天津市郊污灌区农田土壤中的有机氯农药残留

Organochlorine Pesticide Residues in Agricultural Soils from Tianjin

采用农田现场采样及室内测试方法,分析了天津地区污灌农田代表性样地BHC及DDT等8种有机氯农药的残留状况。结果表明,各污染物的检出率均为100%,该地区有机氯污染物以β-BHC和p,p'-DDE为主,β-BHC的最高残留量达到了12.84μg·g-1。常年污灌的样地污染程度最严重,而无污水灌溉的旱地污染较轻。

Eight organochlorine pesticides including -BHC,β-BHC, γ-BHC,δ-BHC, p,p'-DDE, p,p'-DDD, p,p'-DDT, and o,p'-DDT were measured in agricultural soils from Tianjin. The soils were collected from soils with or without wastewater irrigation. All chemicals studied were detectable in thesesamples. The dominant species among BHC isomers DDT metabolites are β-BHC and p,p'-DDE, respectively. The total BHC isomers and total DDT metabolites in a wastewater irrigated vegetable fields was 4.037 and 2.702 μg·g-1 in dry weight, respectively.