Different routes of bismuth mineral transformation during pertechnetate and perrhenate uptake for subsurface remediation†

IF 3.5 4区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Environmental Science: Water Research & Technology Pub Date : 2024-10-03 DOI:10.1039/D4EW00496E

D. Boglaienko, M. E. Bowden, N. M. Escobedo, Q. M. Collins, A. R. Lawter, T. G. Levitskaia and C. I. Pearce

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Abstract

We investigated basic bismuth subnitrate for removal of radioactive technetium-99 as pertechnetate (⁹⁹TcO₄⁻) from contaminated groundwater. This material removed 93% of the initial concentration of ⁹⁹TcO₄⁻ within a week via formation of pH-dependent mineral phases that were identified here, but not reported previously. Perrhenate (ReO₄⁻) removal was also studied because it is a widely used non-radiological analogue for ⁹⁹TcO₄⁻, considering their similar physicochemical properties. 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 have different kinetics of contaminant removal as a result of variations in mineral transformation.

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过硫酸盐和过铼酸盐在地下修复过程中铋矿物转化的不同途径†。

我们研究了碱式次硝酸铋从受污染的地下水中去除放射性锝-99（全硫酸盐，99TcO4-）的方法。这种材料通过形成与 pH 值相关的矿物相，在一周内去除了 93% 的初始浓度的 99TcO4-。我们还研究了铼酸盐（ReO4-）的去除，因为考虑到它们相似的物理化学特性，铼酸盐是 99TcO4- 广泛使用的非放射性类似物。我们发现，去除 ReO4- 与去除 99TcO4- 并不完全相同，还会形成额外的过渡相。这表明，由于矿物转化的不同，过铼酸盐和过硫酸盐具有不同的污染物去除动力学。

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来源期刊

Environmental Science: Water Research & Technology ENGINEERING, ENVIRONMENTALENVIRONMENTAL SC-ENVIRONMENTAL SCIENCES

CiteScore

8.60

自引率

4.00%

发文量

206

期刊介绍： Environmental Science: Water Research & Technology seeks to showcase high quality research about fundamental science, innovative technologies, and management practices that promote sustainable water.

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Back cover Equity-centered adaptive sampling in sub-sewershed wastewater surveillance using census data. Different routes of bismuth mineral transformation during pertechnetate and perrhenate uptake for subsurface remediation† Environmental and private property contamination following the Norfolk Southern chemical spill and chemical fires in Ohio† Back cover