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Possible role of organic matter in radiocaesium adsorption in soils

Staunton, S. and Dumat, Camille and Zsolnay, A. Possible role of organic matter in radiocaesium adsorption in soils. (2002) Journal of Environmental Radioactivity, vol. 58 (n°2-3). pp. 163-173. ISSN 0265-931X

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Official URL: http://dx.doi.org/10.1016/S0265-931X(01)00064-9

Abstract

The aim of this review is to examine the hypothesis that organic matter decreases the adsorption of radiocaesium on clay minerals. The factors that determine radiocaesium mobility and bioavailability in soil are briefly outlined to show why a relationship between soil organic matter content and enhanced Cs bioavailability is paradoxical. In all the investigations reviewed the ionic compositions of both the solid and the solution phases have been strictly controlled. We show that the addition of organic matter to reference clay minerals causes decreases of up to an order of magnitude in the distribution coefficient of radiocaesium. Similarly, the chemical removal of organic matter from the clay-sized fraction of soil usually leads to an increase in Cs adsorption. We suggest that the nature of the organic matter and its interaction with mineral surfaces are as important as the amount present.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S0265931X01000649
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Institut National de la Recherche Agronomique - INRA
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Other partners > Helmholtz Zentrum München (GERMANY)
Laboratory name:
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Deposited By: Nadia Kelmouss

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