title: Distribution and sources of organochlorine pesticides (OCPs) in sediments from upper reach of Huaihe River, East China.
abstract: Residues of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) and their environmental risks in surface sediments collected from upper reach of Huaihe River, East China, are investigated in this paper. Based on dry weight (dw), the concentrations of ΣHCH (α-, β-, γ- and δ-HCH) and ΣDDT (p,p'-DDT, o,p'-DDT, p,p'-DDE, p,p'-DDD) in sediments ranged from 1.95 to 11.05 ng g(-1) dw (mean 4.53 ng g(-1)dw) and 4.07 to 23.89 ng g(-1)dw (average 11.07 ng g(-1)dw), respectively. Compared with some published guideline values of organochlorine pesticides (OCPs) in sediments, the concentrations of HCHs were at safe levels while the residues of DDTs would pose adverse biological effects in this studied area. The distribution of OCPs in sediments indicated that the input of tributaries was important factor for Huaihe River. Levels of DDTs in the sediments were influenced by total organic carbon contents of sediments. The present study suggested that historical usage of lindane and technical DDT was the main reason for OCP residues in the sediments from both rivers and lakes. Furthermore, the composition of DDTs reflected fresh inputs of dicofol mixture in this region.
authors.affiliation: College of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan 453007, PR China. Electronic address: sunjh_hj@yahoo.com.cn.
authors.forename: Jianhui
authors.initials: J
authors.lastname: Sun
authors.affiliation: College of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan 453007, PR China. Electronic address: fengjl23@yahoo.com.cn.
authors.forename: Jinglan
authors.initials: J
authors.lastname: Feng
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China. Electronic address: ldqun@yahoo.com.cn.
authors.forename: Qun
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
authors.forename: Qilu
authors.initials: Q
authors.lastname: Li
mesh_terms: D002681:China; D005618:Fresh Water / Q000737:chemistry; D019015:Geologic Sediments / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides