Iodine-129 is a fission product and highly mobile in the environment. Along with other stable isotopes of iodine, 129I is released during reprocessing of nuclear fuel and must be trapped to prevent the release of radioactivity to the environment.
Past studies have provided evidence that iodine can become associated with natural organic matter (NOM). This research explores
the use of NOM (sphagnum peat and humic acid) to sequester iodine from the vapor and aqueous phases. NOM-associated iodine
may be stable for geological storage. NOM-sequestered iodine can be recovered by pyrolysis to prepare target materials for
transmutation. The nature of the NOM-iodine association has been explored.