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Distribution,sources, and ecological risk assessment of SVOCs in surface sediments from Guan River Estuary,China |
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| Authors: | Xinran He Xiaojuan Song Yong Pang Yiping Li Binlin Chen Zhihua Feng |
| Institution: | 1. College of Environment, Hohai University, No. 1 Xikang Road, Gulou District, Nanjing, 210098, China 2. Lianyungang Environmental Monitoring Central Station, No. 78 Haichang South Road, Xinpu District, Lianyungang, 222001, China 3. Lianyungang Environmental Protection Bureau, No. 78 Haichang South Road, Xinpu District, Lianyungang, 222001, China 4. College of Marine Science & Technology, Huaihai Institute of Technology, No. 59 Cangwu Road, Xinpu District, Lianyungang, 222005, China |
| Abstract: | The contamination of semi-volatile organic compounds (SVOCs) in the surface sediments of the Guan River Estuary, China was fully investigated. Total concentrations of 56 species of SVOCs ranged from 132 to 274 ng/g with an average of 186 ng/g (dry weight). Polycyclic aromatic hydrocarbon (PAH) concentrations were positively correlated with clay content and negatively correlated with sediment grain size. Source identification indicated that PAHs originated mainly from pyrolytic sources. However, intense ship traffic in the estuary may provide sources of petrogenic PAHs. Organochlorine pesticides (OCPs) mainly originated from direct input of dichlorodiphenyltrichloroethanes (DDTs) during some industrial processes. The SVOC concentrations were also compared with International Sediments Quality Guidelines and Sediments Quality Criteria, and the results indicated that negative biological impacts may originate from high concentrations of FLO, p,p′-DDE, and total DDTs. |
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