松花江一级阶地包气带岩性特征及其对农药吸附与降解的影响  

Lithologic characteristics of the unsaturated zone and its impact on adsorption and degradation of pesticide in the first grade terrace of Songhua River

作　　者：刘广民 林学钰[2] 董维红[2] 姜桂兰[1] 赵淑洁[1] 

机构地区：[1]吉林大学化学学院 [2]吉林大学环境与资源学院,吉林长春130026

出　　处：《吉林大学学报（地球科学版）》2004年第1期125-127,共3页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金资助项目(49872083)

摘　　要：对松花江一级阶地包气带的岩性特征分析结果表明,三层介质均为砂土,有机质和粘土矿物含量较少,水的渗透系数由表层到深层显著增大。阿特拉津在三层介质中的吸附系数依次为1.2mL/g、0.6mL/g和0.2mL/g,自然降解半衰期为124d、153d和225d,能够长期残留在包气带中,构成对地下水的威胁。The unsaturated zone is divided into three layers in which the media is mainly sandy soil. The amount of organic matter and clay mineral are relatively less. The value of permeability coefficients is getting larger from the surface to the deep layer distinctively. The results of the adsorption and the natural degradation experiments show that the adsorption coefficients of Atrazine in the three layers are 1.2 mL/g, 0.6 mL/g and 0.2 mL/g respectively, and the half-life periods of natural degradation are 124 d, 153 d and 225 d, respectively. The Atrazine can remain in the unsaturated zone for a long time and eventually result in groundwater pollution.

关 键 词：一级阶地 包气带 岩性特征 阿特拉津 吸附 降解 

分 类 号：P641.131[天文地球—地质矿产勘探] X592[天文地球—地质学]