Cristin-resultat-ID: 352817
Sist endret: 28. september 2013, 16:20
NVI-rapporteringsår: 2011
Resultat
Vitenskapelig artikkel
2011

Potentially harmful elements in rice paddy fields in mercury hot spots in Guizhou, China

Bidragsytere:
  • Marthe-Lise Søvik
  • Thorjørn Larssen
  • Rolf David Vogt
  • Grethe Wibetoe og
  • Xinbin Feng

Tidsskrift

Applied Geochemistry
ISSN 0883-2927
e-ISSN 1872-9134
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2011
Volum: 26
Hefte: 2
Sider: 167 - 173

Importkilder

Isi-ID: 000287288100004

Beskrivelse Beskrivelse

Tittel

Potentially harmful elements in rice paddy fields in mercury hot spots in Guizhou, China

Sammendrag

Levels of the chalcophile metals Hg, Pb, Cd, Cu and Zn and the metalloid As in soils from rice paddy fields were assessed in two regions impacted by different industrial activities in Guizhou province, China. The two study areas (Wanshan and Qingzhen) have previously received attention in the international literature due to heavy Hg pollution, though levels of other potentially harmful elements have not previously been reported. The regions were selected as representing two important, but categorically different metal(loid) contaminated areas in China: Wanshan has been a major region for Hg production while Qingzhen is an important region for a large range of various heavy industries based on coal as an energy source. Within a limited distance of the Hg mine tailings in Wanshan the rice paddy fields are heavily contaminated by Hg (median concentration 25 μg g−1, maximum 119 μg g−1) and moderately contaminated by Zn and Cd (median concentrations of 86 and 0.9 μg g−1, respectively). Zinc and Cd levels correlate well with Hg contamination, which indicates a similar source and mechanism of transport and accumulation. Other studies have concluded that the main sources of Hg contamination in Wanshan are the numerous Hg mine tailings. This is likely as these metals are all geochemically associated with the mineral cinnabar (HgS). The other chalcophile elements (Pb, Cu and As) are nevertheless found at background levels only. In Qingzhen the soils were found to contain elevated levels of As and Hg (median concentrations of 38 and 0.3 μg g−1, respectively). These are elements that are known to be more associated with coal and released during coal combustion.

Bidragsytere

Marthe-Lise Søvik

  • Tilknyttet:
    Forfatter
    ved Akvatiske miljøgifter ved Norsk institutt for vannforskning

Thorjørn Larssen

  • Tilknyttet:
    Forfatter
    ved Kjemisk institutt ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Akvatiske miljøgifter ved Norsk institutt for vannforskning
Aktiv cristin-person

Rolf David Vogt

  • Tilknyttet:
    Forfatter
    ved Kjemisk institutt ved Universitetet i Oslo

Grethe Wibetoe

  • Tilknyttet:
    Forfatter
    ved Kjemisk institutt ved Universitetet i Oslo

Xinbin Feng

  • Tilknyttet:
    Forfatter
    ved Chinese Academy of Sciences
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