Anthropogenic pollution and oxygen depletion in the lower Yangtze River as revealed by sedimentary biomarkers |
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| Institution: | 1. Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK;2. Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, PR China;1. TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, PR China;2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, PR China;3. Tianjin Key Laboratory of Composite and Functional Materials, and Key Lab of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin 300072, PR China;4. Environmental Remediation Materials Unit, and International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan;1. Heisenberg Group Marine Kerogen, and Micropaleontology Group, Division Marine Palynology, Marum Research Faculty, Universität Bremen, Leobener Straße 8, D-28359 Bremen, Germany;2. Organic Geochemistry Group, Marum Research Faculty, Universität Bremen, Leobener Straße 8, D-28359 Bremen, Germany;1. LUNAM Université, LTN UMR CNRS 6607, B.P. 50609, 1 rue Christian Pauc, 44306 Nantes Cedex 3, France;2. LUNAM Université, GEPEA UMR CNRS 6144, B.P. 406, 37 boulevard de l’Université, 44602 Saint Nazaire, France;3. Istituto Motori – CNR, Via Marconi 8, 80125 Napoli, Italy;1. Lawrence Berkeley National Laboratory, Berkeley, CA, USA;2. Pacific Northwest National Laboratory (PNNL), Richland, WA, USA;1. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd., Changchun, Jilin 130102, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. USGS Louisiana Water Science Center, Sherwood Forest Blvd., Baton Rouge, LA 70816, USA |
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| Abstract: | The Yangtze River receives 37.5% of the municipal sewage of China, whose fate constitutes a major environmental and health concern. This study applied phytosterols, 5β(H)-stanols, tetrahymanol and 17α,21β(H)-C30-hopane to examine sewage and petroleum-derived organic pollutants, and assess their impact on the biogeochemistry of the lower river benthic environment. The results showed that significant contributions from sewage and petroleum pollutants were preserved in the riverbed. These potentially contributed to O2 depletion and apparently an anoxic environment in the riverbed, either directly or via an impact on primary productivity. |
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