Simultaneous immobilization of aqueous co-contaminants using a bismuth layered material

xlomafota13 shared this article with you from Inoreader Simultaneous immobilization of aqueous co-contaminants using a bismuth layered material Via radioactive iodine J Environ Radioact. 2021 Oct;237:106711. doi: 10.1016/j.jenvrad.2021.106711. Epub 2021 Aug 10. ABSTRACT The remediation of co-located contaminants in the vadose zone can be challenging due to accessibility and responses of different contaminants to remedial actions. At the Hanford Site (WA, USA), multiple radionuclides and other hazardous contaminants are present in the vadose zone and groundwater, including iodine-129 (I), technetium-99 (Tc), uranium-238 (U), chromium (Cr), and ni trate (NO3-). We evaluated a layered Bi oxyhydroxide material for its potential to remove individual and co-located contaminants with a series of batch experiments that investigated a range of plume conditions, followed by solid phase characterization of the reacted bismuth material. The results demonstrated successful removal of four contaminants (>98% removal of I, Tc, U, and Cr from the aqueous phase after 30 days) when tested individually. When contaminants were combined, a slight decrease in Tc removal occurred (-6%p). The addition of sediment decreased the removal for Tc and I, but U and Cr removal was unaffected. The results of these batch tests demonstrated that the bismuth based oxy-hydroxide material is a promising material for sequestering multiple contaminants in situ. PMID:34388522 | DOI:10.1016/j.jenvrad.2021.106711 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.