title: Organochlorine pesticides in particulate matter of Beijing, China.
abstract: Eighteen organochlorine pesticides (OCPs) in air particulate matter (PM) samples collected from 20 sites in Beijing, China in 2005 and 2006 were analyzed to determine the composition, spatial distribution and sources. Total OCPs of PM2.5 and PM10 ranged from 32.59 pg m(-3) to 9232.31 pg m(-3) and 80.96 pg m(-3) to 9434.97 pg m(-3), respectively, categorized as heavier pollution compared to other cities of China. Among six kinds of functional zones involved, commercial areas and industrial centers were heavily polluted. Distinct concentrations variations were detected in PM with different particle diameters. Pollution distribution was spatially heterogeneous inside the city. The most heavily polluted sites located in the southeast part of the city, where laid many chemical factories. Compositional analysis and principal component analysis (PCA) suggested that past usage of OCPs was the main source, though there were new inputs in some sites.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Wang
authors.forename: Xinghong
authors.initials: X
authors.lastname: Li
authors.forename: Hangxin
authors.initials: H
authors.lastname: Cheng
authors.forename: Xiaobai
authors.initials: X
authors.lastname: Xu
authors.forename: Guangmin
authors.initials: G
authors.lastname: Zhuang
authors.forename: Chuandong
authors.initials: C
authors.lastname: Zhao
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002681:China; D002947:Cities; D004726:Endosulfan / Q000032:analysis; D004784:Environmental Monitoring; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D052638:Particulate Matter / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D006843:Hydrocarbons, Chlorinated; D052638:Particulate Matter; D010575:Pesticides; D004726:Endosulfan