Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 279, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2020.111771
Keywords
Heavy metal; Yellow sea; Multi-media; Partition; Bioaccumulation
Categories
Funding
- National Key R&D Program of China [2018YFC1407600]
- Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation [201502]
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This study found that heavy metals in the marine ecosystem of the eastern sea area of Shandong Peninsula in China mainly come from terrestrial sources, with higher concentrations in sediments and seawater. Concentrations of heavy metals in mollusc were generally higher and poses potential risks.
To obtain a systematic knowledge on occurrence, partition, and risk of seven heavy metals (Cu, Pb, Zn, Cd, Cr, Hg, and As) in multi-media of marine ecosystem, sediments, seawater, and 20 species of organisms were collected from 62 sites in the eastern sea area of Shandong Peninsula, located in Yellow Sea (China), in four seasons of 2016. The concentrations were in the low-middle level compared with values from other sea areas all over the world. The highest concentrations of most of the seven elements were detected in sediments and seawater near the coastline. LogKd (distribution coefficient of sediment/water) ranged from 3.3 to 4.7. Concentrations of heavy metals in mollusc and/or crustacea were generally higher than that in fish (especially pelagic species), and while there was no significant relationships between pollutant concentrations and trophic levels. Cd and As were the most bio-accumulative elements, and As in mollusc may pose low non-carcinogenic risk We suggest that in the studied area heavy metals are mainly sourced from terrestrial input, preferentially retained by sediments, then accumulated in mollusc, and finally entered human body through mollusc consumption. Our study sounds an alarm for stricter control of metal emissions into this sea area.
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