Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Li, Runjie1,2; Zhang, Limin3; Chen, Yu1; Xia, Qingyin1; Liu, Dong4 ; Huang, Ying3; Dong, Hailiang1
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| Oxidation of Biogenic U(IV) in the Presence of Bioreduced Clay Minerals and Organic Ligands | |
| Source Publication | ENVIRONMENTAL SCIENCE & TECHNOLOGY
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| ISSN | 0013-936X |
| 2024-01-10 | |
| Volume | 58Issue:3Pages:1541-1550 |
| DOI | 10.1021/acs.est.3c07385 |
| Language | 英语 |
| WOS Research Area | Engineering ; Environmental Sciences & Ecology |
| Abstract | Bioreduction of soluble U-(VI) to sparingly soluble U-(IV) is proposed as an effective approach to remediating uranium contamination. However, the stability of biogenic U-(IV) in natural environments remains unclear. We conducted U-(IV) reoxidation experiments following U-(VI) bioreduction in the presence of ubiquitous clay minerals and organic ligands. Bioreduced Fe-rich nontronite (rNAu-2) and Fe-poor montmorillonite (rSWy-2) enhanced U-(IV) oxidation through shuttling electrons between oxygen and U-(IV). Ethylenediaminetetraacetic acid (EDTA), citrate, and siderophore desferrioxamine B (DFOB) promoted U-(IV) oxidation via complexation with U-(IV). In the presence of both rNAu-2 and EDTA, the rate of U-(IV) oxidation was between those in the presence of rNAu-2 and EDTA, due to a clay/ligand-induced change of U-(IV) speciation. However, the rate of U-(IV) oxidation in other combinations of reduced clay and ligands was higher than their individual ones because both promoted U-(IV) oxidation. Unexpectedly, the copresence of rNAu-2/rSWy-2 and DFOB inhibited U-(IV) oxidation, possibly due to (1) blockage of the electron transport pathway by DFOB, (2) inability of DFOB-complexed Fe-(III) to oxidize U-(IV), and (3) stability of the U-(IV)-DFOB complex in the clay interlayers. These findings provide novel insights into the stability of U-(IV) in the environment and have important implications for the remediation of uranium contamination. |
| Keyword | U(IV) oxidation bioreduced clay minerals organic ligands Fe(II) oxidation |
| WOS ID | WOS:001148186700001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/76171 |
| Collection | 中国科学院矿物学与成矿学重点实验室 |
| Corresponding Author | Zhang, Limin; Dong, Hailiang |
| Affiliation | 1.China Univ Geosci, Ctr Geomicrobiol & Biogeochem Res, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China 2.China Univ Geosci, Sch Water Resources & Environm, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Microbiol, State Key Lab Microbial Resources, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Runjie,Zhang, Limin,Chen, Yu,et al. Oxidation of Biogenic U(IV) in the Presence of Bioreduced Clay Minerals and Organic Ligands[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2024,58(3):1541-1550. |
| APA | Li, Runjie.,Zhang, Limin.,Chen, Yu.,Xia, Qingyin.,Liu, Dong.,...&Dong, Hailiang.(2024).Oxidation of Biogenic U(IV) in the Presence of Bioreduced Clay Minerals and Organic Ligands.ENVIRONMENTAL SCIENCE & TECHNOLOGY,58(3),1541-1550. |
| MLA | Li, Runjie,et al."Oxidation of Biogenic U(IV) in the Presence of Bioreduced Clay Minerals and Organic Ligands".ENVIRONMENTAL SCIENCE & TECHNOLOGY 58.3(2024):1541-1550. |
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