Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30813
Title: The changes in trace metal contamination over the last decade in surface sediments of the Pearl River Estuary, South China
Authors: Chen, B
Liang, X
Xu, W
Huang, X
Li, X 
Keywords: China
Pearl River Estuary
Sedimentation
Spatial distribution
Statistical analysis
Trace metals
Issue Date: 2012
Publisher: Elsevier
Source: Science of the total environment, 2012, v. 439, p. 141-149 How to cite?
Journal: Science of the total environment 
Abstract: Surface sediments can provide useful information on the recent pollution status of an estuary. One recent field survey was carried out in the Pearl River Estuary (PRE), South China in 2011. The comparisons with previous surveys demonstrated that the concentrations of Ni and Pb in the PRE declined over the last decade, but the concentration of Cu increased in the same time frame. The significant decreases in the concentrations of Ni and Pb were probably due to a reduction of anthropogenic inputs, such as industrial wastewater, into the PRE environment, and the ban imposed on leaded gasoline. Statistical analyses have consistently demonstrated that the process of the sedimentation of fine particles was the dominant factor in controlling the transport and distribution of trace metals in the PRE. The riverine trace metals generally displayed a pattern of diffusion from the northwest to the southeast in the estuary. However, the riparian industrial activities at the east bank of the inner PRE caused significant metal contamination in sediments. In general, effective pollution control measures in the PRD region have decreased the levels of some trace metals in the entire PRE over the last decade with the exception of Cu.
URI: http://hdl.handle.net/10397/30813
ISSN: 0048-9697
EISSN: 1879-1026
DOI: 10.1016/j.scitotenv.2012.09.025
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