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Iodination of humic acid samples from different origins

Abstract : 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 a 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.
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Pascal E. Reiller, F. Mercier-Bion, N. Gimenez, N. Barré, F. Miserque. Iodination of humic acid samples from different origins. Radiochimica Acta, R Oldenbourg Verlag GMBH, 2006, 94 (9-11), pp.739-745. ⟨10.1524/ract.2006.94.9-11.739⟩. ⟨cea-00288427⟩

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