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PAHs in aquatic sediment in Hangzhou, China: Analytical methods, pollution pattern, risk assessment and sources


ZHU Li-zhong , CAI Xe-fen , WANG Jing

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Received January 11, 2005,Revised March 02, 2005, Accepted , Available online

Volume 17,2005,Pages 748-755

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Eleven surface sediment samples, from the Qiantang River, West Lake, Jinghang Canal and the inland river of Hangzhou Section were collected to investigate 17 PAHs pollution in aquatic sediments of Hangzhou. Accelerated solvent extraction(ASE) was used to extract PAHs from sediments with satisfactory recoveries. It was foung that the total PAHs in the sediments ranged from 308.4 to 3037 ng/g dw, and PAHs pollution in sediments from Jinghang Canal were the heaviest. Lowest effect level(LEL) and severe effect level(SEL) sediment quality guidelines were introduced to perform risk assessment for PAHs pollution in aquatic sediments. Only one sample in Jinghang Canal had adverse impact on benthic organism. 2-3 ring PAHs had a noticeable contribution to total PAHs, especially NA, PHEN. A quantity method was used to determine the major source, the results showed petroleum origin was the chief source to PAHs pollution in all sediments with the exception of sediments from Jinghang Canal where combustion sources had a larger contribution.

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