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Li F, Huang X, Wang S, Zhang H, Ma J, Ding Y, Ding D. Synergistic effects of hydrogen peroxide and phosphate on uranium(VI) immobilization: implications for the remediation of groundwater at decommissioned in situ leaching uranium mine. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:117132-117142. [PMID: 37864694 DOI: 10.1007/s11356-023-30468-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 10/10/2023] [Indexed: 10/23/2023]
Abstract
The processes of acid in situ leaching (ISL) uranium (U) mines cause the pollution of groundwater. Phosphate (PO43-) has the potential to immobilize U in groundwater through forming highly insoluble phosphate minerals, but the performance is highly restricted by low pH and high sulfate concentration. In this study, hydrogen peroxide (H2O2) and PO43- were synergistically used for immobilizing U based on the specific properties of groundwater from a decommissioned acid ISL U mine. The removal mechanisms of U and the stability of U on the formed minerals were elucidated by employing X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and kinetic experiments. Our results indicated that the removal of U by simultaneously adding H2O2 and PO43- was significantly higher than the removal of U by individually adding H2O2 or PO43-. The removal of U increased with increasing PO43- concentration from 20 to 200 mg L-1 while decreased with increasing H2O2 concentration from 0.003 to 0.3%. Specifically, the removal efficiency of U from groundwater reached 98% after the application of 0.003% H2O2 and 200 mg L-1 PO43-. Amorphous iron phosphate that preferentially formed at low H2O2 and high PO43- concentrations played a dominant role in U removal, while the formations of schwertmannite and crystalline iron phosphates may be also contributed to the removal of U. This was significantly different from the immobilization mechanism of U through the formation of uranyl phosphate minerals after adding phosphate. The kinetic experimental results suggested that the immobilized U had a good stability. Our research may provide a promising method for in situ remediating U-contaminated groundwater at the decommissioned acid ISL U mines.
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Affiliation(s)
- Feng Li
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, People's Republic of China
- School of Resource & Environment and Safety Engineering, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Xixian Huang
- School of Resource & Environment and Safety Engineering, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Shasha Wang
- School of Resource & Environment and Safety Engineering, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Hui Zhang
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, People's Republic of China
- School of Resource & Environment and Safety Engineering, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Jianhong Ma
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, People's Republic of China
- School of Resource & Environment and Safety Engineering, University of South China, Hengyang, Hunan, 421001, People's Republic of China
| | - Yang Ding
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, People's Republic of China.
- School of Resource & Environment and Safety Engineering, University of South China, Hengyang, Hunan, 421001, People's Republic of China.
| | - Dexin Ding
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, People's Republic of China
- School of Resource & Environment and Safety Engineering, University of South China, Hengyang, Hunan, 421001, People's Republic of China
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Seder-Colomina M, Mangeret A, Bauda P, Brest J, Stetten L, Merrot P, Julien A, Diez O, Barker E, Billoir E, Poupin P, Thouvenot A, Cazala C, Morin G. Influence of microorganisms on uranium release from mining-impacted lake sediments under various oxygenation conditions. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:1830-1843. [PMID: 36082760 DOI: 10.1039/d2em00104g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Microbial processes can be involved in the remobilization of uranium (U) from reduced sediments under O2 reoxidation events such as water table fluctuations. Such reactions could be typically encountered after U-bearing sediment dredging operations. Solid U(IV) species may thus reoxidize into U(VI) that can be released in pore waters in the form of aqueous complexes with organic and inorganic ligands. Non-uraninite U(IV) species may be especially sensitive to reoxidation and remobilization processes. Nevertheless, little is known regarding the effect of microbially mediated processes on the behaviour of U under these conditions.
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Affiliation(s)
- Marina Seder-Colomina
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SEDRE, 31 avenue de la Division Leclerc, 92260 Fontenay-aux-Roses, France.
| | - Arnaud Mangeret
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SEDRE, 31 avenue de la Division Leclerc, 92260 Fontenay-aux-Roses, France.
| | - Pascale Bauda
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
| | - Jessica Brest
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université -MNHN-IRD, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Lucie Stetten
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SEDRE, 31 avenue de la Division Leclerc, 92260 Fontenay-aux-Roses, France.
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université -MNHN-IRD, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Pauline Merrot
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université -MNHN-IRD, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Anthony Julien
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SEDRE, 31 avenue de la Division Leclerc, 92260 Fontenay-aux-Roses, France.
| | - Olivier Diez
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SEDRE, 31 avenue de la Division Leclerc, 92260 Fontenay-aux-Roses, France.
| | - Evelyne Barker
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SEDRE, 31 avenue de la Division Leclerc, 92260 Fontenay-aux-Roses, France.
| | - Elise Billoir
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
| | - Pascal Poupin
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
| | | | - Charlotte Cazala
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SEDRE, 31 avenue de la Division Leclerc, 92260 Fontenay-aux-Roses, France.
| | - Guillaume Morin
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université -MNHN-IRD, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
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3
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Sahoo PK, Virk HS, Powell MA, Kumar R, Pattanaik JK, Salomão GN, Mittal S, Chouhan L, Nandabalan YK, Tiwari RP. Meta-analysis of uranium contamination in groundwater of the alluvial plains of Punjab, northwest India: Status, health risk, and hydrogeochemical processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:151753. [PMID: 34822893 DOI: 10.1016/j.scitotenv.2021.151753] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 11/07/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
Despite numerous studies, there are many knowledge gaps in our understanding of uranium (U) contamination in the alluvial aquifers of Punjab, India. In this study, a large hydrogeochemical dataset was compiled to better understand the major factors controlling the mobility and enrichment of uranium (U) in this groundwater system. The results showed that shallow groundwaters (<60 m) are more contaminated with U than from deeper depths (>60 m). This effect was predominant in the Southwest districts of the Malwa, facing significant risk due to chemical toxicity of U. Groundwaters are mostly oxidizing and alkaline (median pH: 7.25 to 7.33) in nature. Spearman correlation analysis showed that U concentrations are more closely related to total dissolved solids (TDS), salinity, Na, K, HCO3-, NO3- Cl-, and F- in shallow water than deep water, but TDS and salinity remained highly correlated (U-TDS: ρ = 0.5 to 0.6; U-salinity: ρ = 0.5). This correlation suggests that the salt effect due to high competition between ions is the principal cause of U mobilization. This effect is evident when the U level increased with increasing mixed water species (Na-Cl, Mg-Cl, and Na-HCO3). Speciation data showed that the most dominant U species are Ca2UO2(CO3)2- and CaUO2(CO3)3-, which are responsible for the U mobility. Based on the field parameters, TDS along with pH and oxidation-reduction potential (ORP) were better fitted to U concentration above the WHO guideline value (30 μg.L-1), thus this combination could be used as a quick indicator of U contamination. The strong positive correlation of U with F- (ρ = 0.5) in shallow waters indicates that their primary source is geogenic, while anthropogenic factors such as canal irrigation, groundwater table decline, and use of agrochemicals (mainly nitrate fertilizers) as well as climate-related factors i.e., high evaporation under arid/semi-arid climatic conditions, which result in higher redox and TDS/salinity levels, may greatly affect enrichment of U. The geochemical rationale of this study will provide Science-based-policy implications for U health risk assessment in this region and further extrapolate these findings to other arid/semi-arid areas worldwide.
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Affiliation(s)
- Prafulla Kumar Sahoo
- Department of Environmental Science and Technology, Central University of Punjab, V.P.O. Ghudda, 151401 Bathinda, India; Instituto Tecnológico Vale (ITV), Rua Boaventura da Silva, 955, Belém 66055-090, PA, Brazil.
| | | | - Mike A Powell
- Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Ravishankar Kumar
- Department of Environmental Science and Technology, Central University of Punjab, V.P.O. Ghudda, 151401 Bathinda, India
| | | | | | - Sunil Mittal
- Department of Environmental Science and Technology, Central University of Punjab, V.P.O. Ghudda, 151401 Bathinda, India
| | - Lokesh Chouhan
- Department of Environmental Science and Technology, Central University of Punjab, V.P.O. Ghudda, 151401 Bathinda, India
| | | | - Raghavendra Prasad Tiwari
- Department of Environmental Science and Technology, Central University of Punjab, V.P.O. Ghudda, 151401 Bathinda, India
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Velasco CA, Brearley AJ, Gonzalez-Estrella J, Ali AMS, Meza MI, Cabaniss SE, Thomson BM, Forbes TZ, Lezama Pacheco JS, Cerrato JM. From Adsorption to Precipitation of U(VI): What is the Role of pH and Natural Organic Matter? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:16246-16256. [PMID: 34797046 PMCID: PMC8680647 DOI: 10.1021/acs.est.1c05429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We investigated interfacial reactions of U(VI) in the presence of Suwannee River natural organic matter (NOM) at acidic and neutral pH. Laboratory batch experiments show that the adsorption and precipitation of U(VI) in the presence of NOM occur at pH 2 and pH 4, while the aqueous complexation of U by dissolved organic matter is favored at pH 7, preventing its precipitation. Spectroscopic analyses indicate that U(VI) is mainly adsorbed to the particulate organic matter at pH 4. However, U(VI)-bearing ultrafine to nanocrystalline solids were identified at pH 4 by electron microscopy. This study shows the promotion of U(VI) precipitation by NOM at low pH which may be relevant to the formation of mineralized deposits, radioactive waste repositories, wetlands, and other U- and organic-rich environmental systems.
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Affiliation(s)
- Carmen A Velasco
- Department of Civil, Construction and Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Adrian J Brearley
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Jorge Gonzalez-Estrella
- School of Civil and Environmental Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Abdul-Mehdi S Ali
- Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - María Isabel Meza
- Department of Civil, Construction and Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Stephen E Cabaniss
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Bruce M Thomson
- Department of Civil, Construction and Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Tori Z Forbes
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Juan S Lezama Pacheco
- Department of Earth System Science, Stanford University, Stanford, California 94305, United States
| | - José M Cerrato
- Department of Civil, Construction and Environmental Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States
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Diagenetic formation of uranium-silica polymers in lake sediments over 3,300 years. Proc Natl Acad Sci U S A 2021; 118:2021844118. [PMID: 33479173 DOI: 10.1073/pnas.2021844118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The long-term fate of uranium-contaminated sediments, especially downstream former mining areas, is a widespread environmental challenge. Essential for their management is the proper understanding of uranium (U) immobilization mechanisms in reducing environments. In particular, the long-term behavior of noncrystalline U(IV) species and their possible evolution to more stable phases in subsurface conditions is poorly documented, which limits our ability to predict U long-term geochemical reactivity. Here, we report direct evidence for the evolution of U speciation over 3,300 y in naturally highly U-enriched sediments (350-760 µg ⋅ g-1 U) from Lake Nègre (Mercantour Massif, Mediterranean Alps, France) by combining U isotopic data (δ238U and (234U/238U)) with U L 3 -edge X-ray absorption fine structure spectroscopy. Constant isotopic ratios over the entire sediment core indicate stable U sources and accumulation modes, allowing for determination of the impact of aging on U speciation. We demonstrate that, after sediment deposition, mononuclear U(IV) species associated with organic matter transformed into authigenic polymeric U(IV)-silica species that might have partially converted to a nanocrystalline coffinite (UIVSiO4·nH2O)-like phase. This diagenetic transformation occurred in less than 700 y and is consistent with the high silica availability of sediments in which diatoms are abundant. It also yields consistency with laboratory studies that proposed the formation of colloidal polynuclear U(IV)-silica species, as precursors for coffinite formation. However, the incomplete transformation observed here only slightly reduces the potential lability of U, which could have important implications to evaluate the long-term management of U-contaminated sediments and, by extension, of U-bearing wastes in silica-rich subsurface environments.
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Hua Y, Li D, Gu T, Wang W, Li R, Yang J, Zhang WX. Enrichment of Uranium from Aqueous Solutions with Nanoscale Zero-valent Iron: Surface Chemistry and Application Prospect. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21040160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tian T, Zhou K, Xuan L, Zhang JX, Li YS, Liu DF, Yu HQ. Exclusive microbially driven autotrophic iron-dependent denitrification in a reactor inoculated with activated sludge. WATER RESEARCH 2020; 170:115300. [PMID: 31756614 DOI: 10.1016/j.watres.2019.115300] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/06/2019] [Accepted: 11/08/2019] [Indexed: 06/10/2023]
Abstract
Autotrophic iron-dependent denitrification (AIDD) is arising as a promising process for nitrogen removal from wastewater with a low carbon to nitrogen ratio. However, there is still a debate about the existence of such a process in activated sludge systems. This work provides evidence and elucidated the feasibility of autotrophic Fe(II)-oxidizing nitrate-reducing culture for nitrogen removal by long-term reactor operation, batch experimental verification, unstructured kinetic modeling and microbial community analyses. A relatively stable nitrate removal rate was achieved coupled with the oxidation of ferrous ions in 3-month operation of reactor. The kinetic modeling suggests that the iron oxidation was a growth-associated process in AIDD. Utilization of extracellular polymeric substances (and/or soluble microbial products) as electron donor for denitrification by heterotrophic denitrifiers was not mainly responsible for nitrogen removal in the reactor. After long-term operation of the reactor with activated sludge as inoculum, the enrichment culture KS-like consortium, dominated by Fe(II) oxidizer, Gallionellaceae, was successfully acclimated for autotrophic Fe(II)-oxidizing nitrate reduction. This work extents our understanding about the existence of such an autotrophic Fe(II)-oxidizing nitrate-reducing culture in both natural and engineered systems, and opens a door for its potential application in wastewater treatment.
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Affiliation(s)
- Tian Tian
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Ke Zhou
- School of Resources & Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Liang Xuan
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China; School of Environmental Science & Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China
| | - Jing-Xiao Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yu-Sheng Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Dong-Feng Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China; School of Resources & Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
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Stetten L, Lefebvre P, Le Pape P, Mangeret A, Blanchart P, Merrot P, Brest J, Julien A, Bargar JR, Cazala C, Morin G. Experimental redox transformations of uranium phosphate minerals and mononuclear species in a contaminated wetland. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121362. [PMID: 31634806 DOI: 10.1016/j.jhazmat.2019.121362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/27/2019] [Accepted: 09/29/2019] [Indexed: 06/10/2023]
Abstract
Reducing conditions and high organic carbon content make wetlands favorable to uranium (U) sequestration. However, such environments are subjected to water-table fluctuations that could impact the redox behavior of U and its mobility. Our previous study on U speciation in a contaminated wetland has suggested a major role of water-table redox fluctuations in the redistribution of U from U(IV)-phosphate minerals to organic U(VI) and U(IV) mononuclear species. Here, we investigate the mechanisms of these putative processes by mimicking drying or flooding periods via laboratory incubations of wetland samples. LCF-XANES and EXAFS analyses show the total oxidation/reduction of U(IV)/U(VI)-mononuclear species after 20 days of oxic/anoxic incubation, whereas U-phosphate minerals are partly oxidized/reduced. SEM-EDXS combined with μ-XRF and μ-XANES analyses suggest that autunite Ca(UO2)2(PO4)2⋅11H2O is reduced into lermontovite U(PO4)(OH)⋅H2O, whereas oxidized ningyoite CaU(PO4)2⋅2H2O is locally dissolved. The release of U from this latter process is observed to be limited by U(VI) adsorption to the soil matrix and further re-reduction into mononuclear U(IV) upon anoxic cycling. Analysis of incubation waters show, however, that dissolved organic carbon enhances U solubilization even under anoxic conditions. This study brings important information that help to assess the long-term stability of U in seasonally saturated organic-rich contaminated environments.
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Affiliation(s)
- Lucie Stetten
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université-IRD-MNHN, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France; Institut de Radioprotection et de Sûreté Nucléaire, IRSN, 31 avenue de la Division Leclerc, 92262 Fontenay-aux-Roses, France; University of Vienna, Centre for Microbiology and Environmental Systems Science, Department of Environmental Geosciences, Althanstraße 14, UZA II, 1090 Vienna, Austria.
| | - Pierre Lefebvre
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université-IRD-MNHN, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Pierre Le Pape
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université-IRD-MNHN, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Arnaud Mangeret
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, 31 avenue de la Division Leclerc, 92262 Fontenay-aux-Roses, France
| | - Pascale Blanchart
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, 31 avenue de la Division Leclerc, 92262 Fontenay-aux-Roses, France
| | - Pauline Merrot
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université-IRD-MNHN, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Jessica Brest
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université-IRD-MNHN, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Anthony Julien
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, 31 avenue de la Division Leclerc, 92262 Fontenay-aux-Roses, France
| | - John R Bargar
- Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator National Laboratory, MS 69, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Charlotte Cazala
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, 31 avenue de la Division Leclerc, 92262 Fontenay-aux-Roses, France
| | - Guillaume Morin
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), UMR 7590 CNRS-Sorbonne Université-IRD-MNHN, case 115, 4 place Jussieu, 75252 Paris Cedex 5, France
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9
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Stetten L, Blanchart P, Mangeret A, Lefebvre P, Le Pape P, Brest J, Merrot P, Julien A, Proux O, Webb SM, Bargar JR, Cazala C, Morin G. Redox Fluctuations and Organic Complexation Govern Uranium Redistribution from U(IV)-Phosphate Minerals in a Mining-Polluted Wetland Soil, Brittany, France. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:13099-13109. [PMID: 30339761 DOI: 10.1021/acs.est.8b03031] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Wetlands have been proposed to naturally attenuate U transfers in the environment via U complexation by organic matter and potential U reduction. However, U mobility may depend on the identity of particulate/dissolved uranium source materials and their redox sensitivity. Here, we examined the fate of uranium in a highly contaminated wetland (up to 4500 mg·kg-1 U) impacted by former mine water discharges. Bulk U LIII-EXAFS and (micro-)XANES combined with SEM-EDXS analyses of undisturbed soil cores show a sharp U redox boundary at the water table, together with a major U redistribution from U(IV)-minerals to U(VI)-organic matter complexes. Above the water table, U is fully oxidized into mono- and bidentate U(VI)-carboxyl and monodentate U(VI)-phosphoryl complexes. Minute amounts of U(VI)-phosphate minerals are also observed. Below the water table, U is fully reduced and is partitioned between U(IV)-phosphate minerals (i.e., ningyoite and a lermontovite-like phase), and bidentate U(IV)-phosphoryl and monodentate U(IV)-carboxyl complexes. Such a U redistribution from U-minerals inherited from mine water discharge deposits could result from redox cycling nearby the water table fluctuation zone. Oxidative dissolution of U(IV)-phosphate minerals could have led to U(VI)-organic matter complexation, followed by subsequent reduction into U(IV)-organic complexes. However, uranium(IV) minerals could have been preserved in permanently waterlogged soil.
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Affiliation(s)
- Lucie Stetten
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) , UMR 7590 CNRS-Sorbonne Université-IRD-MNHN , case 115, 4 place Jussieu , 75252 Paris Cedex 5, France
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN , 31 Avenue de la Division Leclerc , 92262 Fontenay-aux-Roses , France
| | - Pascale Blanchart
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN , 31 Avenue de la Division Leclerc , 92262 Fontenay-aux-Roses , France
| | - Arnaud Mangeret
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN , 31 Avenue de la Division Leclerc , 92262 Fontenay-aux-Roses , France
| | - Pierre Lefebvre
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) , UMR 7590 CNRS-Sorbonne Université-IRD-MNHN , case 115, 4 place Jussieu , 75252 Paris Cedex 5, France
| | - Pierre Le Pape
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) , UMR 7590 CNRS-Sorbonne Université-IRD-MNHN , case 115, 4 place Jussieu , 75252 Paris Cedex 5, France
| | - Jessica Brest
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) , UMR 7590 CNRS-Sorbonne Université-IRD-MNHN , case 115, 4 place Jussieu , 75252 Paris Cedex 5, France
| | - Pauline Merrot
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) , UMR 7590 CNRS-Sorbonne Université-IRD-MNHN , case 115, 4 place Jussieu , 75252 Paris Cedex 5, France
| | - Anthony Julien
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN , 31 Avenue de la Division Leclerc , 92262 Fontenay-aux-Roses , France
| | - Olivier Proux
- Université Grenoble Alpes, CNRS, IRD Irstea Météo, OSUG, FAME , 38000 Grenoble , France
- BM30B/CRG-FAME, ESRF , Polygone Scientifique Louis Néel , 71 avenue des Martyrs , 38000 Grenoble , France
| | - Samuel M Webb
- Stanford Synchrotron Radiation Lightsource (SSRL) , SLAC National Accelerator National Laboratory , MS 69, 2575 Sand Hill Road , Menlo Park , California 94025 , United States
| | - John R Bargar
- Stanford Synchrotron Radiation Lightsource (SSRL) , SLAC National Accelerator National Laboratory , MS 69, 2575 Sand Hill Road , Menlo Park , California 94025 , United States
| | - Charlotte Cazala
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN , 31 Avenue de la Division Leclerc , 92262 Fontenay-aux-Roses , France
| | - Guillaume Morin
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) , UMR 7590 CNRS-Sorbonne Université-IRD-MNHN , case 115, 4 place Jussieu , 75252 Paris Cedex 5, France
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