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Shang C, Gaona X, Oher H, Polly R, Skerencak-Frech A, Duckworth S, Altmaier M. Experimental and computational evidence of U(VI)-OH-Si(OH) 4 complexes under alkaline conditions: Implications for cement systems. CHEMOSPHERE 2024; 350:141048. [PMID: 38182084 DOI: 10.1016/j.chemosphere.2023.141048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 01/07/2024]
Abstract
The complexation of uranyl hydroxides with orthosilicic acid was investigated by experimental and theoretical methods. Spectroluminescence titration was performed in a glovebox under argon atmosphere at pH 9.2, 10.5 and 11.5, with [U(VI)] = 10-6 and 5 × 10-6 mol kgw-1. The polymerization effects of silicic acid were minimized by ruling out samples with less than 90 % monomeric silicic acid present, identified via UV-Vis spectrometry using the molybdate blue method. Linear regression analysis based on time-resolved laser-induced fluorescence spectroscopy (TRLFS) results yielded the conditional stepwise formation constants of U(VI)-OH-Si(OH)4 complexes at 0.05 mol kgw-1 NaNO3. The main spectroscopic features - characteristic peak positions and decay-time - are reported for the first time for the UO2(OH)2SiO(OH)3- species observed at pH 9.2 and 10.5 and UO2(OH)2SiO2(OH)22- predominant at pH 11.5. Quantum chemical calculations successfully computed the theoretical luminescence spectrum of the complex UO2(OH)2SiO(OH)3- species, thus underpinning the proposed chemical model for weakly alkaline systems. The conditional stability constants were extrapolated to infinite dilution using the Davies equation, resulting in log10β°(UO2(OH)2SiO(OH)3-) and log10β°(UO2(OH)2SiO2(OH)22-). Implications for U(VI) speciation in the presence and absence of competing carbonate are discussed for silicate-rich environments expected in certain repository concepts for nuclear waste disposal.
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Affiliation(s)
- Chengming Shang
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany.
| | - Xavier Gaona
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany.
| | - Hanna Oher
- Laboratoire de Physique des 2 Infinis Irène Juliot-Curie (IJCLab), CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - Robert Polly
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Andrej Skerencak-Frech
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Sarah Duckworth
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Marcus Altmaier
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
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2
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Shang C, Coreau N, Macé N, Descostes M, Reiller PE. Implications of recently derived thermodynamic data and specific ionic interaction theory parameters for (Mg/Ca) nUO 2(CO 3) 3(4-2n)- complexes on the predominance of the Mg 2+-Ca 2+-UO 22+-OH --CO 32- systems, and application to natural and legacy-mine waters. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159927. [PMID: 36343816 DOI: 10.1016/j.scitotenv.2022.159927] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/24/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
The formation of alkaline earth(II)triscarbonatouranyl(VI) (AenUO2(CO3)3(4-2n)-) species that have been evidenced both in laboratory and in-field studies, is important from slightly acidic pH up to near degraded cementitious in carbonated waters. They are also showing distinctive luminescence properties with a hypsochromic shift relative to UO22+. The conditions of pH, activities of alkaline earth(II) free ions (mostly Mg2+ and Ca2+) and carbonate ions (HCO3-) can be predicted from the thermodynamic functions and constants. The predictive validity of the activity of major alkaline ions (mostly Na+) is determined from the models used to describe the ionic strength comportment of these species, particularly using coefficients from the specific ion interaction theory (SIT). The stability domains of these species are better defined as a function of the activity of the constituents, and applied to natural waters. In this work, using recently obtained complete thermodynamic data and SIT coefficients, we will draw the stability domains of the AenUO2(CO3)3(4-2n)- species in combinations of activities of H+, HCO3-, Mg2+, Ca2+, and Na+ for a wide selection of water compositions from the literature. Water samples were collected near a French mining legacy-site (Site du Bosc, Lodève, France). After determining the major ion compositions, we will verify that the luminescence signal of uranium is in agreement with the predicted speciation in the stability domains.
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Affiliation(s)
- Chengming Shang
- Université Paris-Saclay, CEA, Service d'Études Analytiques et de Réactivité des Surfaces (SEARS), F-91191 Gif-sur-Yvette CEDEX, France
| | - Nathalie Coreau
- Université Paris-Saclay, CEA, Service d'Études du Comportement des Radionucléïdes (SECR), F-91191 Gif-sur-Yvette CEDEX, France
| | - Nathalie Macé
- Université Paris-Saclay, CEA, Service d'Études du Comportement des Radionucléïdes (SECR), F-91191 Gif-sur-Yvette CEDEX, France
| | - Michael Descostes
- ORANO Mining, Environmental R&D Department, 125 Avenue de Paris, 92330 Châtillon, France; PSL University/Mines ParisTech, Centre de Géosciences, 35 rue Saint-Honoré, 77305 Fontainebleau, France
| | - Pascal E Reiller
- Université Paris-Saclay, CEA, Service d'Études Analytiques et de Réactivité des Surfaces (SEARS), F-91191 Gif-sur-Yvette CEDEX, France.
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Smolíková V, Pelcová P, Ridošková A, Leermakers M. Diffusive Gradients in Thin-films technique for uranium monitoring along a salinity gradient: A comparative study on the performance of Chelex-100, Dow-PIWBA, Diphonix, and Lewatit FO 36 resin gels in the Scheldt estuary. Talanta 2021; 240:123168. [PMID: 34954614 DOI: 10.1016/j.talanta.2021.123168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/10/2021] [Accepted: 12/21/2021] [Indexed: 10/19/2022]
Abstract
Monitoring of uranium in the environment using the Diffusive Gradients in Thin-films (DGT) technique gains in importance as it can provide unique information about the bioavailability of the element and allows its long-term in-situ measurement. Hence, in this study, four DGT binding phases (Chelex-100, Dow-PIWBA, Diphonix, and Lewatit FO 36 resins) were evaluated for uranium monitoring to assess the robustness of their performance in estuarine and marine environments. These DGTs were deployed along the Scheldt estuary (Belgium and the Netherlands) over four campaigns between 2014 and 2021. The DGT performance (ratio of the DGT-determined vs. dissolved U concentration in grab water sample) varied with the water salinity. The Chelex-100 DGTs generally provided good performance in freshwater (median ratios close to 1.0), but an inverse correlation with the increasing salinity was observed (median ratios 0.7 at the stations with salinity >5). The Lewatit FO 36 DGTs provided good performance in the salinity range 0-18 (median ratios 1.0). However, a strong negative influence was observed at stations with high salinity levels (>18, ratio 0.6) and during the long-term deployment in seawater (ratios <0.5 over deployment periods ≥2 days). The Dow-PIWBA and Diphonix DGTs provided overall similar results with excellent performances along the whole salinity gradient (median ratios 1.1 and 1.0, respectively). Nevertheless, the long-term deployment trial in seawater (salinity ∼27) revealed the robustness of Diphonix DGTs that provided outstanding results even after 28 days of deployment (ratio 1.0). The differences in the performance of tested DGT resins were mostly given by the changes of U speciation along the salinity gradient. The speciation modelling of U showed that calcium uranyl carbonate complexes dominate along the Scheldt estuary (from 97 to 86% seawards) with increasing fraction of UO2(CO3)34- (from 2 to 14%) towards the mouth.
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Affiliation(s)
- Vendula Smolíková
- Analytical, Environmental and Geochemistry, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium; Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Pavlína Pelcová
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Andrea Ridošková
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Martine Leermakers
- Analytical, Environmental and Geochemistry, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium.
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Elashry SM, Labib S, Attallah MF. Sorption behavior of natural uranium from aqueous solutions using modified activated carbon with quinoline. RADIOCHIM ACTA 2021. [DOI: 10.1515/ract-2021-1071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The activated carbon (AC) was modified by molecules of quinoline (Q) and the new prepared AC impregnated by Q was characterized using Fourier transform infrared (FTIR), Raman spectroscopy, surface measurements, scanning electron microscope (SEM) and transmission electron microscope (TEM). These analytical techniques demonstrated a successful preparation of AC-Q as a new material which was examined for its sorption behavior for natural uranium. The sorption results by batch mode indicated the optimum conditions for 94.5% removal of U(VI) ions at pH 4.7 and an equilibrium contact time of 90 min. The analysis of sorption data revealed that the pseudo-second-order and Langmuir were more fitted than other estimated models. The sorption capacity of U(VI) was ∼63 mg/g onto AC-Q as adsorbent martial. The thermodynamic data demonstrated that the sorption of uranium is endothermic and spontaneous. New mechanism was supposed based on the role of the abrasive material quinoline on the mechanical removal of uranium from aqueous solution.
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Affiliation(s)
- Soaad M. Elashry
- Isotopes Geology Department , Researches Sector, Nuclear Materials Authority , 530 Katamia , Cairo , Egypt
| | - Shiraz Labib
- Nuclear Chemistry Department , Hot Laboratories Center, Egyptian Atomic Energy Authority , 13759 Abu Zaabal , Cairo , Egypt
| | - Mohamed F. Attallah
- Analytical Chemistry and Control Department , Hot Laboratories Center, Egyptian Atomic Energy Authority , 13759 Abu Zaabal , Cairo , Egypt
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Deng H, Luo M, Su M, Chen D, Liu Y, Peng W, Liao S, Yu Z, Luo J, Xiao T. Geochemical distribution and speciation of Tl and other trace metals in upper Beijiang River in South China: Approach of in-situ DGT monitoring. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 800:149636. [PMID: 34426312 DOI: 10.1016/j.scitotenv.2021.149636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 07/21/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Mining activities frequently result in severe contamination of river water. This study aimed to better understand the spatial distribution characteristics of Tl and other metals (e.g., Al, Cd, Co, Mn, Ni, Zn, Pb, V, As, Mo, and Sb), and to assess their risks to human health. Surface water samples were collected from the upper Beijiang River (South China) via grab sampling and the diffusive gradients in thin-films (DGT) technique. The concentrations of Tl measured by grab sampling and δ-MnO2-DGT ranged from 0.045 μg L-1 to 0.231 μg L-1 and from 0.056 μg L-1 to 0.131 μg L-1, respectively. Most of the metals monitored were below the threshold levels allowed by the drinking water standard in China, except for As, Sb, and Mn at specific sampling sites. The concentrations of other metals measured by grab sampling were higher than those measured using the DGT technique because of the differences in speciation during these measurements. The hazard quotient (5.43 × 10-4-8.0 × 10-1 for grab sampling and 2.23 × 10-4-2.8 × 10-1 for DGT technique) for the monitored trace metals demonstrated minimal health risk to human beings. The pollution status of these toxic metals in the study area was generally acceptable. As was found to be potentially the most harmful metal in the studied area, with hazard quotients at some sampling sites calculated by grab sampling of >1. It has previously been suggested that As is the most important non-carcinogenic contaminant. The combination of grab sampling and the DGT technique provides a comprehensive understanding of trace metals, especially Tl, in terms of potential bioavailability and ecological assessment.
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Affiliation(s)
- Hongmei Deng
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Mengting Luo
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Minhua Su
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
| | - Diyun Chen
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Yu Liu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Wenkan Peng
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Shiping Liao
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zhiqiang Yu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Jun Luo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Tangfu Xiao
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China.
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6
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Abdulbur-Alfakhoury E, Leermakers M. Elimination of interferences in the determination of platinum, palladium and rhodium by diffusive gradients in thin films (DGT) and inductively coupled plasma mass spectrometry (ICP MS) using selective elution. Talanta 2021; 223:121771. [PMID: 33298280 DOI: 10.1016/j.talanta.2020.121771] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/08/2020] [Accepted: 10/11/2020] [Indexed: 10/23/2022]
Abstract
The analysis of platinum (Pt), palladium (Pd) and rhodium (Rh) in aquatic samples by the diffusive gradients in thin films (DGT) technique using chelating resins, specific designed for the accumulation of PGEs, namely Purolite S914, S920 and Italmatch Chemicals IONQUEST® MPX-317. may however, still be influenced by the accumulation of other elements such (Cu, Zn, Pb, etc.) which will be extracted simultaneously by the hot aqua regia extraction and interfere with the Inductively Coupled Plasma Mass Spectrometry (ICPMS) analysis of the Platinum Group Elements (PGEs). Selective extractions were investigated to release the interfering elements without loss of the Platinum Group Elements (PGEs) from the resin gels. . A rinse with deionized water removes over 95% of Sr and Rb and a second rinse with 0.05 mol L-1 H2SO4 can be used to as a common eluent to remove an important fraction of the interfering elements from S920 and S914 without loss of PGEs but this results in loss of around 15% of the PGEs from MPX-317. It was shown that selective extractions can be used to remove specific interferences from each resin gel.
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Affiliation(s)
- Ehab Abdulbur-Alfakhoury
- Analytical, Environmental and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050, Brussels, Belgium.
| | - Martine Leermakers
- Analytical, Environmental and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050, Brussels, Belgium
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Reiller PE, Descostes M. Development and application of the thermodynamic database PRODATA dedicated to the monitoring of mining activities from exploration to remediation. CHEMOSPHERE 2020; 251:126301. [PMID: 32145577 DOI: 10.1016/j.chemosphere.2020.126301] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 11/19/2019] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
A growing demand exists on the monitoring of both uranium mining activities and their environmental impacts. In order to help understanding and modelling both these aspects, a thermodynamic database dedicated to uranium mining activities is developed: the PRODATA database. Relevant species and phases for uranium and radium are chosen from existing compilations of data, complemented with important missing data for the application to mining activities and environmental monitoring. Important major anions and cations chemistry are included, as well as secondary pollutants such as arsenic, lead, or nickel. Applications of the PRODATA extracted database file for PhreeqC to theoretical speciation calculations of uranium and radium for actual water compositions - either linked to uranium mining activities, or under monitoring for environmental survey - are presented. Wider applications to other available water compositions from different geochemical concepts are also tested. For the tested cases, the major radium and uranium species obtained using PRODATA are compared with other available thermodynamic database (Thermochimie, LLNL, Wateq4f, Minteq, PSI/NAGRA). The choice of the database file - and of the ionic strength correction - can strongly impact the final speciation results. Sulphate complexes of radium and uranium are of particular importance in mining exploitation context, and carbonate uranium complexes - particularly [Formula: see text] complexes - are crucial for environmental monitoring. The latter complexes are key species for the aqueous speciation of uranium, even in reducing environment where U(IV) low solubility usually governs uranium mobility.
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Affiliation(s)
- Pascal E Reiller
- Den - Service D'Études Analytiques et de Réactivité des Surfaces (SEARS), CEA, Université Paris-Saclay, F-91191, Gif-sur-Yvette, France.
| | - Michaël Descostes
- ORANO Group Mining R&D Dpt, 125 Avenue de Paris, F-92320, Châtillon, France
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Lartigue JE, Charrasse B, Reile B, Descostes M. Aqueous inorganic uranium speciation in European stream waters from the FOREGS dataset using geochemical modelling and determination of a U bioavailability baseline. CHEMOSPHERE 2020; 251:126302. [PMID: 32146184 DOI: 10.1016/j.chemosphere.2020.126302] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 02/15/2020] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
The concentration of the bioavailable uranium fraction (Ubio) at the European scale was deduced by geochemical modelling considering several definitions found in the literature and the FOREGS European stream waters geochemical atlas dataset to produce a Ubio baseline. A sensitivity analysis was performed using three thermodynamic databases. We also investigated the link between total dissolved uranium (Uaq) concentrations, speciation and global stream water chemistry on the one hand, and the lithology and ages of the surrounding rocks on the other. The more U-enriched the stream sediments or rock type contexts are, which tends to be the case with rocks containing silicates (4.1 mg/kg), the less U-concentrated the stream waters are (0.15 μg/L). Sedimentary rocks lead to slightly higher Uaq concentrations (0.34 μg/L) even if the concentration in sediment (Used) is relatively low (1.6 mg/kg). This trend is reversed for Ubio, with higher concentrations in a crystalline context. The mean estimated Ubio value ranges from 1.5.10-3 to 65.3 ng/L and can fluctuate by 3 orders of magnitude depending on the considered definition as opposed to by 2 orders of magnitude accountable to differences between thermodynamic databases. The classification of the water in relation to the two surrounding rock lithologies makes it possible to reduce the mean variability for the Ubio concentrations. Irrespective of the definition of Ubio considered, in 59% of cases the Ubio fraction represents less than 1% of Uaq. Several threshold values relating to Ubio were proposed, assuming knowledge only of the aqueous concentrations of the major elements and Uaq.
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Affiliation(s)
- J E Lartigue
- CEA, DEN, DTN, Cadarache, Saint-Paul-lès-Durance Cedex, France
| | - B Charrasse
- CEA, DEN, DTN, Cadarache, Saint-Paul-lès-Durance Cedex, France
| | - B Reile
- ORANO Mining, R&D Dpt, F-92330, Châtillon, France; Cabinet Reilé, F-25290, Ornans, France
| | - M Descostes
- ORANO Mining, R&D Dpt, F-92330, Châtillon, France.
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Husson A, Leermakers M, Descostes M, Lagneau V. Environmental geochemistry and bioaccumulation/bioavailability of uranium in a post-mining context - The Bois-Noirs Limouzat mine (France). CHEMOSPHERE 2019; 236:124341. [PMID: 31545183 DOI: 10.1016/j.chemosphere.2019.124341] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 07/07/2019] [Accepted: 07/09/2019] [Indexed: 06/10/2023]
Abstract
Knowledge on the bioavailability of trace elements is essential in developing environmental quality standards. The purpose of this study was to explore the relationships between trace elements (in particular Uranium (U)) in sediments, porewater and their bioaccumulation by Chironomus riparius on a uranium mining site and river sediments upstream of the mine. The mobility and speciation of U in sediments was investigated using DGT. Geochemical modelling using CHESS provided insight on sorption behavior of U on ironoxyhydrite (HFO) and aqueous speciation of U. In the upstream site U concentrations found were 0.05 μmol g-1 in surface sediment, 0.84 nmol L-1 in porewater and 2.4 nmol g-1 in Chironomus riparius whereas in the ferrihydrite deposits on the mining sites the concentrations found were up to 9.4 μmol g-1 in surface sediment, 0.37 μmol L-1 in porewater and 0.684 μmol g-1 in in Chironomus riparius. Despite the large differences in concentrations of U between the two sites, sediment to dissolved partitioning coefficients, bioconcentration factor (BCF) and biota sediment accumulation factors (BSAF) were very comparable. In the upstream sediment binding of U to organic matter controls sorption and aqueous speciation of U, whereas in the HFO rich sediments, sorption on HFO and the formation of HFO colloids are the determining factors. The low BSAF factors and high BCF factors indicate that the bioaccumulation is due to uptake from the dissolved phase. The DGT probes with different binding resins provide information on the colloidal nature and lability of the dissolved U species.
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Affiliation(s)
- Angélique Husson
- Centre de Géosciences, MINES ParisTech, PSL University, 35 rue St Honoré, 77300, Fontainebleau, France; ORANO Mining, R&D Dpt, Paris La Defense, France
| | - Martine Leermakers
- Analytical, Environmental & Geo-Chemistry (AMGC), Vrije Universiteit Brussels (VUB), Belgium.
| | | | - Vincent Lagneau
- Centre de Géosciences, MINES ParisTech, PSL University, 35 rue St Honoré, 77300, Fontainebleau, France
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Martin A, Landesman C, Lépinay A, Roux C, Champion J, Chardon P, Montavon G. Flow period influence on uranium and trace elements release in water from the waste rock pile of the former La Commanderie uranium mine (France). JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2019; 208-209:106010. [PMID: 31302578 DOI: 10.1016/j.jenvrad.2019.106010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/25/2019] [Accepted: 06/30/2019] [Indexed: 06/10/2023]
Abstract
Uranium mining activities expose uranium ore and mine tailings to the surface environment, where the release of radionuclides is facilitated by weathering at rates exceeding those typically found in nature. Therefore, close to former uranium mining sites, radionuclides and especially uranium concentrations in water may surpass local background levels. The methodology proposed herein, entails coupling, gamma-ray mapping, water sampling and chemical analyses including DGT (Diffusive Gradient in Thin Film) measurements, provides new insights into describing the environment of the La Commanderie site (France). Gamma-ray mapping allows identifying water seepage, output from a waste rock pile, as a potential pathway for radionuclides into the environment. Water seepage monitoring has shown: a low pH value (4.2), high sulfate content (179 mg.L-1) and high uranium concentrations of up to 436 μg.L-1. These recordings indicate that an acid mining drainage (AMD) process is occurring inside or under the oxidized parts of the waste rock pile. Monitoring data over three flow periods revealed the release of the highest uranium concentrations during a high-flow period downstream of the site, which is compliant with local regulations. The AMD process is also responsible for the release of significant amounts of Fe, Mn and As within the immediate environment in both dissolved and particulate forms. Changes in dissolved oxygen concentration and redox potential during low flow periods, modify the speciation of Fe (in AMD waters) which acts as a scavenger for other elements such as As, Mn and U. The use of DGT under environmental conditions, and specifically AMD waters, seems to be relevant in comparison to filtered spot water sampling strategies. Moreover, based on DGT measurements, the dissolved part of the released uranium is considered as labile with concentrations above the environmental standards for freshwater organisms.
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Affiliation(s)
- A Martin
- SUBATECH, UMR 6457 (IMT-Atlantique, Université de Nantes, CNRS-IN2P3), 4 rue Alfred Kastler, 44307, Nantes, France
| | - C Landesman
- SUBATECH, UMR 6457 (IMT-Atlantique, Université de Nantes, CNRS-IN2P3), 4 rue Alfred Kastler, 44307, Nantes, France.
| | - A Lépinay
- Université de Nantes/OSUNA, UMR 3281, 2 rue de la Houssinière, 44322, Nantes Cedex, France
| | - C Roux
- SUBATECH, UMR 6457 (IMT-Atlantique, Université de Nantes, CNRS-IN2P3), 4 rue Alfred Kastler, 44307, Nantes, France
| | - J Champion
- SUBATECH, UMR 6457 (IMT-Atlantique, Université de Nantes, CNRS-IN2P3), 4 rue Alfred Kastler, 44307, Nantes, France
| | - P Chardon
- LPC, UMR 6533 (IN2P3/CNRS/Université Clermont Auvergne), 4 Avenue Blaise Pascal TSA60026, CS60026, 63178, Aubière Cedex, France
| | - G Montavon
- SUBATECH, UMR 6457 (IMT-Atlantique, Université de Nantes, CNRS-IN2P3), 4 rue Alfred Kastler, 44307, Nantes, France
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Abdulbur-Alfakhoury E, Van Zutphen S, Leermakers M. Development of the diffusive gradients in thin films technique (DGT) for platinum (Pt), palladium (Pd), and rhodium (Rh) in natural waters. Talanta 2019; 203:34-48. [DOI: 10.1016/j.talanta.2019.05.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 05/03/2019] [Accepted: 05/06/2019] [Indexed: 10/26/2022]
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12
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Liu C, Xing S, Zhou J, Bai F, Xing Y. Two novel d
10
transition metal complexes based on 1
H
‐benzimidazole‐5,6‐dicarboxylic acid: Synthesis, structure and multifunctional luminescence detection. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chun‐Hong Liu
- College of Chemistry and Chemical EngineeringLiaoning Normal University Huanghe Road 850 Dalian 116029 China
| | - Shang‐Hua Xing
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of ChemistryJilin University Changchun 130012 China
| | - Jun Zhou
- College of Chemistry and Chemical EngineeringLiaoning Normal University Huanghe Road 850 Dalian 116029 China
| | - Feng‐Ying Bai
- College of Chemistry and Chemical EngineeringLiaoning Normal University Huanghe Road 850 Dalian 116029 China
| | - Yong‐Heng Xing
- College of Chemistry and Chemical EngineeringLiaoning Normal University Huanghe Road 850 Dalian 116029 China
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Cheira MF, Atia BM, Kouraim MN. Uranium(VI) recovery from acidic leach liquor by Ambersep 920U SO4 resin: Kinetic, equilibrium and thermodynamic studies. JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES 2019. [DOI: 10.1016/j.jrras.2017.07.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Bahig M. Atia
- Nuclear Materials Authority, P.O. Box 530 El Maadi, Cairo, Egypt
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Pedrobom JH, Eismann CE, Menegário AA, Galhardi JA, Luko KS, Dourado TDA, Kiang CH. In situ speciation of uranium in treated acid mine drainage using the diffusion gradients in thin films technique (DGT). CHEMOSPHERE 2017; 169:249-256. [PMID: 27880923 DOI: 10.1016/j.chemosphere.2016.11.082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 11/04/2016] [Accepted: 11/15/2016] [Indexed: 05/27/2023]
Abstract
The exchange membranes P81 and DE81 and Chelex-100 resin were used to perform in situ speciation of uranium in treated acid mine drainage at the Osamu Utsumi mining site, Poços de Caldas city, Southeast Brazil. To investigate possible chemical modifications in the samples during analysis, the three ligands were deployed in situ and in a laboratory (in lab). The results obtained in situ were also compared to a speciation performed using Visual MINTEQ software. Chelex-100 retained total labile U for a period of up to 48 h. The labile U fraction determined by Chelex 100 ranged from 107 ± 6% to 147 ± 44% in situ and from 115 ± 22% to 191 ± 5% in lab. DE81 retained anionic U species up to 8 h, with labile fractions ranging from 37 ± 2% to 76 ± 3% in situ and 34 ± 12% to 180 ± 17% in lab. P81 exhibited a lower efficiency in retaining U species, with concentrations ranging from 6± 2% to 19± 2% in situ and 3± 2% to 18± 2% in lab. The speciation obtained from MINTEQ suggests that the major U species were UO2OH+, UO2(OH)3-, UO2(OH)2(aq), Ca2UO2(CO3)3(aq), CaUO2(CO3)32-, UO2(CO3)22-, and UO2(CO3)34-. This result is in accordance with the results obtained in situ. Differences concerning speciation and the total and soluble U concentrations were observed between the deployments performed in situ and in the laboratory, indicating that U speciation must be performed in situ.
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Affiliation(s)
- Jorge Henrique Pedrobom
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Carlos Eduardo Eismann
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Amauri A Menegário
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil.
| | - Juliana Aparecida Galhardi
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Karen Silva Luko
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Thiago de Araujo Dourado
- Centro de Estudos Ambientais - CEA, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
| | - Chang Hung Kiang
- Laboratório de Estudos de Bacias - LEBAC, Instituto de Geociências e Ciências Exatas - IGCE, UNESP - Univ Estadual Paulista, Avenida 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil
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Kautenburger R, Sander JM, Hein C. Europium (III) and Uranium (VI) complexation by natural organic matter (NOM): Effect of source. Electrophoresis 2016; 38:930-937. [PMID: 27922184 DOI: 10.1002/elps.201600488] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 11/28/2016] [Accepted: 11/29/2016] [Indexed: 11/09/2022]
Abstract
For the safe long-term storage of high-level radioactive waste (HLW), detailed information about geo-chemical behavior of radioactive and toxic metal ions under environmental conditions is important. Natural organic matter (NOM) can play a crucial role in the immobilization or mobilization of these metal ions due to its complexation and colloid formation tendency. In this study, the complexation of europium (as chemical homologue of trivalent actinides such as americium) and uranium (as main component of HLW) by ten humic acids (HA) from different sources and Suwannee NOM river extract has been analyzed. Capillary electrophoresis in combination with inductively coupled plasma mass spectrometry has been used for the evaluation of complex stability constants log β. In order to determine the complex stability constants a conservative single site model was used in this study. In dependence of their source and thus of NOM structure the log β values for the analyzed humic acids are in the range of 6.1-7.0 for Eu(III) and 5.2-6.4 for U(VI) (UO22+ ), respectively. In contrast to the results for HA the used Suwannee river NOM reveals log β values in the range of nearly two orders of magnitude lower (4.6 for Eu3+ and 4.5 for UO22+ ) under the geochemical conditions applied in this study.
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Affiliation(s)
- Ralf Kautenburger
- WASTe Group, Institute of Inorganic Solid State Chemistry, Saarland University, Saarbrücken, Germany
| | - Jonas M Sander
- WASTe Group, Institute of Inorganic Solid State Chemistry, Saarland University, Saarbrücken, Germany
| | - Christina Hein
- WASTe Group, Institute of Inorganic Solid State Chemistry, Saarland University, Saarbrücken, Germany
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Drozdzak J, Leermakers M, Gao Y, Phrommavanh V, Descostes M. Novel speciation method based on Diffusive Gradients in Thin Films for in situ measurement of uranium in the vicinity of the former uranium mining sites. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 214:114-123. [PMID: 27070846 DOI: 10.1016/j.envpol.2016.04.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 03/23/2016] [Accepted: 04/01/2016] [Indexed: 06/05/2023]
Abstract
The Diffusive Gradients in Thin Films (DGT) technique using PIWBA resin (The Dow Chemical Company) was developed and validated for the measurement of uranium (U) concentration in natural and uranium mining influenced waters. The U uptake on the PIWBA resin gel was 97.3 ± 0.4% (batch method; Vsol = 5 mL; [U] = 20 μg L(-1); 0.01 M NaNO3; pH = 7.0 ± 0.2). The optimal eluent was found to be HNO3conc/70 °C with an elution efficiency of 88.9 ± 1.4%. The laboratory DGT investigation demonstrated that the PIWBA resin gel exhibits a very good performance across a wide range of pH (3-9) and ionic strength (0.001-0.7 M NaNO3) at different time intervals. Neither effect of PO4(3-) (up to 1.72 × 10(-4) M), nor of HCO3(-) (up to 8.20 × 10(-3) M) on the quantitative measurement of uranium by DGT-PIWBA method were observed. Only at very high Ca(2+) (2.66 × 10(-4) M), and SO4(2-) (5.55 × 10(-4) M) concentration, the U uptake on DGT-PIWBA was appreciably lessened. In-situ DGT field evaluation was carried out in the vicinity of three former uranium mining sites in France (Loire-Atlantique and Herault departments), which employ different water treatment technologies and have different natural geochemical characteristics. There was a similar or inferior U uptake on DGT-Chelex(®)-100 in comparison with the U accumulation on a DGT-PIWBA sampler. Most likely, the performance of Chelex(®)-100 was negatively affected by a highly complex matrix of mining waters. The high concentration and identity of co-accumulating analytes, typical for the mining environment, did not have a substantial impact on the quantitative uptake of labile U species on DGT- PIWBA. The use of the polyphenol impregnated anion exchange resin leads to a significant advancement in the application and development of the DGT technique for determination of U in the vicinity of the former uranium mining sites.
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Affiliation(s)
- Jagoda Drozdzak
- Analytical, Environmental and Geochemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium.
| | - Martine Leermakers
- Analytical, Environmental and Geochemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Yue Gao
- Analytical, Environmental and Geochemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Vannapha Phrommavanh
- AREVA Mines, R&D Dpt., Tour AREVA, 1 Place Jean Millier, 92084 Paris La Défense, France
| | - Michael Descostes
- AREVA Mines, R&D Dpt., Tour AREVA, 1 Place Jean Millier, 92084 Paris La Défense, France
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