AI Article Synopsis
- Twelve sediment cores were collected in western Bohai Bay and nearby estuaries to study metal pollution.
- Although trace metals met China's Marine Sediment Quality criteria, enrichment factors indicated pollution with Ag, Cd, Cr, Cu, and Zn in the estuaries and Port of Tianjin.
- Risk analysis highlighted elevated Ag and Ni levels potentially harmful to biological health, while some metals showed increasing concentrations over time.
Article 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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| http://dx.doi.org/10.1016/j.jenvman.2010.11.020 | DOI Listing |
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