The changes in trace metal contamination over the last decade in surface sediments of the Pearl River Estuary, South China

Baowei Chen, Ximei Liang, Weihai Xu, Xiaoping Huang, Xiangdong Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

66 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)141-149
Number of pages9
JournalScience of the Total Environment
Volume439
DOIs
Publication statusPublished - 15 Nov 2012

Keywords

  • China
  • Pearl River Estuary
  • Sedimentation
  • Spatial distribution
  • Statistical analysis
  • Trace metals

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Waste Management and Disposal
  • Environmental Engineering

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