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Newman-Portela AM, Krawczyk-Bärsch E, Lopez-Fernandez M, Bok F, Kassahun A, Drobot B, Steudtner R, Stumpf T, Raff J, Merroun ML. Biostimulation of indigenous microbes for uranium bioremediation in former U mine water: multidisciplinary approach assessment. Environ Sci Pollut Res Int 2024; 31:7227-7245. [PMID: 38157180 PMCID: PMC10821841 DOI: 10.1007/s11356-023-31530-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 12/09/2023] [Indexed: 01/03/2024]
Abstract
Characterizing uranium (U) mine water is necessary to understand and design an effective bioremediation strategy. In this study, water samples from two former U-mines in East Germany were analysed. The U and sulphate (SO42-) concentrations of Schlema-Alberoda mine water (U: 1 mg/L; SO42-: 335 mg/L) were 2 and 3 order of magnitude higher than those of the Pöhla sample (U: 0.01 mg/L; SO42-: 0.5 mg/L). U and SO42- seemed to influence the microbial diversity of the two water samples. Microbial diversity analysis identified U(VI)-reducing bacteria (e.g. Desulfurivibrio) and wood-degrading fungi (e.g. Cadophora) providing as electron donors for the growth of U-reducers. U-bioreduction experiments were performed to screen electron donors (glycerol, vanillic acid, and gluconic acid) for Schlema-Alberoda U-mine water bioremediation purpose. Thermodynamic speciation calculations show that under experimental conditions, U(VI) is not coordinated to the amended electron donors. Glycerol was the best-studied electron donor as it effectively removed 99% of soluble U, 95% of Fe, and 58% of SO42- from the mine water, probably by biostimulation of indigenous microbes. Vanillic acid removed 90% of U, and no U removal occurred using gluconic acid.
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Affiliation(s)
- Antonio M Newman-Portela
- Department of Microbiology, Faculty of Science, University of Granada, Avda. Fuentenueva S/N, 18071, Granada, Spain.
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Evelyn Krawczyk-Bärsch
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Margarita Lopez-Fernandez
- Department of Microbiology, Faculty of Science, University of Granada, Avda. Fuentenueva S/N, 18071, Granada, Spain
| | - Frank Bok
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Andrea Kassahun
- WISMUT GmbH, Jagdschänkenstraße 29, 09117, Chemnitz, Germany
| | - Björn Drobot
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Robin Steudtner
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Thorsten Stumpf
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Johannes Raff
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Mohamed L Merroun
- Department of Microbiology, Faculty of Science, University of Granada, Avda. Fuentenueva S/N, 18071, Granada, Spain
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Han SC, Chang E, Zechel S, Bok F, Zavarin M. Application of community data to surface complexation modeling framework development: Iron oxide protolysis. J Colloid Interface Sci 2023; 648:1015-1024. [PMID: 37343488 DOI: 10.1016/j.jcis.2023.06.054] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/16/2023] [Accepted: 06/09/2023] [Indexed: 06/23/2023]
Abstract
This study presents a comprehensive community data-driven surface complexation modeling framework for simulating potentiometric titration of mineral surfaces. Compiled community data for ferrihydrite, goethite, hematite, and magnetite are fit to produce representative protolysis constants that can reproduce potentiometric titration data collected from multiple literature sources. Using this framework, the impact of surface complexation model type and surface site density (SSD) on the fit quality and protolysis constants can be readily evaluated. For example, the non-electrostatic model yielded a poor data fit compared to diffuse double layer model and constant capacitance models due to the absence of known surface charge effects. Regardless of the choice of iron oxide mineral, pKa1 decreased with increasing SSD while the opposite tendency was observed for pKa2. This newly developed framework demonstrates a method to reconcile community data-wide potentiometric titration data using Findable, Accessible, Interoperable, Reusable data principles to produce mineral protolysis constants that improve robustness of surface complexation models for applications in metal sorption and reactive transport modeling. The framework is readily expandable (as community data increase) and extensible (as the number of minerals increase). The framework provides a path forward for developing self-consistent, comprehensive, and updateable surface complexation databases for surface complexation and reactive transport modeling.
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Affiliation(s)
- Sol-Chan Han
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, United States
| | - Elliot Chang
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, United States
| | - Susanne Zechel
- Institute of Resource Ecology, Actinide Thermodynamics Department (FWOA), Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Frank Bok
- Institute of Resource Ecology, Actinide Thermodynamics Department (FWOA), Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Mavrik Zavarin
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, United States.
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Hilpmann S, Rossberg A, Steudtner R, Drobot B, Hübner R, Bok F, Prieur D, Bauters S, Kvashnina KO, Stumpf T, Cherkouk A. Presence of uranium(V) during uranium(VI) reduction by Desulfosporosinus hippei DSM 8344 T. Sci Total Environ 2023; 875:162593. [PMID: 36889400 DOI: 10.1016/j.scitotenv.2023.162593] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/27/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Microbial U(VI) reduction influences uranium mobility in contaminated subsurface environments and can affect the disposal of high-level radioactive waste by transforming the water-soluble U(VI) to less mobile U(IV). The reduction of U(VI) by the sulfate-reducing bacterium Desulfosporosinus hippei DSM 8344T, a close phylogenetic relative to naturally occurring microorganism present in clay rock and bentonite, was investigated. D. hippei DSM 8344T showed a relatively fast removal of uranium from the supernatants in artificial Opalinus Clay pore water, but no removal in 30 mM bicarbonate solution. Combined speciation calculations and luminescence spectroscopic investigations showed the dependence of U(VI) reduction on the initial U(VI) species. Scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy showed uranium-containing aggregates on the cell surface and some membrane vesicles. By combining different spectroscopic techniques, including UV/Vis spectroscopy, as well as uranium M4-edge X-ray absorption near-edge structure recorded in high-energy-resolution fluorescence-detection mode and extended X-ray absorption fine structure analysis, the partial reduction of U(VI) could be verified, whereby the formed U(IV) product has an unknown structure. Furthermore, the U M4 HERFD-XANES showed the presence of U(V) during the process. These findings offer new insights into U(VI) reduction by sulfate-reducing bacteria and contribute to a comprehensive safety concept for a repository for high-level radioactive waste.
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Affiliation(s)
- Stephan Hilpmann
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - André Rossberg
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany; Rossendorf Beamline (BM20-ROBL), European Synchrotron Radiation Facility, Grenoble, France
| | - Robin Steudtner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Björn Drobot
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - René Hübner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Dresden, Germany
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Damien Prieur
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany; Rossendorf Beamline (BM20-ROBL), European Synchrotron Radiation Facility, Grenoble, France
| | - Stephen Bauters
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany; Rossendorf Beamline (BM20-ROBL), European Synchrotron Radiation Facility, Grenoble, France
| | - Kristina O Kvashnina
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany; Rossendorf Beamline (BM20-ROBL), European Synchrotron Radiation Facility, Grenoble, France
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Andrea Cherkouk
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
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Zavarin M, Chang E, Wainwright H, Parham N, Kaukuntla R, Zouabe J, Deinhart A, Genetti V, Shipman S, Bok F, Brendler V. Community Data Mining Approach for Surface Complexation Database Development. Environ Sci Technol 2022; 56:2827-2838. [PMID: 35104413 DOI: 10.1021/acs.est.1c07109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This paper presents a comprehensive data-to-model workflow, including a findable, accessible, interoperable, reusable (FAIR) community sorption database (newly developed LLNL Surface Complexation/Ion Exchange (L-SCIE) database) along with a data fitting workflow to efficiently optimize surface complexation reaction constants with multiple surface complexation model (SCM) constructs. This workflow serves as a universal framework to mine, compile, and analyze large numbers of published sorption data as well as to estimate reaction constants for parameterizing reactive transport models. The framework includes (1) data digitization from published papers, (2) data unification including unit conversions, and (3) data-model integration and reaction constant estimation using geochemical software PHREEQC coupled with the universal parameter estimation code PEST. We demonstrate our approach using an analysis of U(VI) sorption to quartz based on a first L-SCIE implementation, concluding that a multisite SCM construct with carbonate surface species yielded the best fit to community data. Surface complexation reaction constants extracted from this approach captured all available sorption data available in the literature and provided insight into previously published reaction constants and surface complexation model constructs. The L-SCIE sorption database presented herein allows for automating this approach across a wide range of metals and minerals and implementing novel machine learning approaches to reactive transport in the future.
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Affiliation(s)
- Mavrik Zavarin
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Elliot Chang
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Haruko Wainwright
- Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, 1 Cyclotron Road, Berkeley, California 94720, United States
- Department of Nuclear Engineering, U.C. Berkeley, 4153 Etcheverry Hall #1730, Berkeley, California 94720, United States
| | - Nicholas Parham
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Rahul Kaukuntla
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Jadallah Zouabe
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
- Department of Chemical Engineering, U.C. Berkeley, 201 Gilman Hall, Berkeley, California 94720, United States
| | - Amanda Deinhart
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Victoria Genetti
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Sam Shipman
- Seaborg Institute, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, United States
| | - Frank Bok
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Vinzenz Brendler
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
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Stockmann M, Fritsch K, Bok F, Fernandes MM, Baeyens B, Steudtner R, Müller K, Nebelung C, Brendler V, Stumpf T, Schmeide K. New insights into U(VI) sorption onto montmorillonite from batch sorption and spectroscopic studies at increased ionic strength. Sci Total Environ 2022; 806:150653. [PMID: 34597569 DOI: 10.1016/j.scitotenv.2021.150653] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/06/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
The influence of ionic strength up to 3 mol kg-1 (background electrolytes NaCl or CaCl2) on U(VI) sorption onto montmorillonite was investigated as function of pHc in absence and presence of CO2. A multi-method approach combined batch sorption experiments with spectroscopic methods (time-resolved laser-induced fluorescence spectroscopy (TRLFS) and in situ attenuated total reflection Fourier-transform infrared spectroscopy (ATR FT-IR)). In the absence of atmospheric carbonate, U(VI) sorption was nearly 99% above pHc 6 in both NaCl and CaCl2 and no significant effect of ionic strength was found. At lower pH, cation exchange was strongly reduced with increasing ionic strength. In the presence of carbonate, U(VI) sorption was reduced above pHc 7.5 in NaCl and pHc 6 in CaCl2 system due to formation of aqueous UO2(CO3)x(2-2x) and Ca2UO2(CO3)3 complexes, respectively, as verified by TRLFS. A significant ionic strength effect was observed due to the formation of Ca2UO2(CO3)3(aq), which strongly decreases U(VI) sorption with increasing ionic strength. The joint analysis of determined sorption data together with literature data (giving a total of 213 experimental data points) allowed to derive a consistent set of surface complexation reactions and constants based on the 2SPNE SC/CE approach, yielding log K°≡SSOUO2+ = 2.42 ± 0.04, log K°≡SSOUO2OH = -4.49 ± 0.7, and log K°≡SSOUO2(OH)32- = -20.5 ± 0.4. Ternary uranyl carbonate surface complexes were not required to describe the data. With this reduced set of surface complexes, an improved robust sorption model was obtained covering a broad variety of geochemical settings over wide ranges of ionic strengths and groundwater compositions, which subsequently was validated by an independent original dataset. This model improves the understanding of U(VI) retention by clay minerals and enables now predictive modeling of U(VI) sorption processes in complex clay rich natural environments.
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Affiliation(s)
- M Stockmann
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
| | - K Fritsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - F Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - M Marques Fernandes
- Paul Scherrer Institute, Laboratory for Waste Management, 5232 Villigen PSI, Switzerland
| | - B Baeyens
- Paul Scherrer Institute, Laboratory for Waste Management, 5232 Villigen PSI, Switzerland
| | - R Steudtner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - K Müller
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - C Nebelung
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - V Brendler
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - T Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - K Schmeide
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
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Krawczyk-Bärsch E, Scheinost AC, Rossberg A, Müller K, Bok F, Hallbeck L, Lehrich J, Schmeide K. Correction to: Uranium and neptunium retention mechanisms in Gallionella ferruginea/ferrihydrite systems for remediation purposes. Environ Sci Pollut Res Int 2021; 28:49325. [PMID: 34363581 PMCID: PMC8410732 DOI: 10.1007/s11356-021-15672-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- Evelyn Krawczyk-Bärsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany.
| | - Andreas C Scheinost
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
- The Rossendorf Beamline, ESRF, F-38043, Grenoble, France
| | - André Rossberg
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
- The Rossendorf Beamline, ESRF, F-38043, Grenoble, France
| | - Katharina Müller
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
| | - Lotta Hallbeck
- Microbial Analytics Sweden AB (MICANS), SE-43535, Mölnlycke, Sweden
| | - Jana Lehrich
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
| | - Katja Schmeide
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
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Schmeide K, Rossberg A, Bok F, Shams Aldin Azzam S, Weiss S, Scheinost AC. Technetium immobilization by chukanovite and its oxidative transformation products: Neural network analysis of EXAFS spectra. Sci Total Environ 2021; 770:145334. [PMID: 33736379 DOI: 10.1016/j.scitotenv.2021.145334] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/14/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
The uptake of the fission product technetium (Tc) by chukanovite, an FeII hydroxy carbonate mineral formed as a carbon steel corrosion product in anoxic and carbonate-rich environments, was studied under anoxic, alkaline to hyperalkaline conditions representative for nuclear waste repositories in deep geological formations with cement-based inner linings. The retention potential of chukanovite towards TcVII is high in the pH range 7.8 to 12.6, evidenced by high solid-water distribution coefficients, log Rd ~ 6, and independent of ionic strength (0.1 or 1 M NaCl). Using Tc K-edge X-ray absorption spectroscopy (XAS) two series of samples were investigated, Tc chukanovite sorption samples and coprecipitates, prepared with varying Tc loadings, pH values and contact times. From the resulting 37 XAS spectra, spectral endmembers and their dependence on chemical parameters were derived by self-organizing (Kohonen) maps (SOM), a neural network-based approach of machine learning. X-ray absorption near-edge structure (XANES) data confirmed the complete reduction of TcVII to TcIV by chukanovite under all experimental conditions. Consistent with mineralogical phases identified by X-ray diffraction (XRD), SOM analysis of the extended X-ray absorption fine-structure (EXAFS) spectra revealed the presence of three species in the sorption samples, the speciation predominately controlled by pH: Between pH 7.8 and 11.8, TcO2-dimers form inner-sphere sorption complexes at the surface of the initial chukanovite as well as on the surface of secondary magnetite formed due to redox reaction. At pH ≥ 11.9, TcIV is incorporated in a mixed, chukanovite-like, Fe/Tc hydroxy carbonate precipitate. The same species formed when using the coprecipitation approach. Reoxidation of sorption samples resulted in a small remobilization of Tc, demonstrating that both the original chukanovite mineral and its oxidative transformation products, magnetite and goethite, contribute to the immobilization of Tc in the long term, thus strongly attenuating its environmental transport.
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Affiliation(s)
- Katja Schmeide
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - André Rossberg
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany; The Rossendorf Beamline at ESRF - The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
| | - Frank Bok
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Salim Shams Aldin Azzam
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Stephan Weiss
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Andreas C Scheinost
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany; The Rossendorf Beamline at ESRF - The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France.
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Jessat J, Sachs S, Moll H, John W, Steudtner R, Hübner R, Bok F, Stumpf T. Bioassociation of U(VI) and Eu(III) by Plant ( Brassica napus) Suspension Cell Cultures-A Spectroscopic Investigation. Environ Sci Technol 2021; 55:6718-6728. [PMID: 33929840 DOI: 10.1021/acs.est.0c05881] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this study, we investigated the interaction of U(VI) and Eu(III) with Brassica napus suspension plant cells as a model system. Concentration-dependent (0-200 μM) bioassociation experiments showed that more than 75% of U(VI) and Eu(III) were immobilized by the cells. In addition to this phenomenon, time-dependent studies for 1 to 72 h of exposure showed a multistage bioassociation process for cells that were exposed to 200 μM U(VI), where, after initial immobilization of U(VI) within 1 h of exposure, it was released back into the culture medium starting within 24 h. A remobilization to this extent has not been previously observed. The MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay was used to correlate the bioassociation behavior of Eu and U with the cell vitality. Speciation studies by spectroscopy and in silico methods highlighted various U and Eu species over the course of exposure. We were able to observe a new U species, which emerged simultaneously with the remobilization of U back into the solution, which we assume to be a U(VI) phosphate species. Thus, the interaction of U(VI) and Eu(III) with released plant metabolites could be concluded.
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Affiliation(s)
- Jenny Jessat
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Susanne Sachs
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Henry Moll
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Warren John
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Robin Steudtner
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - René Hübner
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Frank Bok
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Thorsten Stumpf
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
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Heller A, Pisarevskaja A, Bölicke N, Barkleit A, Bok F, Wober J. The effect of four lanthanides onto a rat kidney cell line (NRK-52E) is dependent on the composition of the cell culture medium. Toxicology 2021; 456:152771. [PMID: 33831499 DOI: 10.1016/j.tox.2021.152771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/01/2021] [Accepted: 03/31/2021] [Indexed: 11/26/2022]
Abstract
Lanthanide (Ln) exposure poses a serious health risk to animals and humans. In this study, we investigated the effect of 10-9-10-3 M La, Ce, Eu, and Yb exposure onto the viability of rat renal NRK-52E cells in dependence on Ln concentration, exposure time, and composition of the cell culture medium. Especially, the influence of fetal bovine serum (FBS) and citrate onto Ln cytotoxicity, solubility, and speciation was investigated. For this, in vitro cell viability studies using the XTT assay and fluorescence microscopic investigations were combined with solubility and speciation studies using TRLFS and ICP-MS, respectively. The theoretical Ln speciation was predicted using thermodynamic modeling. All Ln exhibit a concentration- and time-dependent effect on NRK-52E cells. FBS is the key parameter influencing both Ln solubility and cytotoxicity. We demonstrate that FBS is able to bind Ln3+ ions, thus, promoting solubility and reducing cytotoxicity after Ln exposure for 24 and 48 h. In contrast, citrate addition to the cell culture medium has no significant effect on Ln solubility and speciation nor cytotoxicity after Ln exposure for 24 and 48 h. However, a striking increase of cell viability is observable after Ln exposure for 8 h. Out of the four Ln elements under investigation, Ce is the most effective. Results from TRLFS and solubility measurements correlate well to those from in vitro cell culture experiments. In contrast, results from thermodynamic modeling do not correlate to TRLFS results, hence, demonstrating that big gaps in the database render this method, currently, inapplicable for the prediction of Ln speciation in cell culture media. Finally, this study demonstrates the importance and the synergistic effects of combining chemical and spectroscopic methods with cell culture techniques and biological methods.
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Affiliation(s)
- Anne Heller
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Chair of Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217, Dresden, Germany.
| | - Alina Pisarevskaja
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Chair of Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217, Dresden, Germany.
| | - Nora Bölicke
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Chair of Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217, Dresden, Germany.
| | - Astrid Barkleit
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Jannette Wober
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Chair of Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217, Dresden, Germany.
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10
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Krawczyk-Bärsch E, Scheinost AC, Rossberg A, Müller K, Bok F, Hallbeck L, Lehrich J, Schmeide K. Uranium and neptunium retention mechanisms in Gallionella ferruginea/ferrihydrite systems for remediation purposes. Environ Sci Pollut Res Int 2021; 28:18342-18353. [PMID: 32557040 PMCID: PMC8338803 DOI: 10.1007/s11356-020-09563-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
The ubiquitous β-Proteobacterium Gallionella ferruginea is known as stalk-forming, microaerophilic iron(II) oxidizer, which rapidly produces iron oxyhydroxide precipitates. Uranium and neptunium sorption on the resulting intermixes of G. ferruginea cells, stalks, extracellular exudates, and precipitated iron oxyhydroxides (BIOS) was compared to sorption to abiotically formed iron oxides and oxyhydroxides. The results show a high sorption capacity of BIOS towards radionuclides at circumneutral pH values with an apparent bulk distribution coefficient (Kd) of 1.23 × 104 L kg-1 for uranium and 3.07 × 105 L kg-1 for neptunium. The spectroscopic approach by X-ray absorption spectroscopy (XAS) and ATR FT-IR spectroscopy, which was applied on BIOS samples, showed the formation of inner-sphere complexes. The structural data obtained at the uranium LIII-edge and the neptunium LIII-edge indicate the formation of bidentate edge-sharing surface complexes, which are known as the main sorption species on abiotic ferrihydrite. Since the rate of iron precipitation in G. ferruginea-dominated systems is 60 times faster than in abiotic systems, more ferrihydrite will be available for immobilization processes of heavy metals and radionuclides in contaminated environments and even in the far-field of high-level nuclear waste repositories.
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Affiliation(s)
- Evelyn Krawczyk-Bärsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany.
| | - Andreas C Scheinost
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
- The Rossendorf Beamline, ESRF, F-38043, Grenoble, France
| | - André Rossberg
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
- The Rossendorf Beamline, ESRF, F-38043, Grenoble, France
| | - Katharina Müller
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
| | - Lotta Hallbeck
- Microbial Analytics Sweden AB (MICANS), SE-43535, Mölnlycke, Sweden
| | - Jana Lehrich
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
| | - Katja Schmeide
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328, Dresden, Germany
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11
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Rajabi F, Jessat J, Garimella JN, Bok F, Steudtner R, Stumpf T, Sachs S. Uranium(VI) toxicity in tobacco BY-2 cell suspension culture - A physiological study. Ecotoxicol Environ Saf 2021; 211:111883. [PMID: 33454591 DOI: 10.1016/j.ecoenv.2020.111883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/14/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
For the first time, the physiological and cellular responses of Nicotiana tabacum (BY-2) cells to uranium (U) as an abiotic stressor were studied using a multi-analytic approach that combined biochemical analysis, thermodynamic modeling and spectroscopic studies. The goal of this investigation was to determine the U threshold toxicity in tobacco BY-2 cells, the influence of U on the homeostasis of micro-macro essential nutrients, as well as the effect of Fe starvation on U bioassociation in cultured BY-2 cells. Our findings demonstrated that U interferes with the homeostasis of essential elements. The interaction of U with BY-2 cells confirmed both time- and concentration-dependent kinetics. Under Fe deficiency, a reduced level of U was detected in the cells compared to Fe-sufficient conditions. Interestingly, blocking the Ca channels with gadolinium chloride caused a decrease in U concentration in the BY-2 cells. Spectroscopic studies evidenced changes in the U speciation in the culture media with increasing exposure time under both Fe-sufficient and deficient conditions, leading us to conclude that different stress response reactions are related to Fe metabolism. Moreover, it is suggested that U toxicity in BY-2 cells is highly dependent on the existence of other micro-macro elements as shown by negative synergistic effects of U and Fe on cell viability.
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Affiliation(s)
- Fatemeh Rajabi
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Jenny Jessat
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Jawaharlal Nehru Garimella
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Robin Steudtner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Susanne Sachs
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
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12
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Neumann J, Brinkmann H, Britz S, Lützenkirchen J, Bok F, Stockmann M, Brendler V, Stumpf T, Schmidt M. A comprehensive study of the sorption mechanism and thermodynamics of f-element sorption onto K-feldspar. J Colloid Interface Sci 2020; 591:490-499. [PMID: 33279214 DOI: 10.1016/j.jcis.2020.11.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/22/2020] [Accepted: 11/09/2020] [Indexed: 10/23/2022]
Abstract
The mobility of heavy metal contaminants and radionuclides in the environment is directly controlled by their interactions with charged mineral surfaces, hence an assessment of their potential toxicity, e.g. in the context of radioactive waste disposal sites, requires understanding of sorption processes on the molecular level. Here, we investigate the sorption of a variety of rare earth elements (REE) and trivalent actinides (Am, Cm) on K-feldspar using batch sorption, time-resolved laser-induced fluorescence spectroscopy (TRLFS), and a surface complexation model. Initially, a reliable pKa for K-feldspar's surface deprotonation reaction was determined as 2.5 ± 0.02 by column titration experiments, in excellent agreement with a measured pHIEP of 2.8. Batch sorption experiments over a broad range of experimental conditions in terms of mineral grain size, pH, [M3+], ionic radius, solid/liquid ratio, ionic strength, and equilibration procedures were carried out to quantify macroscopic retention. The trivalent d-block element Y, early, mid, and late lanthanides (La, Eu, Nd, Lu), as well as two minor actinides (Am, Cm) were used for batch sorption experiments and showed similar pH dependent uptake behavior, underlining their chemical analogy. In parallel, spectroscopic investigations provided insight into surface speciation. Cm TRLFS spectra indicate the formation of three inner-sphere sorption complexes with increasing hydrolysis. Additionally, a ternary K-feldspar/Cm/silicate complex was found for pH > 10, and batch and spectroscopic data at low pH (<4) point to small amounts of outer sphere sorption complexes. Based on TRLFS data, batch sorption, and titration data, a generic geochemical sorption model was developed, that describes sorption edges for all investigated M3+/K-feldspar systems satisfactorily. The derived stability constants for the binary sorption complexes (logK1-4 = -3.6, -7.7, -11.5, and -17.4, respectively) could successfully be used to reproduce literature data. The stability constants obtained for the surface complexes were included into the database for the Smart Kd-concept, which will further improve the safety assessment of potential repositories for radioactive waste.
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Affiliation(s)
- J Neumann
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - H Brinkmann
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - S Britz
- Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Theodor-Heuss-Straße 4, 38122 Braunschweig, Germany.
| | - J Lützenkirchen
- Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
| | - F Bok
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - M Stockmann
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - V Brendler
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - T Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - M Schmidt
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany.
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13
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Demnitz M, Hilpmann S, Lösch H, Bok F, Steudtner R, Patzschke M, Stumpf T, Huittinen N. Temperature-dependent luminescence spectroscopic investigations of uranyl(vi) complexation with the halides F− and Cl−. Dalton Trans 2020; 49:7109-7122. [DOI: 10.1039/d0dt00646g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uranyl(vi) complexation with fluoride and chloride was investigated with luminescence spectroscopy, and the strong quenching by chloride was overcome by freezing.
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Affiliation(s)
- M. Demnitz
- Helmholtz-Zentrum Dresden-Rossendorf e.V
- Institute of Resource Ecology
- 01328 Dresden
- Germany
| | - S. Hilpmann
- Helmholtz-Zentrum Dresden-Rossendorf e.V
- Institute of Resource Ecology
- 01328 Dresden
- Germany
| | - H. Lösch
- Helmholtz-Zentrum Dresden-Rossendorf e.V
- Institute of Resource Ecology
- 01328 Dresden
- Germany
| | - F. Bok
- Helmholtz-Zentrum Dresden-Rossendorf e.V
- Institute of Resource Ecology
- 01328 Dresden
- Germany
| | - R. Steudtner
- Helmholtz-Zentrum Dresden-Rossendorf e.V
- Institute of Resource Ecology
- 01328 Dresden
- Germany
| | - M. Patzschke
- Helmholtz-Zentrum Dresden-Rossendorf e.V
- Institute of Resource Ecology
- 01328 Dresden
- Germany
| | - T. Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf e.V
- Institute of Resource Ecology
- 01328 Dresden
- Germany
| | - N. Huittinen
- Helmholtz-Zentrum Dresden-Rossendorf e.V
- Institute of Resource Ecology
- 01328 Dresden
- Germany
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14
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Lehmann S, Foerstendorf H, Zimmermann T, Patzschke M, Bok F, Brendler V, Stumpf T, Steudtner R. Thermodynamic and structural aspects of the aqueous uranium(iv) system - hydrolysis vs. sulfate complexation. Dalton Trans 2019; 48:17898-17907. [PMID: 31782448 DOI: 10.1039/c9dt02886b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aquatic species of U(iv) in acidic aqueous solution in the presence of sulfate were studied in the micromolar range by a combined approach of optical spectroscopy (UV/vis and mid-IR), quantum-chemical calculations (QCC), and thermodynamic modelling. The number of species occurring in solution within the pH range 0-2 was assessed by decomposition and fitting of photometric spectra using HypSpec and Geochemist's Workbench software. Single component spectra of U4+, UOH3+, USO42+ and U(SO4)2 were obtained and extinction coefficients ελ were calculated to be 61.7, 19.2, 47.6 and 40.3 L mol-1 cm-1, respectively. Complex formation constants of two U(iv) sulfate species and the first hydrolysis species UOH3+ in infinitely diluted solution were determined by thermodynamic modelling to be log β = 6.9 ± 0.3, log β = 11.8 ± 0.5 and log β = -(0.36 ± 0.1), respectively. No further U(iv) sulfate and hydrolysis species were observed under the prevailing conditions. Molecular structural information of the sulfate species was derived from vibrational spectra and QCC exhibiting a predominant monodentate coordination of the sulfate ions.
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Affiliation(s)
- Susanne Lehmann
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
| | - Harald Foerstendorf
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
| | - Thomas Zimmermann
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany. and Dresden University of Applied Sciences, Fakultät Landbau/Umwelt/Chemie, Pillnitzer Platz 2, 01326 Dresden, Germany
| | - Michael Patzschke
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
| | - Vinzenz Brendler
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
| | - Robin Steudtner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, 01328 Dresden, Germany.
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15
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Heller A, Barkleit A, Bok F, Wober J. Effect of four lanthanides onto the viability of two mammalian kidney cell lines. Ecotoxicol Environ Saf 2019; 173:469-481. [PMID: 30802736 DOI: 10.1016/j.ecoenv.2019.02.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 01/28/2019] [Accepted: 02/03/2019] [Indexed: 06/09/2023]
Abstract
Exposure to lanthanides (Ln) poses a serious health risk to animals and humans. Since Ln are mainly excreted with urine, we investigated the effect of La, Ce, Eu, and Yb exposure on renal rat NRK-52E and human HEK-293 cells for 8, 24, and 48 h in vitro. Cell viability studies using the XTT assay and microscopic investigations were combined with solubility and speciation studies using ICP-MS and TRLFS. Thermodynamic modeling was applied to predict the speciation of Ln in the cell culture medium. All Ln show a concentration- and time-dependent effect on both cell lines with Ce being the most potent element. In cell culture medium, the Ln are completely soluble and most probably complexed with proteins from fetal bovine serum. The results of this study underline the importance of combining biological, chemical, and spectroscopic methods in studying the effect of Ln on cells in vitro and may contribute to the improvement of the current risk assessment for Ln in the human body. Furthermore, they demonstrate that Ln seem to have no effect on renal cells in vitro at environmental trace concentrations. Nevertheless, especially Ce has the potential for harmful effects at elevated concentrations observed in mining and industrial areas.
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Affiliation(s)
- Anne Heller
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217 Dresden, Germany.
| | - Astrid Barkleit
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - Jannette Wober
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217 Dresden, Germany.
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16
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Wolter JM, Schmeide K, Weiss S, Bok F, Brendler V, Stumpf T. Stability of U(VI) doped calcium silicate hydrate gel in repository-relevant brines studied by leaching experiments and spectroscopy. Chemosphere 2019; 218:241-251. [PMID: 30471505 DOI: 10.1016/j.chemosphere.2018.11.074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 10/30/2018] [Accepted: 11/11/2018] [Indexed: 06/09/2023]
Abstract
The stability of calcium silicate hydrate (C-S-H) gel doped with uranium to form calcium uranium silicate hydrate (C-U-S-H) gel was investigated in 2.5 M NaCl, 2.5 M NaCl/0.02 M Na2SO4, 2.5 M NaCl/0.02 M NaHCO3 or 0.02 M NaHCO3 solutions relevant to the geological disposal of radioactive waste. The C-U-S-H gel samples were synthesized by direct U(VI) incorporation and characterized with time-resolved laser-induced luminescence spectroscopy (TRLFS), infrared (IR) spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). Time-dependent pH changes as well as the Ca, Si and U release from C-U-S-H gels into the brines, determined by inductively coupled plasma mass spectrometry (ICP-MS), were monitored for three calcium-to-silicon (C/S) ratios (0.99, 1.55 and 2.02) over 32 d. Subsequently, changes of the U(VI) speciation and C-S-H mineralogy caused by leaching were investigated with TRLFS, IR spectroscopy and XRD. Results indicated that composition and pH value of the leaching solution, the presence of portlandite as well as formation and solubility of calcite as secondary phase determine the U(VI) retention by C-S-H gel under high saline and alkaline conditions. At high ionic strengths, the Ca release from C-S-H and secondary phases like calcite is increased. Under hyperalkaline conditions only small amounts of U(VI) were released during leaching. A decrease of the pH due to the additional presence of carbonate was linked with an increased U(VI) release from C-S-H gel leading to the formation of aqueous calcium uranyl carbonate in the supernatant solution.
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Affiliation(s)
- Jan-Martin Wolter
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Katja Schmeide
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Stephan Weiss
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Frank Bok
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Vinzenz Brendler
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
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17
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Sachs S, Geipel G, Bok F, Oertel J, Fahmy K. Calorimetrically Determined U(VI) Toxicity in Brassica napus Correlates with Oxidoreductase Activity and U(VI) Speciation. Environ Sci Technol 2017; 51:10843-10849. [PMID: 28841015 DOI: 10.1021/acs.est.7b02564] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Radioecological studies depend on the quantitative toxicity assessment of environmental radionuclides. At low dose exposure, the life span of affected organisms is barely shortened, enabling the transfer of radionuclides through an almost-intact food chain. Lethality-based toxicity estimates are not adequate in this regime because they require higher concentrations. However, increased radionuclide concentration alters its speciation, rendering the extrapolation to the low dose exposure chemically inconsistent. Here, we demonstrate that microcalorimetry provides a sensitive real-time monitor of toxicity of uranium (in the U(VI) oxidation state) in a plant cell model of Brassica napus. We introduce the calorimetric descriptor "metabolic capacity" and show that it correlates with enzymatically determined cell viability. It is independent of physiological models and robust against the naturally occurring fluctuations in the metabolic response to U(VI) of plant cell cultures. In combination with time-resolved laser-induced fluorescence spectroscopy and thermodynamic modeling, we show that the plant cell metabolism is affected predominantly by hydroxo-species of U(VI) with an IC50 threshold of ∼90 μM. The data emphasize the yet-little-exploited potential of microcalorimetry for the speciation-sensitive ecotoxicology of radionuclides.
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Affiliation(s)
- Susanne Sachs
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology , Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Gerhard Geipel
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology , Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Frank Bok
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology , Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Jana Oertel
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology , Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Karim Fahmy
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology , Bautzner Landstraße 400, 01328 Dresden, Germany
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Moll H, Cherkouk A, Bok F, Bernhard G. Plutonium interaction studies with the Mont Terri Opalinus Clay isolate Sporomusa sp. MT-2.99: changes in the plutonium speciation by solvent extractions. Environ Sci Pollut Res Int 2017; 24:13497-13508. [PMID: 28390020 DOI: 10.1007/s11356-017-8969-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 03/30/2017] [Indexed: 06/07/2023]
Abstract
Since plutonium could be released from nuclear waste disposal sites, the exploration of the complex interaction processes between plutonium and bacteria is necessary for an improved understanding of the fate of plutonium in the vicinity of such a nuclear waste disposal site. In this basic study, the interaction of plutonium with cells of the bacterium, Sporomusa sp. MT-2.99, isolated from Mont Terri Opalinus Clay, was investigated anaerobically (in 0.1 M NaClO4) with or without adding Na-pyruvate as an electron donor. The cells displayed a strong pH-dependent affinity for Pu. In the absence of Na-pyruvate, a strong enrichment of stable Pu(V) in the supernatants was discovered, whereas Pu(IV) polymers dominated the Pu oxidation state distribution on the biomass at pH 6.1. A pH-dependent enrichment of the lower Pu oxidation states (e.g., Pu(III) at pH 6.1 which is considered to be more mobile than Pu(IV) formed at pH 4) was observed in the presence of up to 10 mM Na-pyruvate. In all cases, the presence of bacterial cells enhanced removal of Pu from solution and accelerated Pu interaction reactions, e.g., biosorption and bioreduction.
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Affiliation(s)
- Henry Moll
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstrasse 400, 01328, Dresden, Germany.
| | - Andrea Cherkouk
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - Gert Bernhard
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstrasse 400, 01328, Dresden, Germany
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Virtanen S, Bok F, Ikeda-Ohno A, Rossberg A, Lützenkirchen J, Rabung T, Lehto J, Huittinen N. The specific sorption of Np(V) on the corundum (α-Al2O3) surface in the presence of trivalent lanthanides Eu(III) and Gd(III): A batch sorption and XAS study. J Colloid Interface Sci 2016; 483:334-342. [DOI: 10.1016/j.jcis.2016.08.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 08/04/2016] [Accepted: 08/12/2016] [Indexed: 10/21/2022]
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Scheinost AC, Steudtner R, Hübner R, Weiss S, Bok F. Neptunium V Retention by Siderite under Anoxic Conditions: Precipitation of NpO 2-Like Nanoparticles and of Np IV Pentacarbonate. Environ Sci Technol 2016; 50:10413-10420. [PMID: 27585550 DOI: 10.1021/acs.est.6b02399] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The NpV retention by siderite, an FeII carbonate mineral with relevance for the near-field of high-level radioactive waste repositories, was investigated under anoxic conditions. Batch sorption experiments show that siderite has a high affinity for aqueous NpVO2+ across pH 7 to 13 as expressed by solid-water distribution coefficients, log Rd, > 5, similar to the log Rd determined for the (solely) tetravalent actinide Th on calcite, suggesting reduction of NpV to NpIV by siderite. Np L3-edge X-ray absorption near edge (XANES) spectroscopy conducted in a pH range typical for siderite-containing host rocks (7-8), confirmed the tetravalent Np oxidation state. Extended X-ray absorption fine-structure (EXAFS) spectroscopy revealed a local structure in line with NpO2-like nanoparticles with diameter < 1 nm, a result further corroborated by high-resolution transmission electron microscopy (HRTEM). The low solubility of these NpO2-like nanoparticles (∼10-9 M), along with their negligible surface charge at neutral pH conditions which favors particle aggregation, suggest an efficient retention of Np in the near-field of radioactive waste repositories. When NpV was added to ferrous carbonate solution, the subsequent precipitation of siderite did not lead to a structural incorporation of NpIV by siderite, but caused precipitation of a NpIV pentacarbonate phase.
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Affiliation(s)
- Andreas C Scheinost
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden - Rossendorf, D-01314, Germany
- The Rossendorf Beamline at ESRF, F-38043 Grenoble, France
| | - Robin Steudtner
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden - Rossendorf, D-01314, Germany
| | - René Hübner
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden - Rossendorf, D-01314, Germany
| | - Stephan Weiss
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden - Rossendorf, D-01314, Germany
| | - Frank Bok
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden - Rossendorf, D-01314, Germany
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Drobot B, Bauer A, Steudtner R, Tsushima S, Bok F, Patzschke M, Raff J, Brendler V. Speciation Studies of Metals in Trace Concentrations: The Mononuclear Uranyl(VI) Hydroxo Complexes. Anal Chem 2016; 88:3548-55. [DOI: 10.1021/acs.analchem.5b03958] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Björn Drobot
- Institute of Resource Ecology, and ‡Helmholtz Institute
Freiberg for Resource
Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328 Saxony, Germany
| | - Anne Bauer
- Institute of Resource Ecology, and ‡Helmholtz Institute
Freiberg for Resource
Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328 Saxony, Germany
| | - Robin Steudtner
- Institute of Resource Ecology, and ‡Helmholtz Institute
Freiberg for Resource
Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328 Saxony, Germany
| | - Satoru Tsushima
- Institute of Resource Ecology, and ‡Helmholtz Institute
Freiberg for Resource
Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328 Saxony, Germany
| | - Frank Bok
- Institute of Resource Ecology, and ‡Helmholtz Institute
Freiberg for Resource
Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328 Saxony, Germany
| | - Michael Patzschke
- Institute of Resource Ecology, and ‡Helmholtz Institute
Freiberg for Resource
Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328 Saxony, Germany
| | - Johannes Raff
- Institute of Resource Ecology, and ‡Helmholtz Institute
Freiberg for Resource
Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328 Saxony, Germany
| | - Vinzenz Brendler
- Institute of Resource Ecology, and ‡Helmholtz Institute
Freiberg for Resource
Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328 Saxony, Germany
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Sachs S, Heller A, Weiss S, Bok F, Bernhard G. Interaction of Eu(III) with mammalian cells: Cytotoxicity, uptake, and speciation as a function of Eu(III) concentration and nutrient composition. Toxicol In Vitro 2015; 29:1555-68. [DOI: 10.1016/j.tiv.2015.06.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 05/29/2015] [Accepted: 06/05/2015] [Indexed: 11/30/2022]
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Krawczyk-Bärsch E, Lütke L, Moll H, Bok F, Steudtner R, Rossberg A. A spectroscopic study on U(VI) biomineralization in cultivated Pseudomonas fluorescens biofilms isolated from granitic aquifers. Environ Sci Pollut Res Int 2015; 22:4555-4565. [PMID: 25318416 DOI: 10.1007/s11356-014-3671-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 09/29/2014] [Indexed: 06/04/2023]
Abstract
The interaction between the Pseudomonas fluorescens biofilm and U(VI) were studied using extended X-ray absorption fine structure spectroscopy (EXAFS), and time-resolved laser fluorescence spectroscopy (TRLFS). In EXAFS studies, the formation of a stable uranyl phosphate mineral, similar to autunite (Ca[UO2]2[PO4]2•2-6H2O) or meta-autunite (Ca[UO2]2[PO4]2•10-12H2O) was observed. This is the first time such a biomineralization process has been observed in P. fluorescens. Biomineralization occurs due to phosphate release from the cellular polyphosphate, likely as a cell's response to the added uranium. It differs significantly from the biosorption process occurring in the planktonic cells of the same strain. TRLFS studies of the uranium-contaminated nutrient medium identified aqueous Ca2UO2(CO3)3 and UO2(CO3)3 (4-) species, which in contrast to the biomineralization in the P. fluorescens biofilm, may contribute to the transport and migration of U(VI). The obtained results reveal that biofilms of P. fluorescens may play an important role in predicting the transport behavior of uranium in the environment. They will also contribute to the improvement of remediation methods in uranium-contaminated sites.
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Affiliation(s)
- Evelyn Krawczyk-Bärsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, P.O. Box 51 01 19, 01314, Dresden, Germany,
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Müller K, Gröschel A, Rossberg A, Bok F, Franzen C, Brendler V, Foerstendorf H. In situ spectroscopic identification of neptunium(V) inner-sphere complexes on the hematite-water interface. Environ Sci Technol 2015; 49:2560-2567. [PMID: 25597326 DOI: 10.1021/es5051925] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Hematite plays a decisive role in regulating the mobility of contaminants in rocks and soils. The Np(V) reactions at the hematite-water interface were comprehensively investigated by a combined approach of in situ vibrational spectroscopy, X-ray absorption spectroscopy and surface complexation modeling. A variety of sorption parameters such as Np(V) concentration, pH, ionic strength, and the presence of bicarbonate was considered. Time-resolved IR spectroscopic sorption experiments at the iron oxide-water interface evidenced the formation of a single monomer Np(V) inner-sphere sorption complex. EXAFS provided complementary information on bidentate edge-sharing coordination. In the presence of atmospherically derived bicarbonate the formation of the bis-carbonato inner-sphere complex was confirmed supporting previous EXAFS findings.1 The obtained molecular structure allows more reliable surface complexation modeling of recent and future macroscopic data. Such confident modeling is mandatory for evaluating water contamination and for predicting the fate and migration of radioactive contaminants in the subsurface environment as it might occur in the vicinity of a radioactive waste repository or a reprocessing plant.
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Affiliation(s)
- Katharina Müller
- Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology , Bautzner Landstr. 400, 01328 Dresden, Germany
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Schmidt H, Asztalos A, Bok F, Voigt W. New iron(III) nitrate hydrates: Fe(NO3)3·xH2O with x = 4, 5 and 6. Acta Crystallogr C 2012; 68:i29-33. [PMID: 22669180 DOI: 10.1107/s0108270112015855] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Accepted: 04/11/2012] [Indexed: 11/11/2022] Open
Abstract
Crystals of the title compounds were grown from their hydrous melts or solutions. The crystal structure of iron(III) trinitrate hexahydrate {hexaaquairon(III) trinitrate, [Fe(H(2)O)(6)](NO(3))(3)} is built up from [Fe(H(2)O)(6)](2+) octahedra and nitrate anions connected via hydrogen bonds. In iron(III) trinitrate pentahydrate {pentaaquanitratoiron(III) dinitrate, [Fe(NO(3))(H(2)O)(5)](NO(3))(2)}, one water molecule in the coordination octahedron of the Fe(III) atom is substituted by an O atom of a nitrate group. Iron(III) trinitrate tetrahydrate {triaquadinitratoiron(III) nitrate monohydrate, [Fe(NO(3))(2)(H(2)O)(3)]NO(3)·H(2)O} represents the first example of a simple iron(III) nitrate with pentagonal-bipyramidal coordination geometry, where two bidentate nitrate anions and one water molecule form a pentagonal plane.
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Affiliation(s)
- Horst Schmidt
- TU Bergakademie Freiberg, Institute of Inorganic Chemistry, Leipziger Strasse 29, D-09596 Freiberg, Germany.
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