Fractionation of potentially toxic elements in urban soils from five European cities by means of a harmonised sequential extraction procedure

Christine M. Davidson, Graham J. Urquhart, Franco Ajmone-Marsan, Mattia Biasioli, Armando da Costa Duarte, Encarnación Díaz-Barrientos, Helena Grčman, Iain Hossack, Andrew S. Hursthouse, Luis Madrid, Sonia Rodrigues, Marko Zupan

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

The revised (four-step) BCR sequential extraction procedure has been applied to fractionate the chromium, copper, iron, manganese, nickel, lead and zinc contents in urban soil samples from public-access areas in five European cities. A preliminary inter-laboratory comparison was conducted and showed that data obtained by different laboratories participating in the study were sufficiently harmonious for comparisons to be made between cities and land types (e.g. parks, roadside, riverbanks, etc.). Analyte recoveries by sequential extraction, with respect to direct aqua regia digestion, were generally acceptable (100 ± 15%). Iron, nickel and, at most sites, chromium were found mainly in association with the residual phase of the soil matrix. Copper was present in the reducible, oxidisable and residual fractions, whilst zinc was found in all four sequential extracts. Manganese was strongly associated with reducible material as, in some cities, was lead. This is of concern because high lead concentrations were present in some soils (>500 mg kg−1) and the potential exists for remobilisation under reducing conditions. As would be expected, extractable metal contents were generally highest in older, more heavily industrialised cities. Copper, lead and zinc showed marked (and often correlated) variations in concentrations between sites within the same city whereas manganese and, especially, iron, did not. No overall relationships were, however, found between analyte concentrations and land use, nor between analyte partitioning and land use.
LanguageEnglish
Pages63-72
Number of pages9
JournalAnalytica Chimica Acta
Volume565
Issue number1
DOIs
Publication statusPublished - Feb 2006

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Poisons
Fractionation
Manganese
Zinc
Copper
Soil
Iron
fractionation
Chromium
Nickel
Soils
Land use
manganese
zinc
copper
Roadsides
soil
iron
chromium
nickel

Keywords

  • Potentially toxic elements
  • Potentially toxic metals
  • Urban soil
  • Sequential extraction
  • chemistry

Cite this

Davidson, Christine M. ; Urquhart, Graham J. ; Ajmone-Marsan, Franco ; Biasioli, Mattia ; da Costa Duarte, Armando ; Díaz-Barrientos, Encarnación ; Grčman, Helena ; Hossack, Iain ; Hursthouse, Andrew S. ; Madrid, Luis ; Rodrigues, Sonia ; Zupan, Marko. / Fractionation of potentially toxic elements in urban soils from five European cities by means of a harmonised sequential extraction procedure. In: Analytica Chimica Acta. 2006 ; Vol. 565, No. 1. pp. 63-72.
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Davidson, CM, Urquhart, GJ, Ajmone-Marsan, F, Biasioli, M, da Costa Duarte, A, Díaz-Barrientos, E, Grčman, H, Hossack, I, Hursthouse, AS, Madrid, L, Rodrigues, S & Zupan, M 2006, 'Fractionation of potentially toxic elements in urban soils from five European cities by means of a harmonised sequential extraction procedure' Analytica Chimica Acta, vol. 565, no. 1, pp. 63-72. https://doi.org/10.1016/j.aca.2006.02.014

Fractionation of potentially toxic elements in urban soils from five European cities by means of a harmonised sequential extraction procedure. / Davidson, Christine M.; Urquhart, Graham J.; Ajmone-Marsan, Franco; Biasioli, Mattia; da Costa Duarte, Armando; Díaz-Barrientos, Encarnación; Grčman, Helena; Hossack, Iain; Hursthouse, Andrew S.; Madrid, Luis; Rodrigues, Sonia; Zupan, Marko.

In: Analytica Chimica Acta, Vol. 565, No. 1, 02.2006, p. 63-72.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fractionation of potentially toxic elements in urban soils from five European cities by means of a harmonised sequential extraction procedure

AU - Davidson, Christine M.

AU - Urquhart, Graham J.

AU - Ajmone-Marsan, Franco

AU - Biasioli, Mattia

AU - da Costa Duarte, Armando

AU - Díaz-Barrientos, Encarnación

AU - Grčman, Helena

AU - Hossack, Iain

AU - Hursthouse, Andrew S.

AU - Madrid, Luis

AU - Rodrigues, Sonia

AU - Zupan, Marko

PY - 2006/2

Y1 - 2006/2

N2 - The revised (four-step) BCR sequential extraction procedure has been applied to fractionate the chromium, copper, iron, manganese, nickel, lead and zinc contents in urban soil samples from public-access areas in five European cities. A preliminary inter-laboratory comparison was conducted and showed that data obtained by different laboratories participating in the study were sufficiently harmonious for comparisons to be made between cities and land types (e.g. parks, roadside, riverbanks, etc.). Analyte recoveries by sequential extraction, with respect to direct aqua regia digestion, were generally acceptable (100 ± 15%). Iron, nickel and, at most sites, chromium were found mainly in association with the residual phase of the soil matrix. Copper was present in the reducible, oxidisable and residual fractions, whilst zinc was found in all four sequential extracts. Manganese was strongly associated with reducible material as, in some cities, was lead. This is of concern because high lead concentrations were present in some soils (>500 mg kg−1) and the potential exists for remobilisation under reducing conditions. As would be expected, extractable metal contents were generally highest in older, more heavily industrialised cities. Copper, lead and zinc showed marked (and often correlated) variations in concentrations between sites within the same city whereas manganese and, especially, iron, did not. No overall relationships were, however, found between analyte concentrations and land use, nor between analyte partitioning and land use.

AB - The revised (four-step) BCR sequential extraction procedure has been applied to fractionate the chromium, copper, iron, manganese, nickel, lead and zinc contents in urban soil samples from public-access areas in five European cities. A preliminary inter-laboratory comparison was conducted and showed that data obtained by different laboratories participating in the study were sufficiently harmonious for comparisons to be made between cities and land types (e.g. parks, roadside, riverbanks, etc.). Analyte recoveries by sequential extraction, with respect to direct aqua regia digestion, were generally acceptable (100 ± 15%). Iron, nickel and, at most sites, chromium were found mainly in association with the residual phase of the soil matrix. Copper was present in the reducible, oxidisable and residual fractions, whilst zinc was found in all four sequential extracts. Manganese was strongly associated with reducible material as, in some cities, was lead. This is of concern because high lead concentrations were present in some soils (>500 mg kg−1) and the potential exists for remobilisation under reducing conditions. As would be expected, extractable metal contents were generally highest in older, more heavily industrialised cities. Copper, lead and zinc showed marked (and often correlated) variations in concentrations between sites within the same city whereas manganese and, especially, iron, did not. No overall relationships were, however, found between analyte concentrations and land use, nor between analyte partitioning and land use.

KW - Potentially toxic elements

KW - Potentially toxic metals

KW - Urban soil

KW - Sequential extraction

KW - chemistry

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M3 - Article

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