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Sedimentary record of hydrophobic organic compounds in relation to regional economic development: A study of Taihu Lake, East China |
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| Authors: | Guoqing Liu Gan Zhang Zhangdong Jin Jun Li |
| Institution: | a Institute of Applied Nuclear Technology, Shenzhen University, Shenzhen 518060, China b State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China c Yantai Institute of Coastal Zone for Sustainable Development, Chinese Academy of Sciences, Yantai 264003, China d State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China |
| Abstract: | Sediment cores taken from Taihu Lake, East China were analyzed for polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and polybrominated biphenyl ethers (PBDEs). The results showed a general sharp increase of HCH, DDT, PAH and PBDE concentrations in the surface layers, corresponding to a sedimentation time of 1980 and 1990 onward in the Meiliang Bay and Xukou Bay, respectively. The source of PAHs has largely transferred from petrogenic to pyrogenic origin, and good relationships were observed between sediment PAH concentrations and the regional gross domestic product. The sharp increase of DDTs in recent years may be related to the mobilization and migration of these chemicals from surface soil to lake sediment, as a result of enhanced soil run-off due to large scale land transform, as well as the contribution of current usage of dicofol and DDT-containing anti-fouling paints. |
| Keywords: | Sediment record Hydrophobic organic compounds Taihu Lake |
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