Heavy metals in surface sediments from nine estuaries along the coast of Bohai Bay,Northern China |
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| Institution: | 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. South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;2. Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China;3. Key Laboratory of Fishery Ecology and Environment, Guangdong Province, China;4. Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China;1. School of Earth Sciences, The University of Queensland, St Lucia, Qld 4072, Australia;2. The Australian National Centre for Groundwater Research and Training, Australia;1. Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China;2. College of Chemistry and Materials Science, Ludong University, Yantai, Shandong 264001, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China;2. Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology, Shandong Academy of Sciences Institute of Oceanographic Instrumentation, Qingdao 266001, China;3. Korea Institute of Ocean Science and Technology, Hean-ro 787, Ansan, Kyonggi 426-744, Republic of Korea |
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| Abstract: | Concentrations of heavy metals in river water and sediment were investigated in nine estuaries along the coast of Bohai Bay, Northern China. Multivariate statistical techniques such as principal component analysis and cluster analysis, in combination with metal concentration analysis and correlation analysis, were used to identify the possible sources of the metals and the pollution pattern in nine estuaries along the coast of Bohai Bay. The environmental risks of metals, evaluated by sediment quality guidelines and background values, revealed Hg contamination in the estuaries. However, levels of Cd in estuarine sediments were low, and they were less than those levels in river sediments, partly due to the high mobility and dilution of river or seawater. Cd did not contribute to sediment deposits in estuaries. High organic matter from effluents from large municipal sewage treatment plants was predominantly responsible for restricting Hg mobility from the river to Bohai Bay. |
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| Keywords: | Heavy metals Sewage Sediment Estuary Multivariate analysis Bohai Bay |
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