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Influence of organic matter in the prediction of iodine migration in natural environment

Published online by Cambridge University Press:  11 February 2011

Pascal Reiller  and
Valérie Moulin
Pascal Reiller
Affiliation:
DPC/SECR/LSRM, Bâtiment 391, pièce 40, F-91191 Gif-sur-Yvette Cedex, France
Valérie Moulin
Affiliation:
CEA, CE Saclay, Nuclear Energy Division.
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Abstract

Halogenation of phenolic moieties is one of the most important reactions between humic substances (HS) and iodine or chlorine. These reactions were studied in order to assess the importance of these interactions with reduced (I−) and oxidised (I2) form of iodine. I− was fixed by the addition of Na2S2O3. After separation of HS and I− by ultrafiltration, no significant uptake was evidenced in the time framework of this study. The consumption of I2(aq) by HS was followed by the decay of I−3 absorbance (351 nm). It comes out that (i) when I− is fixed by Na2S2O3, no interaction with HS could be quantified; (ii) I2(aq) does react with HS but the kinetics cannot be linearalised. This study confirms the significance of iodine-organic matter interactions as a governing process for iodine migration in surface environment. More studies are on going to develop predictive models of iodination kinetics.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 757: Symposium II – Scientific Basis for Nuclear Waste Management XXVI , 2002 , II3.37
Copyright
Copyright © Materials Research Society 2003

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