广西科学2016，Vol.23Issue(6)：548-554,7.DOI:10.13656/j.cnki.gxkx.20170103.002
毒死蜱在农田土壤中的迁移能力研究
Migration Ability of Chlorpyrifos in Different Agricul-tural Soil Profiles
摘要
Abstract
[Objective]This study was aimed to analyze the migration ability of chlorpyrifos in different kinds of agricultural soil profiles,as well as the corresponding pollution risk of groundwater.[Methods]The sorption characteristics of chlorpyrifos in different depth of soils from the north and south agricultural regions,including Changzhou,Shouguang,and Tianjin cities,were investigated using the batch sorption test.The adsorption kinetic and isotherm data were fitted by Linear and Freundlich models.The correlation between chlorpyrifos adsorption ability and physicochemical properties of soils was analyzed using the Spss 13.0 software.[Re-sults]Chlorpyrifos sorption by soils with different depth can be described by the pseudo-second-order (R2 =0.95 ~ 0.99)kinetics equation,and the topsoil of Changzhou exhibited lowest sorption rate towards chlorpyrifos.The sorption process can be well described by the Freundli-ch model (R2 =0.93~0.99).All of the topsoil in the three agricultural regions exhibited high-er sorption capacity for chlorpyrifos than that of the subsoil.The groundwater pollution risk of chlorpyrifos was estimated as follows:Chang-zhou>Shouguang>Tianj in.The results of cor-relation analysis showed that soil sorption capac-ity of chlorpyrifos was mainly depended by the content of soil organic matter and then the min-erals.[Conclusion]The adsorption behavior of chlorpyrifos to soils with depth can be described by two stages:Initial rapid adsorption and slow equilibrium process.The linear regression equation obtained by correlation analysis can be used to calculate the parameters such as Kf,n and Koc,which provides a simple and feasible method for obtaining values of indexes in groundwater pollution risk assessment.关键词
剖面土壤/毒死蜱/吸附特征/相关性分析/地下水污染风险Key words
soil profiles/chlorpyrifos/sorption characteristics/correlation analysis/groundwater pollution risk分类
资源环境引用本文复制引用
赵媛媛,付广义,许友泽,亓赟..毒死蜱在农田土壤中的迁移能力研究[J].广西科学,2016,23(6):548-554,7.基金项目
国家国际科技合作专项项目(2013DFG91190)资助。 （2013DFG91190）
