College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; Zhejiang Marine Ecology and Environment Monitoring Center, Zhoushan 316021, China; Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; National Marine Hazard Mitigation Service, Ministry of Natural Resources, Beijing 100194, China.
Mar Pollut Bull. 2022 Sep;182:113975. doi: 10.1016/j.marpolbul.2022.113975. Epub 2022 Aug 5.
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.
海洋中溶解态重金属污染正成为一个环境关注点。它们的分布模式复杂，受沿海海洋中多种因素的影响。因此，需要更多的调查来了解它们在海水中的行为。本研究系统调查了 2019 年春季、夏季和秋季长江口东海表层和底层水中 Cu、Pb、Cd、As、Zn 和海水性质的分布。结果表明存在显著的时空分布，可以划分出河口、近岸和近海三个区域模式。虽然来源、水动力、生物吸收和沉积物再悬浮影响了整体分布，但溶解氧和 pH 值分别主要影响河口和近海，近岸的影响因素更为复杂。研究期间评估的生态风险较低，但全球变暖、海洋酸化和缺氧是了解海洋中溶解态重金属生物地球化学的重要关注点。
