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      Comprehensive Investigation and Assessment of Nutrient and Heavy Metal Contamination in the Surface Water of Coastal Bohai Sea in China

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          With the rapid development of industrialization and urbanization of coastal regions, eutrophication and metal pollution have caused serious environmental problems in China. To better understand the potential environmental risks associated with nutrients and heavy metals, the surface water was comprehensively investigated in the coastal Bohai Sea. A total of 150 sites were sampled from seven coastal regions, and the concentrations of nutrients (DIN and DIP) and metals (Cd, Pb, Zn, Cu, Cr, As and Hg) in the surface seawater were measured. The results showed that the DIN concentration of about 50% sites exceeded the Grade-I of Seawater Quality Standard of China. Due to high concentrations of DIN, the status of eutrophication was serious in the Bohai Bay and Shuangtaizi Estuary. According to Seawater Quality Standard of China, Pb, Zn, Hg and Cu were the main metal pollutants in the coastal Bohai Sea. There was generally low ecological risk caused by heavy metals, but certain hotspots existed near Shuangtaizi Estuary and Changxingdao Island.

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          Author and article information

          Journal of Ocean University of China
          Science Press and Springer (China )
          10 July 2020
          01 August 2020
          : 19
          : 4
          : 843-852
          1College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
          2Marine Ecology Department, National Marine Environmental Monitoring Center, Dalian 116023, China
          3School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
          4Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
          Author notes
          *Corresponding author: LI Hongjun, E-mail: hjli@
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2020.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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