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Title: Trace metal distribution in sediments of the Pearl River Estuary and the surrounding coastal area, South China
Authors: Ip, Ching-man
Li, Xiangdong
Zhang, Gan
Wai, Wing-hong Onyx
Li, Yok-sheung
Subjects: Sediment
Heavy metals
Pb isotopes
Pearl River Estuary (PRE)
South China Sea
Issue Date: May-2007
Publisher: Elsevier
Source: Environmental pollution, May 2007, v. 147, no. 2, p. 311-323.
Abstract: Surface sediments and sediment cores collected at the Pearl River Estuary (PRE) and its surrounding coastal area were analysed for total metal concentrations, chemical partitioning, and Pb isotopic compositions. The distribution of Cu, Cr, Pb, and Zn demonstrated a typical diffusion pattern from the land to the direction of the sea. Two hotspots of trace metal contamination were located at the mixed zone between freshwater and marine waters. The enrichment of metals in the sediments could be attributed to the deposition of the dissolved and particulate trace metals in the water column at the estuarine area. The similar Pb isotopic signatures of the sediments at the PRE and its surrounding coastal area offered strong evidence that the PRE was a major source of trace metals to the adjacent coastal area. Slightly lower [sup 206]Pb/[sup 207]Pb ratios in the coastal sediments may indicate other inputs of Pb in addition to the PRE sources, including the inputs from Hong Kong and other parts of the region.
Rights: Environmental Pollution © 2006 Elsevier. The journal web site is located at
Type: Journal/Magazine Article
DOI: 10.1016/j.envpol.2006.06.028
ISSN: 0269-7491
Appears in Collections:CEE Journal/Magazine Articles

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