Sorption, degradation, and transport of methyl iodide and other iodine species in geologic media

► Both inorganic and organic iodine species studied in twelve geologic samples. ► Batch and column approaches used to study sorption, degradation, and transport. ► MeI is weakly sorbed, but degradation varied greatly in media with different OM. ► Iodate sorbed more strongly than iodide, sorption of 4-iodoaniline related to OM.