重庆市沿江流域土壤中有机氯农药的垂直分布特征(英文)  

Vertical Distribution of Organochlorine Pesticides in the Agricultural Soils along the Yangtze River in Chongqing,China

作　　者：温汉辉[1,2] 李杰 祁士华[1] 罗杰 高芳蕾 张茂忠 

机构地区：[1]中国地质大学环境学院,武汉430074 [2]广东省工程勘察院,广州510510 [3]延安环境科学研究所,陕西延安716000 [4]重庆市地质调查院,重庆400000

出　　处：《西南大学学报（自然科学版）》2010年第8期13-22,共10页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(40473043)

摘　　要：通过检测重庆市长江沿岸表层土壤(0-5cm)和深层土壤(0-20cm)中六六六和滴滴涕的含量发现,表层土壤中总六六六(包括α-六六六、β-六六六、γ-六六六、δ-六六六)和总滴滴涕(包括p,p-DDE、p,p-DDD、o,p-DDT、p,p-DDT)含量范围为0.185-1.374ng/g和0.807-38.281ng/g,分别对应深层的总六六六含量0.0795-1.692ng/g和总滴滴涕含量0.308-88.306ng/g.研究区内有机氯农药在土壤中的垂直分布反应了滴滴涕残留是"老"的来源,并证实了林丹的使用对该区域的有机氯农药污染有一定的影响.Concentrations of hexachlorocyclohexane （HCH） and dichlorodiphenyltrichloroethane （DDT） were determined in shallow subsurface （0~5 cm depth） and deep soil layers （5~20 cm depth） from the agricultural soils along the Yangtze River in Chongqing,China. Concentrations of total HCHs （including α-HCH,β-HCH,γ-HCH and δ-HCH） and total DDTs （including p,p＇-DDE,p,p＇-DDD,o,p＇-DDT and p,p＇-DDT） in shallow subsurface soils ranged from 0.185 to 1.374 ng/g,averaging 0.479 ng/g,and from 0.807 ng/g to 38.281 ng/g,averaging 7.274 ng/g,respectively,and those in the deeper layers ranged from 0.079 5 to 1.692 ng/g,averaging 0.564 ng/g,and from 0.308 to 88.306 ng/g,averaging 13.718 ng/g,respectively. The vertical distribution of HCHs and DDTs suggested that DDT residues resulted from ＂old＂ sources and that the contamination of HCHs in this region was partially attributed to the local use of lindane.

关 键 词：垂直分布 有机氯农药 重庆 土壤 

分 类 号：X592.031[环境科学与工程—环境工程]