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Pascal E. Reiller, Florence Mercier-Bion, Nicolas Gimenez, N. Barré, F. Miserque

Iodination of humic acid samples from different origins

Keywords: Iodine, Humic acid, Iodination, Kinetics, Aromaticity

The iodination of Gorleben and synthetic humic substances (HS) was studied complementarily by UV-visible and X-ray Photoelectron Spectroscopy (XPS). The I₂(aq) consumption kinetics could neither be linearly correlated to [H⁺] nor to HS concentration as already observed in the literature. Nevertheless, the electrophilic substitution mechanism was further evidenced by the production of both I₃^- and I^-, leading to a covalent bonding. The XPS analysis of the iodinated samples confirmed the covalent bonding between iodine and carbon of HS for all the samples.

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 94, 09/2006
Pages: 739 - 745

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