AUTHOR=Lee Brady D. , Moser Erin L. , Brooks Shelby M. , Saunders Danielle L. , Howard M. Hope TITLE=Microbial Contribution to Iodine Speciation in Hanford's Central Plateau Groundwater: Iodide Oxidation JOURNAL=Frontiers in Environmental Science VOLUME=7 YEAR=2020 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2019.00145 DOI=10.3389/fenvs.2019.00145 ISSN=2296-665X ABSTRACT=
A waste product from plutonium production at Hanford, the radioisotope iodine-129 (129I), is an environmental concern due to its long half-life, mobility, and hazardous potential to humans through bioaccumulation in the thyroid gland. Consequently, understanding the biological mechanisms and contributors to iodine speciation is important in order to increase our knowledge of iodine mobility and the overall risk to human health and the environment, and to evaluate remediation strategies for contaminated areas, as current remediation methods are insufficient and unsustainable. Although iodide (I−) is thermodynamically favored in the geological support material based on existing pH and Eh ranges at the Hanford Site, the dominant species of iodine found in groundwater is iodate (