Extractability and mobility of mercury from agricultural soils surrounding industrial and mining contaminated areas

Ana Teresa Reis, Sónia Morais Rodrigues, Christine M. Davidson, Eduarda Pereira, Armando C. Duarte

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

This study focussed on a comparison of the extractability of mercury in soils with two different contamination sources (a chlor-alkali plant and mining activities) and on the evaluation of the influence of specific soil properties on the behaviour of the contaminant. The method applied here did not target the identification of individual species, but instead provided information concerning the mobility of mercury species in soil. Mercury fractions were classified as mobile, semi-mobile and non-mobile. The fractionation study revealed that in all samples mercury was mainly present in the semi-mobile phase (between 63 and 97%). The highest mercury mobility (2.7 mg kg-1) was found in soils from the industrial area. Mining soils exhibited higher percentage of non-mobile mercury, up to 35%, due to their elevated sulfur content. Results of factor analysis indicate that the presence of mercury in the mobile phase could be related to manganese and aluminum soil contents. A positive relation between mercury in the semi-mobile fraction and the aluminium content was also observed. By contrary, organic matter and sulfur contents contributed to mercury retention in the soil matrix reducing the mobility of the metal. Despite known limitations of sequential extraction procedures, the methodology applied in this study for the fractionation of mercury in contaminated soil samples provided relevant information on mercury's relative mobility.
LanguageEnglish
Pages1369-1377
Number of pages9
JournalChemosphere
Volume81
Issue number11
DOIs
Publication statusPublished - Dec 2010

Fingerprint

Mercury
agricultural soil
Soils
soil
Fractionation
Aluminum
Sulfur
contaminated area
mercury
fractionation
sulfur
Alkalies
Factor analysis
Manganese
factor analysis
Biological materials
manganese
soil property
Contamination
aluminum

Keywords

  • mercury
  • mobility
  • sequential extraction
  • soils

Cite this

Reis, Ana Teresa ; Rodrigues, Sónia Morais ; Davidson, Christine M. ; Pereira, Eduarda ; Duarte, Armando C. / Extractability and mobility of mercury from agricultural soils surrounding industrial and mining contaminated areas. In: Chemosphere. 2010 ; Vol. 81, No. 11. pp. 1369-1377.
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Extractability and mobility of mercury from agricultural soils surrounding industrial and mining contaminated areas. / Reis, Ana Teresa; Rodrigues, Sónia Morais; Davidson, Christine M.; Pereira, Eduarda; Duarte, Armando C.

In: Chemosphere, Vol. 81, No. 11, 12.2010, p. 1369-1377.

Research output: Contribution to journalArticle

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