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Böszörményi É, Dömötör O, Kutus B, Varga G, Peintler G, Sipos P. Coordination motifs of binary neodymium(III) D-gluconate, D-galactonate and L-gulonate complexes and the transition from inner- to outer-sphere coordination in neutral to strongly alkaline medium. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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DiBlasi NA, Tasi AG, Trumm M, Schnurr A, Gaona X, Fellhauer D, Dardenne K, Rothe J, Reed DT, Hixon AE, Altmaier M. Pu(iii) and Cm(iii) in the presence of EDTA: aqueous speciation, redox behavior, and the impact of Ca(ii). RSC Adv 2022; 12:9478-9493. [PMID: 35424870 PMCID: PMC8985188 DOI: 10.1039/d1ra09010k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 03/14/2022] [Indexed: 11/21/2022] Open
Abstract
The impact of calcium on the solubility, redox behavior, and speciation of the An(iii)–EDTA (An = Pu or Cm) system under reducing, anoxic conditions was investigated through batch solubility experiments, X-ray absorption spectroscopy (XAS), density functional theory (DFT), and time-resolved laser fluorescence spectroscopy (TRLFS). Batch solubility experiments were conducted from undersaturation using Pu(OH)3(am) as the solid phase in contact with 0.1 M NaCl–NaOH–HCl–EDTA–CaCl2 solutions at [EDTA] = 1 mM, pHm = 7.5–9.5, and [CaCl2] ≤20 mM. Additional samples targeted brine systems represented by 3.5 M CaCl2 and WIPP simulated brine. Solubility data in the absence of calcium were well-described by Pu(iii)–EDTA thermodynamic models, thus supporting the stabilization of Pu(iii)–EDTA complexes in solution. Cm(iii)–EDTA TRLFS data suggested the stepwise hydrolysis of An(iii)-EDTA complexes with increasing pH, and current Pu(iii)-EDTA solubility models were reassessed to evaluate the possibility of including Pu(iii)–OH–EDTA complexes and to calculate preliminary formation constants. Solubility data in the presence of calcium exhibited nearly constant log m(Pu)tot, as limited by total ligand concentration, with increasing [CaCl2]tot, which supports the formation of calcium-stabilized Pu(iii)–EDTA complexes in solution. XAS spectra without calcium showed partial oxidation of Pu(iii) to Pu(iv) in the aqueous phase, while calcium-containing experiments exhibited only Pu(iii), suggesting that Ca–Pu(iii)–EDTA complexes may stabilize Pu(iii) over short timeframes (t ≤45 days). DFT calculations on the Ca–Pu(iii)–EDTA system and TRLFS studies on the analogous Ca–Cm(iii)–EDTA system show that calcium likely stabilizes An(iii)–EDTA complexes but can also potentially stabilize An(iii)–OH–EDTA species in solution. This hints towards the possible existence of four major complex types within Ca–An(iii)–EDTA systems: An(iii)–EDTA, An(iii)–OH–EDTA, Ca–An(iii)–EDTA, and Ca–An(iii)–OH–EDTA. While the exact stoichiometry and degree of ligand protonation within these complexes remain undefined, their formation must be accounted for to properly assess the fate and transport of plutonium under conditions relevant to nuclear waste disposal. Combined advanced spectroscopy and solubility studies provide evidence for the formation of novel calcium-containing and hydrolyzed (Cm,Pu)(iii)–EDTA complex(es).![]()
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Affiliation(s)
- Nicole A DiBlasi
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame 301 Stinson-Remick, Notre Dame IN 46556 USA .,Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
| | - Agost G Tasi
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
| | - Michael Trumm
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
| | - Andreas Schnurr
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
| | - Xavier Gaona
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
| | - David Fellhauer
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
| | - Kathy Dardenne
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
| | - Jörg Rothe
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
| | - Donald T Reed
- Los Alamos National Laboratory 1400 University Dr. Carlsbad NM 88220 USA
| | - Amy E Hixon
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame 301 Stinson-Remick, Notre Dame IN 46556 USA
| | - Marcus Altmaier
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal P.O. Box 3640 Karlsruhe 76021 Germany
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Février L, Coppin F, Pierrisnard S, Bourdillon M, Nguyen LV, Zaiter N, Brandès S, Sladkov V, Chambron JC, Meyer M. Efficiency of dihydroxamic and trihydroxamic siderochelates to extract uranium and plutonium from contaminated soils. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2021; 235-236:106645. [PMID: 34020181 DOI: 10.1016/j.jenvrad.2021.106645] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/30/2021] [Accepted: 05/05/2021] [Indexed: 05/29/2023]
Abstract
Actinide-based mineral phases occurring in contaminated soils can be solubilized by organic chelators excreted by plants, such as citrate. Herein, the efficiency of citrate towards U and Pu extraction is compared to that of siderophores, whose primary function is the acquisition of iron(III) as an essential nutrient and growth factor for many soil microorganisms. To that end, we selected desferrioxamine B (DFB) as an emblematic bacterial trishydroxamic siderophore and a synthetic analog, abbreviated (LCy,Pr)H2, of the tetradentate rhodotorulic acid (RA) produced by yeasts. Firstly, the uranyl speciation with both ligands was assessed in the pH range 2-11 by potentiometry and visible absorption spectrophotometry. Equilibrium constants and absorption spectra for three [UO2(DFB)Hh](h-1)+ (h = 1-3) and five [UO2(LCy,Pr)lHh](2+h-2l)+ (-1 ≤ h ≤ 1 for l = 1 and h = 0-1 for l = 2) solution complexes were determined at 25.0 °C and I = 0.1 M KNO3. Similar studies for the Fe3+/(LCy,Pr)2- system revealed the formation of five species having [Fe(LCy,Pr)]+, [Fe(LCy,Pr)OH], [Fe(LCy,Pr)(OH)2]-, [Fe(LCy,Pr)2H], and [Fe2(LCy,Pr)3] compositions. Then, the ability of DFB, (LCy,Pr)H2, and citrate to solubilize either U or Pu from pitchblende-rich soils (soils 1 and 2) or freshly plutonium-contaminated soils (LBS and PG) was evaluated by performing batch extraction tests. U was extracted significantly only by citrate after a day. After one week, the amount of U complexed by citrate only slightly exceeded that measured for the siderochelates, following the order citrate > (LCy,Pr)H2 ≥ DFB ≈ H2O, and were comparatively very low. Pu was also more efficiently extracted by citrate than by DFB after a day, but only by a factor of ~2-3 for the PG soil, while the Pu concentration in the supernatant after one week was approximately the same for both natural chelators. It remained nearly constant for DFB between the 1st and 7th day, but drastically decreased in the case of citrate, suggesting chemical decomposition in the latter case. For the Fe-rich soils 1 and 2, the efficiencies of the three chelators to solubilize Fe after a day were of the same order of magnitude, decreasing in the order DFB > citrate > (LCy,Pr)H2. However, after a week DFB had extracted ~1.5 times more Fe, whereas the amount extracted by the other chelators stayed constant. For the less Fe-rich LBS and PG soils contaminated by Pu, the amounts of extracted Fe were higher, especially after 7 days, and the DFB outperformed citrate by a factor of nearly 3. The higher capacity of the hexadentate DFB to extract Pu in the presence of Fe and its lower ability to mobilize U qualitatively agree with the respective complexation constant ratios, keeping in mind that both Pu-containing soils had a lower iron loading. Noticeably, (LCy,Pr)H2 has roughly the same capacity as DFB to solubilize U, but it mobilizes less Fe than the hexadentate siderophore. Similarly, citrate has the highest capacity to extract Pu, but the lowest to extract Fe. Therefore, compared to DFB, (LCy,Pr)H2 shows a better U/Fe extraction selectivity and citrate shows a better Pu/Fe selectivity.
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Affiliation(s)
- Laureline Février
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LR2T, BP 3, 13115, Saint-Paul-Lez-Durance Cedex, France.
| | - Frédéric Coppin
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LR2T, BP 3, 13115, Saint-Paul-Lez-Durance Cedex, France
| | - Sylvie Pierrisnard
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LR2T, BP 3, 13115, Saint-Paul-Lez-Durance Cedex, France
| | - Mélanie Bourdillon
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université Bourgogne-Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078, Dijon Cedex, France
| | - Lé Vi Nguyen
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université Bourgogne-Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078, Dijon Cedex, France
| | - Nissrine Zaiter
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université Bourgogne-Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078, Dijon Cedex, France
| | - Stéphane Brandès
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université Bourgogne-Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078, Dijon Cedex, France
| | - Vladimir Sladkov
- Laboratoire de Physique des 2 Infinis Irène Joliot Curie (IJCLab), UMR 9012, CNRS/IN2P3 Université Paris-Saclay, Université de Paris, 15 rue Georges Clemenceau, 91405, Orsay, France
| | - Jean-Claude Chambron
- Institut de Chimie de Strasbourg, UMR 7177, CNRS, Université de Strasbourg, 1 rue Blaise Pascal, BP 296 R 8, 67008, Strasbourg Cedex, France
| | - Michel Meyer
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université Bourgogne-Franche-Comté, 9 avenue Alain Savary, BP 47870, 21078, Dijon Cedex, France.
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DiBlasi NA, Tasi AG, Gaona X, Fellhauer D, Dardenne K, Rothe J, Reed DT, Hixon AE, Altmaier M. Impact of Ca(II) on the aqueous speciation, redox behavior, and environmental mobility of Pu(IV) in the presence of EDTA. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 783:146993. [PMID: 33866175 DOI: 10.1016/j.scitotenv.2021.146993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/01/2021] [Accepted: 04/03/2021] [Indexed: 06/12/2023]
Abstract
The impact of calcium on the solubility and redox behavior of the Pu(IV)-EDTA system was investigated using a combination of undersaturation solubility studies and advanced spectroscopic techniques. Batch solubility experiments were conducted in 0.1 M NaCl-NaOH-HCl-EDTA-CaCl2 solutions at constant [EDTA] = 1∙10-3 M, 1 ≤ pHm ≤ 11, and 1∙10-3 M ≤ [CaCl2] ≤ 2∙10-2 M. Additional samples targeted brine systems represented by 3.5 M CaCl2 and WIPP simulated brine. Redox conditions were buffered with hydroquinone (pe + pH ≈ 9.5) with selected samples prepared in the absence of any redox buffer. All experiments were performed at T = 22 °C under Ar atmosphere. In-situ X-ray absorption spectroscopy indicated that PuO2(ncr,hyd) was the solubility-controlling phase during the lifetime of all experiments and that aqueous plutonium was present in the +IV oxidation state across all experimental conditions except at pHm ≈ 1, where a small fraction of Pu(III) was also identified. Current thermodynamic models overestimate Pu(IV)-EDTA solubility in the absence of calcium by approximately 1-1.5 log10-units and do not describe the nearly pH-independent, increased solubility observed with increased calcium concentrations. The ternary Pu(IV)-OH-EDTA system without calcium was reevaluated using solubility data obtained in this work and reported in the literature. An updated thermodynamic model including the complexes Pu(OH)(EDTA)-, Pu(OH)2(EDTA)2-, and Pu(OH)3(EDTA)3- was derived. Solubility data collected in the presence of calcium follows a pH-independent trend (log m(Pu)tot vs. pHm), which can only be explained by assuming the formation of a quaternary complex, tentatively defined as CaPu(OH)4(EDTA)2-, in solution. The significant enhancement of plutonium solubility observed in the investigated brine systems supports the formation of a quaternary complex that is not outcompeted by Ca(EDTA)2-, even in concentrated CaCl2 solutions. Although the exact stoichiometry of the complex may need to be revisited, this new quaternary complex has a pronounced impact on plutonium predominance diagrams over a broad range of pH, pe, and calcium concentrations that are relevant to nuclear waste disposal.
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Affiliation(s)
- Nicole A DiBlasi
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, 301 Stinson-Remick, Notre Dame, IN 46556, United States of America
| | - Agost G Tasi
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Xavier Gaona
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, P.O. Box 3640, 76021 Karlsruhe, Germany.
| | - David Fellhauer
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Kathy Dardenne
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Jörg Rothe
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Donald T Reed
- Los Alamos National Laboratory, 1400 University Dr., Carlsbad, NM 88220, United States of America
| | - Amy E Hixon
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, 301 Stinson-Remick, Notre Dame, IN 46556, United States of America.
| | - Marcus Altmaier
- Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, P.O. Box 3640, 76021 Karlsruhe, Germany
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DiBlasi NA, Yalçintas E, Stanley FE, Reed DT, Hixon AE. Influence of ethylenediaminetetraacetic acid on the long-term oxidation state distribution of plutonium. CHEMOSPHERE 2021; 274:129741. [PMID: 33545584 DOI: 10.1016/j.chemosphere.2021.129741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 01/08/2021] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
Spectrophotometry was used to study the effect of EDTA on plutonium oxidation state distribution as a function of time, pH, and ligand-to-metal ratio (L/M) under anoxic conditions. Novel Pu(V)-EDTA absorption bands were identified at 571, 993, 1105, and 1150 nm with molar absorption coefficients of 15 ± 1, 6 ± 1, 10 ± 1, and 10 ± 1 cm-1M-1, respectively. Pu(V)-EDTA spectral changes occurred at L/M < 1, indicating only PuVO2(EDTA)3- formed with logK = 3.6 ± 0.3. Time-resolved experiments showed EDTA drastically increased the Pu(V/VI) reduction rate, which we propose is driven by amine lone-pair electron donation and the oxidative decarboxylation of EDTA. Oxidation of Pu(III)-EDTA to Pu(IV)-EDTA occurred on a slower time scale (110-237 days) than previously reported (<15 min) and is hypothesized to be radiolysis driven. Pu(V/VI)-EDTA and Pu(III)-EDTA both approached Pu(IV)-EDTA stabilization over time, yet Pu(V/VI)-EDTA solubility data was ≥ 1.0 log10 units higher than predicted by Pu(IV)-EDTA solubility models, indicating that current thermodynamic models are incomplete. Ultimately, the data show EDTA preferentially stabilizes Pu(IV) over time regardless of initial oxidation state, but Pu(V)-EDTA can persist under environmentally-relevant conditions, emphasizing the need to continue investigating redox reactions, speciation, and behavior of these complexes to support the transuranic waste disposal and surface remediation/containment efforts.
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Affiliation(s)
- Nicole A DiBlasi
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, 301 Stinson-Remick Hall, Notre Dame, IN, 46556, USA; Los Alamos National Laboratory, 1400 University Dr., Carlsbad, NM, 88220, USA
| | - Ezgi Yalçintas
- Los Alamos National Laboratory, 1400 University Dr., Carlsbad, NM, 88220, USA
| | - Floyd E Stanley
- Los Alamos National Laboratory, 1400 University Dr., Carlsbad, NM, 88220, USA
| | - Donald T Reed
- Los Alamos National Laboratory, 1400 University Dr., Carlsbad, NM, 88220, USA
| | - Amy E Hixon
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, 301 Stinson-Remick Hall, Notre Dame, IN, 46556, USA.
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Sladkov V, Roques J, Meyer M. Assignment of complex species by affinity capillary electrophoresis: The case of Th(IV)-desferrioxamine B. Electrophoresis 2020; 41:1870-1877. [PMID: 32543780 DOI: 10.1002/elps.202000114] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/08/2020] [Accepted: 06/13/2020] [Indexed: 12/11/2022]
Abstract
The electrophoretic mobility change of desferrioxamine B (DFO) was monitored by UV absorption spectrophotometry upon increasing the thorium(IV) concentration in the background electrolyte at two acidities ([HClO4 ]Tot = 0.0316 and 0.0100 M). These data enabled to assess the speciation model and to determine the equilibrium constant of [Th(DFO)H2 ]3+ at fixed ionic strength (I = 0.1 M (H,Na)ClO4 ). Affinity capillary electrophoresis (ACE) turned out to be most helpful in identifying the complexed species by ascertaining its charge and protonation state. The assignment of the correct stoichiometry relied on the reliable estimation of the electrophoretic mobility by assuming similar hydrodynamic radii for (DFO)H4 + and the chelate. The value of the apparent equilibrium constant (log β112 = 38.7 ± 0.4) obtained by ACE compares favorably well with those reported in the literature for thorium and a range of other metal ions, according to a linear free-energy relationship. This method is useful for studying metal-ligand binding equilibria and provides valuable information for further modelling the behavior of tetravalent actinides under environmental conditions. Structural information about the prevalent solution species in acidic conditions was gained by DFT calculations, confirming the bishydroxamato coordination mode of Th4+ by the diprotonated ligand.
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Affiliation(s)
- Vladimir Sladkov
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France
| | - Jérôme Roques
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France
| | - Michel Meyer
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université Bourgogne-Franche-Comté, 9 Avenue Alain Savary, BP 47870, 21078, Dijon, Cedex, France
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7
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Sornosa-Ten A, Jewula P, Fodor T, Brandès S, Sladkov V, Rousselin Y, Stern C, Chambron JC, Meyer M. Effects of preorganization in the chelation of UO22+by hydroxamate ligands: cyclic PIPO−vs.linear NMA−. NEW J CHEM 2018. [DOI: 10.1039/c8nj00166a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Thanks to preorganization, 1,2-PIPOH, the six-membered ring cyclic hydroxamic acid, binds uranyl six times more strongly than its linear, methyl-substituted homolog (NMAH).
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Affiliation(s)
- Alejandra Sornosa-Ten
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302
- CNRS
- Université de Bourgogne – Franche-Comté
- 21078 Dijon Cedex
| | - Pawel Jewula
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302
- CNRS
- Université de Bourgogne – Franche-Comté
- 21078 Dijon Cedex
| | - Tamas Fodor
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302
- CNRS
- Université de Bourgogne – Franche-Comté
- 21078 Dijon Cedex
| | - Stéphane Brandès
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302
- CNRS
- Université de Bourgogne – Franche-Comté
- 21078 Dijon Cedex
| | - Vladimir Sladkov
- Institut de Physique Nucléaire d'Orsay (IPNO)
- UMR 8608
- CNRS
- Université Paris Sud
- 91406 Orsay Cedex
| | - Yoann Rousselin
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302
- CNRS
- Université de Bourgogne – Franche-Comté
- 21078 Dijon Cedex
| | - Christine Stern
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302
- CNRS
- Université de Bourgogne – Franche-Comté
- 21078 Dijon Cedex
| | - Jean-Claude Chambron
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302
- CNRS
- Université de Bourgogne – Franche-Comté
- 21078 Dijon Cedex
| | - Michel Meyer
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302
- CNRS
- Université de Bourgogne – Franche-Comté
- 21078 Dijon Cedex
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Audras M, Berthon L, Berthon C, Guillaumont D, Dumas T, Illy MC, Martin N, Zilbermann I, Moiseev Y, Ben-Eliyahu Y, Bettelheim A, Cammelli S, Hennig C, Moisy P. Structural Characterization of Am(III)- and Pu(III)-DOTA Complexes. Inorg Chem 2017; 56:12248-12259. [DOI: 10.1021/acs.inorgchem.7b01666] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthieu Audras
- Nuclear Energy Division,
Research Department on Mining and Fuel Recycling Processes, CEA, BP17171 F-30207 Bagnols-sur-Cèze, France
| | - Laurence Berthon
- Nuclear Energy Division,
Research Department on Mining and Fuel Recycling Processes, CEA, BP17171 F-30207 Bagnols-sur-Cèze, France
| | - Claude Berthon
- Nuclear Energy Division,
Research Department on Mining and Fuel Recycling Processes, CEA, BP17171 F-30207 Bagnols-sur-Cèze, France
| | - Dominique Guillaumont
- Nuclear Energy Division,
Research Department on Mining and Fuel Recycling Processes, CEA, BP17171 F-30207 Bagnols-sur-Cèze, France
| | - Thomas Dumas
- Nuclear Energy Division,
Research Department on Mining and Fuel Recycling Processes, CEA, BP17171 F-30207 Bagnols-sur-Cèze, France
| | - Marie-Claire Illy
- Nuclear Energy Division,
Research Department on Mining and Fuel Recycling Processes, CEA, BP17171 F-30207 Bagnols-sur-Cèze, France
| | - Nicolas Martin
- Nuclear Energy Division,
Research Department on Mining and Fuel Recycling Processes, CEA, BP17171 F-30207 Bagnols-sur-Cèze, France
| | - Israel Zilbermann
- Chemistry Department, Nuclear Research Centre Negev, IL-84190 Beer Sheva, Israel
| | - Yulia Moiseev
- Chemistry Department, Nuclear Research Centre Negev, IL-84190 Beer Sheva, Israel
| | | | - Armand Bettelheim
- Chemical Engineering
Department, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Sebastiano Cammelli
- Synchrotron SOLEIL, L’Orme des Merisiers, BP
48, Saint Aubin, Gif sur Yvette 91192, France
| | - Christoph Hennig
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstr. 400, D-01328 Dresden, Germany
| | - Philippe Moisy
- Nuclear Energy Division,
Research Department on Mining and Fuel Recycling Processes, CEA, BP17171 F-30207 Bagnols-sur-Cèze, France
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9
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Boija S, Almesåker A, Hedenström E, Bylund D, Edlund H, Norgren M. Determination of conditional stability constants for some divalent transition metal ion-EDTA complexes by electrospray ionization mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:550-556. [PMID: 25044839 DOI: 10.1002/jms.3372] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 04/07/2014] [Indexed: 06/03/2023]
Abstract
Conditional stability constants of coordination complexes comprising divalent transition metals, Cu(2+), Ni(2+), Zn(2+), Co(2+), and ethylenediaminetetraacetic acid (EDTA) were determined utilizing electrospray ionization mass spectrometry. The deviation of signal response of a reference complex was monitored at addition of a second metal ion. The conditional stability constant for the competing metal was then determined through solution equilibria equations. The method showed to be applicable to a system where Co(2+) and Zn(2+) competed for EDTA at pH 5. When Cu(2+) and Ni(2+) competed for EDTA, the equilibrium changed over time. This change was shown to be affected in rate and size by the type of organic solvent added. In this work, 30% of either methanol or acetonitrile was used. It was found that if calibration curves are prepared for both metal complexes in solution and the measurements are repeated with sufficient time space, any change in equilibrium of sample solutions will be discovered.
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Affiliation(s)
- Susanne Boija
- Fibre Science and Communication Network (FSCN), Mid Sweden University, SE-851 70, Sundsvall, Sweden
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10
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Colàs E, Grivé M, Rojo I, Duro L. The Effect of Gluconate and EDTA on Thorium Solubility Under Simulated Cement Porewater Conditions. J SOLUTION CHEM 2013. [DOI: 10.1007/s10953-013-0054-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Rojo H, Tits J, Gaona X, Garcia-Gutiérrez M, Missana T, Wieland E. Thermodynamics of Np(IV) complexes with gluconic acid under alkaline conditions: sorption studies. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.2013.2022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The complexation of Np(IV) with gluconic acid (GLU) under alkaline conditions was investigated in the absence of Ca by carrying out a series of sorption experiments. The decrease of Np(IV) sorption on the sorbing material at increasing concentrations of GLU was interpreted as the formation of Np(IV)-GLU aqueous complexes. The modelling of experimental data according to the Schubert method [1] confirmed the formation of a complex with a Np : GLU ratio 1 : 1. The stoichiometry of the complex Np(OH)4GLU− was proposed based on the experimental observation that no proton exchange occurred during the course of the complexation reaction and that Np(OH)4(aq) was the predominant hydrolysis product in the absence of GLU. A log *
β
1,4,1
0 = −2.92 ± 0.30 for the formation reaction Np4+ + 4H2O + GLU−⇔Np(OH)4GLU− + 4H+ was calculated based on the conditional stability constants determined from sorption experiments and using the Np(IV) thermodynamic data selected in the NEA reviews [2].
Linear free energy relationships (LFER) confirmed that the stoichiometry and stability of the Np(IV)-GLU complex characterized in this work are consistent with data available for Th(IV)-, U(IV)- and Pu(IV)-GLU complexes.
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12
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Newell BS, Schwaab TC, Shores MP. Synthesis and Characterization of a Novel Tetranuclear 5f Compound: A New Synthon for Exploring U(IV) Chemistry. Inorg Chem 2011; 50:12108-15. [DOI: 10.1021/ic201670z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Brian S. Newell
- Department of Chemistry, Colorado State University, Fort Collins,
Colorado 80523-1872,
United States
| | - Trevor C. Schwaab
- Department of Chemistry, Colorado State University, Fort Collins,
Colorado 80523-1872,
United States
| | - Matthew P. Shores
- Department of Chemistry, Colorado State University, Fort Collins,
Colorado 80523-1872,
United States
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Gaona X, Montoya V, Colàs E, Grivé M, Duro L. Review of the complexation of tetravalent actinides by ISA and gluconate under alkaline to hyperalkaline conditions. JOURNAL OF CONTAMINANT HYDROLOGY 2008; 102:217-227. [PMID: 18992962 DOI: 10.1016/j.jconhyd.2008.09.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Revised: 07/30/2008] [Accepted: 09/29/2008] [Indexed: 05/27/2023]
Abstract
Isosaccharinic (ISA) and gluconic acids (GLU) are polyhydroxy carboxylic compounds showing a high affinity to metal complexation. Both organic ligands are expected in the cementitious environments usually considered for the disposal of low- and intermediate-level radioactive wastes. The hyperalkaline conditions imposed by cementitious materials contribute to the formation of ISA through cellulose degradation, whereas GLU is commonly used as a concrete additive. Despite the high stability attributed to ISA/GLU complexes of tetravalent actinides, the number and reliability of available experimental studies is still limited. This work aims at providing a general and comprehensive overview of the state of the art regarding Th, U(IV), Np(IV), and Pu(IV) complexes with ISA and GLU. In the presence of ISA/GLU concentrations in the range 10(-5)-10(-2) M and absence of calcium, An(IV)(OH)x(L)y complexes (An(IV)=Th, U(IV), Np(IV), Pu(IV); L=ISA, GLU) are expected to dominate the aqueous speciation of tetravalent actinides in the alkaline pH range. There is a moderate agreement among their stability, although the stoichiometry of certain An(IV)-GLU complexes is still ill-defined. Under hyperalkaline conditions and presence of calcium, the species CaTh(OH)4(L)2(aq) has been described for both ISA and GLU, and similar complexes may be expected to form with other tetravalent actinides. In the present work, the available thermodynamic data for An(IV)-ISA/GLU complexes have been reviewed and re-calculated to ensure the internal consistency of the stability constants assessed. Further modelling exercises, estimations based on Linear Free-Energy Relationships (LFER) among tetravalent actinides, as well as direct analogies between ISA and GLU complexes have also been performed. This approach has led to the definition of a speciation scheme for the complexes of Th, U(IV), Np(IV) and Pu(IV) with ISA and GLU forming in alkaline to hyperalkaline pH conditions, both in the absence and presence of calcium.
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Affiliation(s)
- X Gaona
- Amphos21, E-08197 Valldoreix, Spain.
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