title: Mercury profiles in sediments of the Pearl River Estuary and the surrounding coastal area of South China.
abstract: 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.
authors.affiliation: 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.
authors.forename: Jian-bo
authors.initials: JB
authors.lastname: Shi
authors.forename: Carman C M
authors.initials: CC
authors.lastname: Ip
authors.forename: Gan
authors.initials: G
authors.lastname: Zhang
authors.forename: Gui-bin
authors.initials: GB
authors.lastname: Jiang
authors.forename: Xiang-dong
authors.initials: XD
authors.lastname: Li
mesh_terms: D002681:China; D004784:Environmental Monitoring; D005618:Fresh Water / Q000032:analysis; D019015:Geologic Sediments / Q000032:analysis*; D008628:Mercury / Q000032:analysis*; D012623:Seawater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D008628:Mercury