Residual Levels and New Inputs of Chlorinated POPs in Agricultural Soils from Taihu Lake Region

编号 zgly0000372514

文献类型 期刊论文

文献题名 Residual Levels and New Inputs of Chlorinated POPs in Agricultural Soils from Taihu Lake Region

学科分类 220.1040;森林土壤学

作者 GAOHong-Jian  JIANGXin  WANGFang  BIANYong-Rong  WANGDai-Zhang  DENDJian-Cai  YANDong-Yun 

作者单位 InstituteofSoilScience 

母体文献 Pedosphere;土壤圈: 英文版 

年卷期 2005,15(3)

页码 301-309

年份 2005 

分类号 S153.61  S482.32 

关键词 有机氯杀虫剂  农药残留  太湖区域  土壤成分 

文摘内容 Selected persistent organochlorine pesticides (OCPs), including 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT)and its principal metabolites 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (DDE) and 1,1-dichloro-2,2-bis(p-chlorophenyl)ethane (DDD), hexachlorocyclohexane (HCH) and its isomers (α-, β, γ-, and δ-HCH), hexachlorobenzene (HCB), endosulfan, dieldrin, and endrin were quantified to determine current levels of organochlorine pesticides, to assess the ecotoxicological potential, and to distinguish previous and current inputs in agricultural soils from the Taihu Lake region.Gas chromatography equipped with a 63Ni electron-capture detector (GC-ECD) system was employed. Thirteen OCPs were detectable in all soil samples, with DDTs being the main residues, and HCHs had the second highest level of OCP residues. Although OCP residual levels were lower than those in 1990s, the residual levels for most of the DDTs and some of HCHs were still higher than the national environmental standards for agricultural soils. The ratios of DDT/DDE and γ-/α-HCH in twelve soils indicated that new inputs could be present in the soils. Thus, efforts should be made to completely ban the production of OCPs and their use in agriculture so as to reduce the threat of OCPs to food quality and human health。