Contamination, toxicity and speciation of heavy metals in an industrialized urban river : Implications for the dispersal of heavy metals

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Qihang Wu
  • Haichao Zhou
  • Nora F.Y. Tam
  • Yu Tian
  • Yang Tan
  • And 4 others
  • Song Zhou
  • Qing Li
  • Yongheng Chen
  • Jonathan Y.S. Leung

Detail(s)

Original languageEnglish
Pages (from-to)153-161
Journal / PublicationMarine Pollution Bulletin
Volume104
Issue number1-2
Online published5 Feb 2016
Publication statusPublished - 15 Mar 2016

Abstract

Urban rivers are often utilized by the local residents as water source, but they can be polluted by heavy metals due to industrialization. Here, the concentrations, toxicity, speciation and vertical profiles of heavy metals in sediment were examined to evaluate their impact, dispersal and temporal variation in Dongbao River. Results showed that the sediment in the industrialized areas was seriously contaminated with Cr, Cu and Ni which posed acute toxicity. Heavy metals, except Cr and Pb, were mainly associated with non-residual fractions, indicating their high mobility and bioavailability. The non-industrialized areas were also seriously contaminated, suggesting the dispersal of heavy metals along the river. The surface sediment could be more contaminated than the deep sediment, indicating the recent pollution events. Overall, when the point sources are not properly regulated, intense industrialization can cause both serious contamination and dispersal of heavy metals, which have far-reaching consequences in public health and environment.

Research Area(s)

  • Contamination, Dispersal, Heavy metal, Speciation, Toxicity, Urban river

Citation Format(s)

Contamination, toxicity and speciation of heavy metals in an industrialized urban river : Implications for the dispersal of heavy metals. / Wu, Qihang; Zhou, Haichao; Tam, Nora F.Y.; Tian, Yu; Tan, Yang; Zhou, Song; Li, Qing; Chen, Yongheng; Leung, Jonathan Y.S.

In: Marine Pollution Bulletin, Vol. 104, No. 1-2, 15.03.2016, p. 153-161.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review