AustralieFrV1, Main, Exploration, bibRecord, 008B17

Potential phytoavailability of anthropogenic cobalt in soils as measured by isotope dilution techniques

Identifieur interne : 008B17 ( Main/Exploration ); précédent : 008B16; suivant : 008B18

Potential phytoavailability of anthropogenic cobalt in soils as measured by isotope dilution techniques

Auteurs : Estelle Bakkaus [France] ; Richard N. Collins [Australie] ; Jean-Louis Morel [France] ; Barbara Gouget [France]

Source :

Science of the total environment [ 0048-9697 ] ; 2008.

RBID : Pascal:09-0021630

Descripteurs français

Pascal (Inist)
- Pollution sol, Cobalt, Facteur anthropique, Devenir polluant, Biodisponibilité, Méthode mesure, Dilution isotopique, Coefficient partage, Echange isotopique, Facteur milieu, Caractéristique sol, Belgique, Finlande, Pennsylvanie.
Wicri :
- geographic : Belgique, Finlande.
- topic : Cobalt.

English descriptors

KwdEn :
- Anthropogenic factor, Belgium, Bioavailability, Cobalt, Environmental factor, Finland, Isotope dilution, Isotope exchange, Measurement method, Partition coefficient, Pennsylvania, Pollutant behavior, Property of soil, Soil pollution.

Abstract

Isotope dilution is a useful technique to determine the potential phytoavailability of an element in soil. This method involves equilibrating an isotope with soil and then sampling the labile metal pool by analysis of the soil solution (E value) or plants growing in the soil (L value). The work reported here was conducted to evaluate the distribution coefficient (K_d), and the potential phytoavailability (E value) of cobalt (Co) in eight soils subjected to the atmospheric deposition of anthropogenic Co. Multiple regression analyses demonstrated that the K_d of isotopically exchangeable Co in these soils was best modelled with two parameters: soil pH and organic carbon (OC) content (log Kd=0.85(pH)+1.1(logOC)-5.0, R²=0.94, p<0.01). Cobalt E values ranged from 1.5 to 37% of total soil Co concentrations. No evidence was obtained to suggest that Co(III), if present, was isotopically exchangeable in these soils and it was concluded that the Co E values consisted solely of Co(II). Cobalt L values, measured with Triticum aestiuum L. (46 days), of two of these soils (varying in soil pH, e.g. 5.0 and 7.2) were statistically (p<0.05) different to E values. However, when changes of bulk soil pH on Co E values were considered, the two values were statistically (p<0.05) similar indicating that processes affecting soil pH during plant growth can alter isotopically exchangeable concentrations of Co.

Affiliations:

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Le document en format XML

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<term>Environmental factor</term>
<term>Finland</term>
<term>Isotope dilution</term>
<term>Isotope exchange</term>
<term>Measurement method</term>
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<term>Echange isotopique</term>
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<front><div type="abstract" xml:lang="en">Isotope dilution is a useful technique to determine the potential phytoavailability of an element in soil. This method involves equilibrating an isotope with soil and then sampling the labile metal pool by analysis of the soil solution (E value) or plants growing in the soil (L value). The work reported here was conducted to evaluate the distribution coefficient (K<sub>d</sub>
), and the potential phytoavailability (E value) of cobalt (Co) in eight soils subjected to the atmospheric deposition of anthropogenic Co. Multiple regression analyses demonstrated that the K<sub>d</sub>
 of isotopically exchangeable Co in these soils was best modelled with two parameters: soil pH and organic carbon (OC) content (log Kd=0.85(pH)+1.1(logOC)-5.0, R<sup>2</sup>
=0.94, p<0.01). Cobalt E values ranged from 1.5 to 37% of total soil Co concentrations. No evidence was obtained to suggest that Co(III), if present, was isotopically exchangeable in these soils and it was concluded that the Co E values consisted solely of Co(II). Cobalt L values, measured with Triticum aestiuum L. (46 days), of two of these soils (varying in soil pH, e.g. 5.0 and 7.2) were statistically (p<0.05) different to E values. However, when changes of bulk soil pH on Co E values were considered, the two values were statistically (p<0.05) similar indicating that processes affecting soil pH during plant growth can alter isotopically exchangeable concentrations of Co.</div>
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Potential phytoavailability of anthropogenic cobalt in soils as measured by isotope dilution techniques

Potential phytoavailability of anthropogenic cobalt in soils as measured by isotope dilution techniques

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri