Estimating the extractability of potentially toxic metals in urban soils: A comparison of several extracting solutions

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Abstract

Metals released by the extraction with aqua regia, EDTA, dilute HCl and sequential extraction (SE) by the BCR protocol were studied in urban soils of Sevilla, Torino, and Glasgow. By multivariate analysis, the amounts of Cu, Pb and Zn liberated by any method were statistically associated with one another, whereas other metals were not. The mean amounts of all metals extracted by HCl and by SE were well correlated, but SE was clearly underestimated by HCl. Individual data for Cu, Pb and Zn by both methods were correlated only if each city was considered separately. Other metals gave poorer relationships. Similar conclusions were reached comparing EDTA and HCl, with much lower values for EDTA. Dilute HCl extraction cannot thus be recommended for general use as alternative to BCR SE in urban soils.
LanguageEnglish
Pages713-722
Number of pages10
JournalEnvironmental Pollution
DOIs
Publication statusPublished - 2007

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Poisons
Soil
Metals
Edetic Acid
Soils
Ethylenediaminetetraacetic acid
Multivariate Analysis

Keywords

  • urban soils
  • extractability
  • toxic metals

Cite this

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title = "Estimating the extractability of potentially toxic metals in urban soils: A comparison of several extracting solutions",
abstract = "Metals released by the extraction with aqua regia, EDTA, dilute HCl and sequential extraction (SE) by the BCR protocol were studied in urban soils of Sevilla, Torino, and Glasgow. By multivariate analysis, the amounts of Cu, Pb and Zn liberated by any method were statistically associated with one another, whereas other metals were not. The mean amounts of all metals extracted by HCl and by SE were well correlated, but SE was clearly underestimated by HCl. Individual data for Cu, Pb and Zn by both methods were correlated only if each city was considered separately. Other metals gave poorer relationships. Similar conclusions were reached comparing EDTA and HCl, with much lower values for EDTA. Dilute HCl extraction cannot thus be recommended for general use as alternative to BCR SE in urban soils.",
keywords = "urban soils, extractability , toxic metals",
author = "Christine Davidson",
year = "2007",
doi = "10.1016/j.envpol.2006.09.005",
language = "English",
pages = "713--722",
journal = "Environmental Pollution",
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T1 - Estimating the extractability of potentially toxic metals in urban soils: A comparison of several extracting solutions

AU - Davidson, Christine

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Y1 - 2007

N2 - Metals released by the extraction with aqua regia, EDTA, dilute HCl and sequential extraction (SE) by the BCR protocol were studied in urban soils of Sevilla, Torino, and Glasgow. By multivariate analysis, the amounts of Cu, Pb and Zn liberated by any method were statistically associated with one another, whereas other metals were not. The mean amounts of all metals extracted by HCl and by SE were well correlated, but SE was clearly underestimated by HCl. Individual data for Cu, Pb and Zn by both methods were correlated only if each city was considered separately. Other metals gave poorer relationships. Similar conclusions were reached comparing EDTA and HCl, with much lower values for EDTA. Dilute HCl extraction cannot thus be recommended for general use as alternative to BCR SE in urban soils.

AB - Metals released by the extraction with aqua regia, EDTA, dilute HCl and sequential extraction (SE) by the BCR protocol were studied in urban soils of Sevilla, Torino, and Glasgow. By multivariate analysis, the amounts of Cu, Pb and Zn liberated by any method were statistically associated with one another, whereas other metals were not. The mean amounts of all metals extracted by HCl and by SE were well correlated, but SE was clearly underestimated by HCl. Individual data for Cu, Pb and Zn by both methods were correlated only if each city was considered separately. Other metals gave poorer relationships. Similar conclusions were reached comparing EDTA and HCl, with much lower values for EDTA. Dilute HCl extraction cannot thus be recommended for general use as alternative to BCR SE in urban soils.

KW - urban soils

KW - extractability

KW - toxic metals

U2 - 10.1016/j.envpol.2006.09.005

DO - 10.1016/j.envpol.2006.09.005

M3 - Article

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EP - 722

JO - Environmental Pollution

T2 - Environmental Pollution

JF - Environmental Pollution

SN - 0269-7491

ER -