Environ. Sci. Technol. 2009, 43, 7003–7009
Formation of Iodinated Organic Compounds by Oxidation of Iodide-Containing Waters with Manganese Dioxide ´ G A L L A R D , * ,† S E ´ BASTIEN ALLARD,† HERVE RUDY NICOLAU,† URS VON GUNTEN,‡ ´† AND JEAN PHILIPPE CROUE Laboratoire de Chimie et Microbiologie de l’Eau UMR CNRS 6008, ESIP - Universite´ de Poitiers, 40 avenue du Recteur Pineau 86 022 POITIERS Cedex, France, and Eawag, Swiss Federal Institute of Aquatic Science and Technology Ueberlandstrasse, 133 CH 8600 Duebendorf, Switzerland
Received April 8, 2009. Revised manuscript received July 14, 2009. Accepted July 24, 2009.
This study shows that iodinated organic compounds can be produced when iodide-containing waters are in contact with manganese oxide birnessite (δ-MnO2) in the pH range of 5-7. In the absence of natural organic matter (NOM), iodide is oxidized to iodate that is also adsorbed onto δ-MnO2. In the presence of iodide and NOM, adsordable organic iodine compounds (AOI) are formed at pH
