摘要
应用GC-ECD的方法,研究了绵阳市典型土壤垂直剖面中有机氯农药的纵向分布特征。结果表明:表层土壤(0~20 cm)中,游仙区耕田区HCH含量最高,其次是三台县耕田区,江油市。表层土壤(0~5 cm)中,三台县DDT含量明显高于其他区域同一层段的含量。表层土壤(5~20 cm)中,游仙区耕田区DDT含量最高,其次是三台县耕田区,江油市。有机氯农药的残留量在土壤剖面的纵向分布总体上是随着土壤剖面的加深而降低。HCH的4个异构体的残留量与工业组成相比较有显著差异。总体来说在三个土壤柱中,γ-HCH的质量分数最高,而δ-HCH的最低。p,p′-DDT/p,p-′DDE的平均值分别为:0.14,0.03,0.59。表明江油市和游仙区目前土壤中检测到的只是过去使用后的残留物。三台县有新的DDT输入。
The vertical distribution of organochlorine pesticides in soils in the area of Mianyang City was studied using GC-ECD.The results showed that in the surface soils with 0~20 cm depth,the highest concentration of HCH was observed in the farming land of Youxian District,followed by Santai County and Jiangyou City.In the surface soils with 0~5 cm depth,the concentration of DDT in Santai County was significantly higher than that in other regions else.In the surface soils with 5~20 cm depth,the highest concentrat...
出处
《四川环境》
2008年第3期1-5,33,共6页
Sichuan Environment
基金
四川省成都经济区区域土壤有机地球化学(有机氯农药)调查(2006040007)
关键词
成都
有机氯农药
土壤
纵向分布
Chengdu
organochlorine pesticides
soil
vertical distribution
