State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Mar Pollut Bull. 2014 Nov 15;88(1-2):347-53. doi: 10.1016/j.marpolbul.2014.08.028. Epub 2014 Sep 12.
A total of 220 surface sediments and eight sediment cores were analyzed to study the distribution and transport of Hg in Chinese marginal seas. Spatial distribution showed a general offshore decreasing trend towards the outer continental shelf. Vertical profiles of sediment cores displayed a general increasing trend from bottom to surface layers. Coastal land-based discharges and river-derived inputs are probably the main sources of Hg in coastal sediments of China seas, while TOC, pH, ocean currents and sediment characteristics could play important roles in the transport and spatial distribution of Hg in sediment. The influence of TOC on Hg concentration is more significant than that of pH. The mud deposits on the coastal shelves are main sinks of Hg in the region. The results showed that sedimentary Hg was affected by regional anthropogenic activities and riverine runoffs, and was also influenced by long-range atmospheric transport and ocean current circulations.
共分析了 220 个表层沉积物和 8 个沉积物岩芯，以研究汞在中国边缘海的分布和输运。空间分布显示，从近海向外大陆架呈总体递减趋势。沉积物岩芯的垂直剖面显示，从底层到表层呈总体增加趋势。沿海陆源排放和河流输入可能是中国海域近岸沉积物中汞的主要来源，而 TOC、pH 值、海流和沉积物特征可能在汞在沉积物中的输运和空间分布中起重要作用。TOC 对汞浓度的影响比 pH 值更为显著。沿海陆架上的泥质沉积物是该区域汞的主要汇。结果表明，沉积态汞受区域人为活动和河流径流的影响，也受长距离大气传输和海流环流的影响。
