Journal
MARINE POLLUTION BULLETIN
Volume 182, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2022.113975
Keywords
East China Sea; Dissolved heavy metals; Spatiotemporal patterns; Sources; Hydrodynamics; Biological effect; Resuspension
Funding
- Southern Marine Science and En-gineering Guangdong Laboratory (Guangzhou) [GML2019ZD0210, K19313901]
- Open Research Subject of Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control [2021Y04]
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The distribution patterns of dissolved heavy metal pollution in the ocean are complex and influenced by multiple factors. This study investigated the distribution of Cu, Pb, Cd, As, Zn and seawater properties in the Yangtze River Estuary, East China Sea. The results showed significant spatiotemporal distribution and identified three zones - estuary, nearshore, and offshore. Different factors influenced the overall distribution, with dissolved oxygen and pH dominantly affecting the estuary and offshore, respectively.
Dissolved heavy metal pollution in the ocean is becoming an environmental concern. Their distribution patterns are complex and influenced by multiple factors in the coastal ocean. Therefore, more investigations are needed to understand their behavior in the seawater. This study systematically investigated the distribution of Cu, Pb, Cd, As, Zn and seawater properties in the surface and bottom water off the Yangtze River Estuary, East China Sea in spring, summer and autumn, 2019. The results showed significant spatiotemporal distribution that three-zone -pattern of estuary, nearshore, and offshore can be divided. While sources, hydrodynamics, biological uptake and sediment resuspension affected the overall distribution, dissolved oxygen and pH dominantly influenced the estuary and offshore respectively, with more complex factors in the nearshore. Low ecological risks were assessed during the study, but global warming, ocean acidification and hypoxia are essential concerns to understand the biogeochemistry of dissolved heavy metals in the ocean.
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