February 14, 2025
Journal Article
Different Routes of Bismuth Mineral Transformation during Pertechnetate and Perrhenate Uptake for Subsurface Remediation
Abstract
We investigated basic bismuth subnitrate for removal of radioactive technetium-99 as pertechnetate (99TcO4-) from contaminated groundwater. Perrhenate (ReO4-) removal was also studied because it is a widely used non-radiological analogue for 99TcO4-, considering their similar physicochemical properties. Contrary to common understanding, we found that removal of ReO4- was not identical to removal of 99TcO4- and led to formation of an additional transitional phase. This demonstrates that perrhenate and pertechnetate may not behave as expected, resulting in different kinetics of contaminant removal as a result of variations in mineral transformation.Published: February 14, 2025