Assessment of metal contamination in surface sediments from Zhelin Bay,the South China Sea |
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| Institution: | 1. College of Life Science and Technology, Jinan University, Guangzhou 510632, China;2. Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China;1. Key Laboratory of Marine Hydrocarbon Resources and Environment Geology, Ministry of Land and Resources, Qingdao 266071, China;2. Qingdao Institute of Marine Geology, Qingdao 266071, China;3. Key Laboratory of Coastal Wetland Biogeosciences, China Geologic Survey, Qingdao Institute of Marine Geology, Qingdao 266071, China;1. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;2. Key Laboratory of Coastal Wetland Biogeosciences, China Geological Survey, Qingdao 266071, China;3. Qingdao Institute of Marine Geology, Qingdao 266071, China;4. Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;1. Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China;2. College of Urban and Environmental Sciences, Tianjin Normal University, Tianjin 300387, China;1. Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China;2. Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China;3. Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), 511458, China;4. South China Institute of Environmental Science, Ministry of Ecology and Environment, Guangzhou, 510530, China |
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| Abstract: | Metals and biogenic elements were analyzed from surface sediments collected from Zhelin Bay in the South China Sea in December 2008. The high concentrations of TOC, TN and BSi indicate the high nutrient level and diatom productivity in Zhelin Bay. The concentrations of metals were generally far lower than the effects-range-low (ERL) values that define pollutant levels. Enrichment factors (EF) and geoaccumulation indices (Igeo) suggest there are pollution levels of Cd, Cu and Zn at some stations. As, Cu, and Pb are potentially biotoxic in some stations. Correlation and principal component analyses indicate that most of the metals primarily originate from natural sources, and from maricultural activities as well. Mariculture contributes considerable Cd and Cu contamination. As and Pb comes primarily from combustion of gasoline and diesel fuel by ships. |
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| Keywords: | Heavy metals Biogenic elements Marine sediments South China Sea Sediment quality criteria |
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