State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
Environ Pollut. 2010 May;158(5):1974-9. doi: 10.1016/j.envpol.2010.01.033. Epub 2010 Feb 26.
The spatial and temporal variations of mercury (Hg) in sediments of the Pearl River Estuary (PRE) and the surrounding coastal area (South China Sea) were studied. In surface sediments, the concentrations of Hg ranged from 1.5 to 201ng/g, with an average of 54.4ng/g, displaying a decreasing trend with the distance from the estuary to the open sea. This pattern indicates that the anthropogenic emissions from the Pearl River Delta (PRD) region are probably the main sources of Hg in this coastal region. Using the (210)Pb dating technique, the historical changes in the concentrations and influxes of Hg in the last 100 years were also investigated. The variations in Hg influxes in sediment cores obviously correlate with the economic development and urbanization that has occurred the PRD region, especially in the last three decades.
研究了珠江口（PRE）及其周边沿海地区（南海）沉积物中汞（Hg）的时空变化。在表层沉积物中，Hg 的浓度范围为 1.5 至 201ng/g，平均值为 54.4ng/g，呈现出从河口向远海逐渐降低的趋势。这一模式表明，珠江三角洲（PRD）地区的人为排放可能是该沿海地区 Hg 的主要来源。此外，还利用（210）Pb 测年技术研究了过去 100 年来 Hg 浓度和通量的历史变化。沉积物芯中 Hg 通量的变化与 PRD 地区的经济发展和城市化明显相关，尤其是在过去三十年。
