铜与农药氰戊菊酯及莠去津在果园土壤中的交互吸附研究  

Interaction Adsorption of Copper Ions with Pesticides Fenvalerate and Atazine in Orchard Soil

作　　者：初亚飞[1] 谢吉民[1] 刘军[1] 郭会琴[2] 孙成[2] 

机构地区：[1]江苏大学化学化工学院,江苏镇江212013 [2]南京大学环境学院,污染控制与资源化研究国家重点实验室,江苏南京210093

出　　处：《农业环境科学学报》2009年第10期2064-2068,共5页Journal of Agro-Environment Science

基　　金：国家自然科学基金(20677025);江苏省社会发展项目(BS2006052);江苏省工业高技术研究项目(BG2007025)

摘　　要：采用批量平衡法研究了氰戊菊酯及莠去津单独或与铜共存时在果园土壤中的交互吸附特性,分别测定其有机碳标化分配系数Koc,给出吸附等温线。结果表明,氰戊菊酯添加铜前后在土壤中的吸附均可采用Freundlich经验方程较好地描述,Cu2+的存在使氰戊菊酯的吸附量大大增加;莠去津与Cu2+共存时吸附等温线符合Langmuir经验方程,Cu2+降低了莠去津在土壤中的吸附。比较两种农药的Koc可以发现,氰戊菊酯的吸附常数Kd值远远大于莠去津,这和有机物的水溶性及正辛醇-水分配系数Kow大小有关。The adsorption of atazine （AT） and fenvalerate （Fenv） with copper in the orchard-soil were studied by using batch equilibrium method. The adsorption coefficient of organic chemicals（Ka） of AT and Fenv on soil were determined. The results exhibited that Fenv with or without adding copper adsorption isotherms could fit Freundlich equation well, the adsorption of Fenv increased when existed Cu2＋. The adsorption isotherms could fit Langmuir equation when coexistence of Fenv and Cu2＋, but the adsorption capacity reduced when existence Cu2＋. Comparison of coefficient K＋ of two pesticides could be found that the adsorption constant of Fenv was much larger than AT, which was ralated to the water solubility of organic matter and the size of Kow.

关 键 词：铜 莠去津 氰戊菊酯 果园土壤 吸附 

分 类 号：X53[环境科学与工程—环境工程]