Accumulation discrepancy of heavy metal and organic pollutants in three near-shore depositional environments, southeastern China

Huan Xin Weng, Yang Ming Zhu, Ya Chao Qin, Jian Yu Chen, Xun Hong Chen

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Heavy metal and organic pollutants in sediments along the coastal zone of southeastern China have been investigated. Sediment samples are retrieved from three depositional environments: coast, estuary, and tide-affected river mouth. The relative abundance of heavy metal and organic pollutants is related to their geochemical properties as well as depositional environments and anthropogenic discharge. Based on a sequential extraction method, it is revealed that anthropogenic Pb, Cr, Cu, and Cd are mainly bound to Fe-Mn oxides, suggesting that adsorption and co-precipitation of Fe-Mn oxides are in the control of their transfer processes from water column to sediment. Heavy metal bound to carbonates is also an important pool especially for Cd, Mn, and Pb. The main organic pollutants found in the study area include petroleum-related alkanes, phthalic acid ester, organic silicon, chlorophenol, phenyl ether, and amine. The accumulation of heavy metals and organics in surficial sediments has a decrease tendency from estuarine environment to coastal environment and to tide-affected river mouth.

Original languageEnglish (US)
Pages (from-to)522-532
Number of pages11
JournalJournal of Asian Earth Sciences
Volume31
Issue number4-6
DOIs
StatePublished - Jan 10 2008

Keywords

  • Accumulation discrepancy
  • Depositional environment
  • Heavy metals
  • Organic pollutants
  • Southeastern China
  • Speciation extraction

ASJC Scopus subject areas

  • Geology
  • Earth-Surface Processes

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