代赦. 荧光猝灭滴定法研究土壤腐殖质与氨基甲酸酯类农药相互作用[J]. 环境科学研究, 2012, 25(12): 1404-1409.
引用本文: 施国兰, 郑博福, 白英臣, 吴丰昌, 吴代赦. 荧光猝灭滴定法研究土壤腐殖质与氨基甲酸酯类农药相互作用[J]. 环境科学研究, 2012, 25(12): 1404-1409.
SHI Guo-lan, ZHENG Bo-fu, BAI Ying-chen, WU Feng-chang, WU Dai-she. Study on the Interaction between Humic Substances in Soil and Carbamate Pesticides Using Fluorescence Quenching Titration Method[J]. Research of Environmental Sciences, 2012, 25(12): 1404-1409.
Citation: SHI Guo-lan, ZHENG Bo-fu, BAI Ying-chen, WU Feng-chang, WU Dai-she. Study on the Interaction between Humic Substances in Soil and Carbamate Pesticides Using Fluorescence Quenching Titration Method[J]. Research of Environmental Sciences, 2012, 25(12): 1404-1409.

荧光猝灭滴定法研究土壤腐殖质与氨基甲酸酯类农药相互作用

基金项目: 国家自然科学基金项目(40873080,41173084,40903036)

Study on the Interaction between Humic Substances in Soil and Carbamate Pesticides Using Fluorescence Quenching Titration Method

  • 摘要: 为研究氨基甲酸酯类农药在溶解有机质参与下的迁移转化过程,利用荧光猝灭滴定法研究了土壤HS(腐殖质)与氨基甲酸酯类农药的相互作用. 结果表明,呋喃丹和西维因的荧光都能不同程度地被FA(富里酸)和HA(腐殖酸)猝灭,主要猝灭机理为静电结合猝灭. 采用静态猝灭模型计算出氨基甲酸酯类农药与HS的K(结合常数),lg K由大到小为呋喃丹-HA(4.96)>西维因-HA(4.93)>呋喃丹-FA(4.72)>西维因-FA(4.68). HA与氨基甲酸酯类农药的lg K明显大于FA与氨基甲酸酯类农药,表明HS与氨基甲酸酯类农药间的作用力有疏水作用. 进一步研究表明,氢键作用对HS与氨基甲酯类农药结合有一定的影响.

     

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出版历程
  • 收稿日期:  2012-06-29
  • 修回日期:  2012-10-11
  • 刊出日期:  2012-12-25

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