Metal contamination in sediments of the western Bohai Bay and adjacent estuaries, China |
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Authors: | Feng Huan Jiang Hongyou Gao Wensheng Weinstein Michael P Zhang Qiufeng Zhang Weiguo Yu Lizhong Yuan Dekui Tao Jianhua |
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Affiliation: | Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ 07043, USA. fengh@mail.montclair.edu |
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Abstract: | Twelve sediment cores were collected in July 2007 in open waters of western Bohai Bay, the Port of Tianjin, and the adjacent estuaries of the Haihe and Yongding Rivers. While overall concentrations of trace metals at incremental depths in these cores met the Marine Sediment Quality (GB18668-2002) criteria of China, the magnitude of both metal enrichment factors (EF) and geoaccumulation indices (I(geo)) suggested that pollution with Ag, Cd, Cr, Cu and Zn was occurring in the estuaries and Port. Risk analysis also suggested that Ag and Ni concentrations were sufficiently elevated as to cause adverse biological effects in the study area. Although metal concentrations in western Bohai Bay were of less concern, a positive relationship between EF values and excess (210)Pb activity for several metals suggested that their concentrations were increasing over time. |
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Keywords: | Bohai Bay Urban estuary Port of Tianjin Sediment metal contamination Environmental assessment |
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