Source of sediments and metal fractionation in two Chinese estuarine marshes

Xuyin Yuan, Ying Chen, Bing Li, Donald I. Siegel

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The Changjiang and the Jiulong Estuaries, located in eastern and southeastern China, respectively, have different geomorphologic and tidal processes as well as anthropogenic development in their associated watersheds. Sediments in the Changjiang estuary mostly consist of SiO2, CaO and MgO (mean percentages of 63.9, 4.34 and 2.35%), whereas sediments from the Jiulong estuary mostly consist of Al2O3, Fe2O3 and organic matter (mean percentages 19.2, 6.82 and 4.14%). The Jiulong estuarine sediments contain more than twice the concentrations of Pb, Zn, Cu, than those from the Changjiang estuary. In the Jiulong estuary, these heavy metals are associated with carbonates and organic matter, whereas in the Changjiang estuary, they are associated with residual fractions or clay. Sediments from the Changjiang estuary, mostly sediments with little organic matter, do not efficiently sequester anthropogenic-derived trace metals. In contrast, sediments from the Jiulong estuary consist of a mixture of fluvial and marine matter which can sequester heavy metals contributed by larger landscapes with industrial and municipal wastewater.

Original languageEnglish (US)
Pages (from-to)1535-1544
Number of pages10
JournalEnvironmental Earth Sciences
Volume60
Issue number7
DOIs
StatePublished - Jun 2010

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Keywords

  • Changjiang estuary
  • Jiulong estuary
  • Marsh
  • Metal fractionation
  • Sediment

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Geology
  • Global and Planetary Change
  • Pollution
  • Water Science and Technology
  • Environmental Chemistry
  • Soil Science

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