有机氯农药在湖北省菜地土壤中的污染研究

Study on the Pollution of OCPs in Vegetable Soils from Hubei

采集了湖北省武汉、宜昌、襄阳地区的45个菜地土壤样品,测定其中11种有机氯农药的残留量,并对其残留特征和污染来源进行了研究分析。结果表明,所有土壤样品中均检出有机氯农药,但大多数点位的污染物含量均低于相关标准限值,通过数据统计和因子分析法得出p,p’-DDT、p,p’-DDE为主要污染物。计算特征比值后发现,该地区滴滴涕污染可能源于传统工业滴滴涕和三氯杀螨醇的混合源,既有早期污染也有新污染的输入,六六六污染主要源于林丹,氯丹残留主要源于早期污染。

In present study,45 samples of vegetable soils were collected from Wuhan,Yichang and Xiangyang of Hubei Province.The residues of 11 OCPs in soils were analyzed for assessing their concentrations and sources. Results showed that OCPs were detected in all soil samples,but the content of OCPs in most of samples was lower than the standard value. Based on data statistics and factor analysis,p,p＇-DDT and p,p＇-DDE were the major pollutants. By the characteristic ratio method,DDTs residues mainly both came from either early or recently input of traditional industrial DDTs or dicofol. HCHs originated mainly from lindane,and chlordane mainly came from early input.