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Yangtze Three Gorges Reservoir, China: A holistic assessment of organic pollution, mutagenic effects of sediments and genotoxic impacts on fish

引用

Journal of Environmental Sciences 2015年第12期27卷 63-82页

作者： Tilman Floehr Bj?rn Scholz-Starke Hongxia Xiao Josef Koch Lingling Wu Junli Hou Anja Wolf axel bergmann Kerstin Bluhm Xingzhong Yuan Martina Ro?-Nickoll Andreas Sch?ffer Henner Hollert Department of Ecosystem Analysis Institute for Environmental ResearchRWTH Aachen University Key Laboratory of Yangtze River Water Environment Ministry of EducationTongji University East China Sea Fisheries Research Institute IWW Rhenish-Westfalian Institute for Water Research Institute for Applied Geosciences Technische Universit?t Darmstadt College of Resources and Environmental Science Chongqing University State Key Laboratory of Pollution Control and Research Reuse School of the EnvironmentNanjing University

Besides obvious benefits,the Three Gorges Dam＇s construction resulted in new pollution scenarios with the potentials to threaten the Three Gorges Reservoir（TGR） *** order to record organic contamination,to find links to ecotoxicological impacts and to serve as reference for ensuing monitoring,several sites in the TGR area were screened applying the triad approach with additional lines-of-evidence as a holistic assessment *** and the benthic fish species Pelteobagrus vachellii were sampled in 2011 and 2012 to determine organic pollution levels,mutagenic potentials and genotoxic *** regional hot-spots near the cities of Chongqing and Kaixian were identified and further investigated in *** polycyclic aromatic hydrocarbons（PAHs） could be detected in sediments in 2011（165-1653 ng/g）,emphasizing their roles as key pollutants of the *** ubiquity was confirmed at Chongqing（150-433 ng/g） and Kaixian（127-590 ng/g） *** were comparable to other major Chinese and German ***,the immense sediment influx suggested a deposition of 216-636 kg PAH/day（0.2-0.6 mg PAH/（m2·day））,indicating an ecotoxicological *** source analysis highlighted primary impacts of combustion sources on the more industrialized upper TGR section,whereas petrogenic sources dominated the mid-low ***,sediment extracts from several sites exhibited significant activities of frameshift promutagens in the Ames fluctuation ***,significant genotoxic impairments in erythrocytes of *** were detected（Chongqing/Kaixian）,demonstrating the relevance of genotoxicity as animportant mode of action in the TGR＇s ***,their derivatives and non-target compounds are considered as main causative agents.

关键词： Yangtze Three Gorges Reservoir Triad approach Sediment Fish Mutagenicity Genotoxicity PAH

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