Heavy metal contamination in surface sediments: A comprehensive, large-scale evaluation for the Bohai Sea, China

Wang，Xuejing1,2; Fu，Renlong3; Li，Hailong1,2,4; Zhang，Yan4,5; Lu，Meiqing1,2; Xiao，Kai1,2; Zhang，Xiaolang1,2; Zheng，Chunmiao1,2; Xiong，Ying1,2

2020-05-01

10.1016/j.envpol.2020.113986

ENVIRONMENTAL POLLUTION   影响因子和分区

0269-7491

1873-6424

Heavy metal contamination in the Bohai Sea (China) has been the focus of many studies, but most of them only focused on local pollution levels and thus lacked high spatial resolution for the whole sea. In this study, heavy metals (i.e., As, Cr, Cu, Cd, Pb, Zn, and Fe) in surface sediments were analyzed to assess the spatio-temporal pollution conditions of the Bohai Sea, an important coastal environment consisting of Bohai Bay, Laizhou Bay, and Liaodong Bay. The results indicated that the heavy metal concentration in the sediments was in the range of 6.43–32.18 mg/kg for As, 14.90–58.07 mg/kg for Cr, 3.90–27.19 mg/kg for Cu, 0.04–0.27 mg/kg for Cd, 11.09–30.95 mg/kg for Pb, 18.76–65.58 mg/kg for Zn, and 0.78%–2.55% for Fe. The distribution of heavy metals revealed that the concentrations were relatively low in Laizhou Bay, very high in the northwest coastal region of the Bohai Sea, and decreased from near-shore to off-shore areas. Moreover, both the enrichment factor and geo-accumulation index demonstrated that there was no contamination to be found for Cr, Cu, Zn in the region and a slight to moderate pollution of As, Cd, and Pb. Cd and As presented considerable potential ecological risk as a result of their high toxicity. The potential ecological risk index (RI) suggested that a third of the areas (northwest coastal area of the Bohai Sea) has moderate ecological risk. The risk area was generally decreased as offshore distance increased, which suggested that the contamination and risk of heavy metals are influenced by anthropogenic activities. Heavy metals, especially Cd and As, presented more serious contamination and potential ecological risk in the northwest coastal areas and estuaries of the Bohai Sea.

Bohai sea Contamination assessment Heavy metals Surface sediments

EI ; SCI

英语

第一 ; 通讯

Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology[2017B030301012] ; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex[] ; National Natural Science Foundation of China[41702266]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000528537600089

Elsevier Ltd

20200408085371

Coastal zones ; Contamination ; Marine pollution ; Offshore oil well production ; Surficial sediments

Water Pollution:453 ; Marine Science and Oceanography:471 ; Soil Mechanics and Foundations:483 ; Oil Field Production Operations:511.1 ; Metallurgy and Metallography:531

ENVIRONMENT/ECOLOGY

2-s2.0-85078121737

Scopus

1.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Beijing Geotechnical and Investigation Engineering Institute,Beijing,100086,China
4.State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Beijing,100083,China
5.MOE Key Laboratory of Groundwater Circulation & Environment Evolution,School of Water Resources and Environment,China University of Geosciences-Beijing,Beijing,100083,China

Wang，Xuejing,Fu，Renlong,Li，Hailong,et al. Heavy metal contamination in surface sediments: A comprehensive, large-scale evaluation for the Bohai Sea, China[J]. ENVIRONMENTAL POLLUTION,2020,260.

Wang，Xuejing.,Fu，Renlong.,Li，Hailong.,Zhang，Yan.,Lu，Meiqing.,...&Xiong，Ying.(2020).Heavy metal contamination in surface sediments: A comprehensive, large-scale evaluation for the Bohai Sea, China.ENVIRONMENTAL POLLUTION,260.

Wang，Xuejing,et al."Heavy metal contamination in surface sediments: A comprehensive, large-scale evaluation for the Bohai Sea, China".ENVIRONMENTAL POLLUTION 260(2020).