Polycyclic aromatic hydrocarbons (PAHs) and Pb isotopic ratios in a sediment core from Shilianghe Reservoir,eastern China: Implying pollution sources |
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| Affiliation: | 1. College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China;2. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;3. Key Laboratory of Coastal Wetland Biogeosciences, China Geological Survey, Qingdao 266071, China;4. Eastern China Geological & Mining Organization for Non-ferrous Metals in Jiangsu Province, Nanjing 210007, China;1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;2. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China;3. First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;1. Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada;2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;1. School of Geography, Nanjing Normal University, 1 Wenyuan Road, Qixia, Nanjing 210023, China;2. Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing 210023, China;3. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China |
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| Abstract: | ![]()
The history records of polycyclic aromatic hydrocarbons (PAHs), lead and its stable isotope ratios were determined in a sediment core to receive anthropogenic impacts on the Shilianghe Reservoir in eastern China. The historical changes of PAHs concentrations, PAHs fluxes, Pb/Al and Pb isotope ratios showed a synchronous trend throughout the core, suggesting changes in energy usage and correlating closely with the experience of a rapid economic and industrial development of the catchment, Linyi City in eastern China. PAHs isomer ratios results reveal PAHs in sediments are dominantly anthropogenic pyrogenic source, dominated by the combustion of coal and biomass. Furthermore, the Pb isotopic composition also clearly indicates that coal combustion dust mainly contributed to the Pb burden in the reservoir sediments. Based on mix end member model of Pb isotope ratios, coal combustion dust dominated anthropogenic Pb sources over fifty years contributing from 31% to 62% of total Pb in sediment. And the contribution of leaded gasoline was low than average 25%. In addition, a stable increase of coal combustion source was found in sediment core, while the contribution of leaded gasoline had declined in recent decades, with the phase-out of leaded gasoline in China. |
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| Keywords: | Anthropogenic input PAHs Lead isotopes Reservoir sediments Sediment accumulation rates Source identification |
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