Journal
MARINE POLLUTION BULLETIN
Volume 100, Issue 1, Pages 534-543Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2015.09.001
Keywords
Heavy metal; Environment quality; Sediment; Central Bohai Sea
Funding
- opening foundation of the Key Laboratory of Marine Sedimentology and Environmental Geology, SOA, China [MASEG201204]
- opening foundation of the Key Laboratory of Submarine Geosciences and Technology of Ministry of Education, China [201362026]
- State Oceanic Administration public projects of China [201105003-06]
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The heavy metals (Cu, Co, Ni, Zn, Cr, Pb, Cd) in surface and core sediments from the central Bohai Sea were analyzed to evaluate the temporal/spatial distribution and pollution status. Cd exhibited gradual increase vertically, while others were stable or declined slightly in core sediments. In surface sediments, metals showed higher values in 'central mud area of the Bohai Sea' and the coastal area of the Bohai Bay. Cd and Pb also had high levels in the northeastern part of Bohai Sea. Both the contamination factors (CFs) and the geo-accumulation index (I-geo) indicated that Cu, Co, Ni, and Cr were not at pollution levels, while Pb, Zn, and Cd indicated moderate contamination. Compared with sediment quality guidelines (SQGs), Cu, Zn, Cr, Pb, and Cd were likely to produce occasional adverse biological effects, while Ni showed possible ecotoxicological risks. The combined levels of the metals have a 21% probability of being toxic. (C) 2015 Elsevier Ltd. All rights reserved.
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