Topsoil dichlorodiphenyltrichloroethane and polychlorinated biphenyl concentrations and sources along an urban-rural gradient in the Yellow River Delta

作     者：Wenjun Xie Aiping Chen Jianyong Li Qing Liu Hongjun Yang Tao Wu Zhaohua Lu 

作者机构：Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta Binzhou University Binzhou 256603 China. Institute of Restoration Ecology China University of Mining and Technology Beijing 100083 China Jinan Entry-Exit Inspection and Quarantine Bureau Jinan 250000 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第9期

页      面：1655-1661页

核心收录：

学科分类：090403[农学-农药学(可授农学、理学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 083001[工学-环境科学] 08[工学] 09[农学] 0904[农学-植物保护] 

基　　金：supported by the Scientific Award Fund for the Excellent Middle-Aged and Young Scientists of Shandong Province(No.2008BS09024) the Science and Technology Development Project of Binzhou City(No. 200818) the Science and Technology Development Project of Shandong Province(No.2009GG10006012) 

主　　题：DDTs PCBs Yellow River Delta source apportionment risk assessment 

摘      要：The Yellow River Delta （YRD） is a typical agricultural and petrochemical industrial area of China. To assess the current status of soil dichlorodiphenyltrichloroethane （DDT） and polychlorinated biphenyls （PCB） residues, topsoil samples （0-15 cm） （n = 82） were collected in Bincheng District, at the geographic center of the YRD. The total concentrations of six DDT homologues were within 3.3-3819 ~tg/kg, with a mean concentration of 191 ~tg/kg, showing significant increase along urban-rural gradient. Soil concentrations of seven indicator PCBs in the area ranged from non-detectable to 87.0 ~g/kg, dominated by heavily chlorinated PCBs （PCB-101 and -118）. Soil PCBs concentrations were significantly greater in urban than suburban and rural areas. Principal component and multiple linear regression analysis suggest that 86.4% of soil DDTs originate from past DDT usage, and 13.6% originate from dicofol application. Soil PCBs most likely originate from the petrochemical industry （77.1%）, municipal solid waste disposal （16.5%）, local commercial PCB homologues usage （5.2%）, and long-range atmospheric deposition （1.2%）. In general, soil DDTs pollution was classified as low level, and mean PCBs concentrations were below the severe contamination classification range. Because PCB-118 is a dioxin-like congener, monitoring and remediation is advised to assess and reduce negative environmental and human health effects from soil DDTs and dioxin-like congeners in the study area.