1
|
Gujar RB, Kanekar AS, Bhattacharyya A, Karthikeyan NS, Ravichandran C, Toleti SR, Egberink RJM, Huskens J, Verboom W, Mohapatra PK. Remarkable Improvement in Am 3+ and Cm 3+ Separation Using a Cooperative Counter Selectivity Strategy by a Combination of Branched Diglycolamides and Hydrophilic Polyaza-heterocycles. Inorg Chem 2024. [PMID: 38861395 DOI: 10.1021/acs.inorgchem.4c01081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Separation of Am3+ and Cm3+ is one of the most challenging problems in the back-end of the nuclear fuel cycle. In the present work, we exploited the cooperative effect of the opposite selectivity of hydrophobic branched DGA derivatives and hydrophobic N-donor heterocyclic ligands taken in two different phases to achieve improved separation behavior. A systematic study was performed using a series of DGA derivatives to understand the effect and the position of branching in the alkyl chains on the separation behavior of Am3+ and Cm3+. A separation factor (S.F.) value as high as 10 for Cm3+ over Am3+ was obtained in the case of TiBDGA (N,N,N',N'-tetra-iso-butyl diglycolamide) using SO3PhBTPhen ((phenanthroline-2,9-diyl)-1,2,4-triazine-5,5,6,6-tetrayltetrabenzenesulfonic acid) as the aqueous complexant, which is the highest reported value so far for the ligand-based separation of Am3+ and Cm3+ without involving any oxidation or reduction step. The high selectivity favoring Cm3+ ion extraction in the case of this DGA derivative is also explained with the help of computational studies.
Collapse
Affiliation(s)
- Rajesh B Gujar
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Avinash S Kanekar
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | | | | | | | - Subba Rao Toleti
- School of Arts and Sciences, Sai University, Chennai 603104, India
| | - Richard J M Egberink
- Molecular Nanofabrication Group, MESA+ Institute of Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Jurriaan Huskens
- Molecular Nanofabrication Group, MESA+ Institute of Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Willem Verboom
- Molecular Nanofabrication Group, MESA+ Institute of Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | | |
Collapse
|
2
|
Cao H, Kang Y, Li B, Liu Y, Bao M, Li H, Zheng Y, Wang L, Weng C, Tang X, Wang L, Xu C. Amine-Terminated Phenanthroline Diimides as Aqueous Masking Agents for Am(III)/Eu(III) Separation: An Alternative Ligand Design Strategy for Water-Soluble Lanthanide/Actinide Chelating Ligands. Inorg Chem 2024; 63:10511-10518. [PMID: 38768636 DOI: 10.1021/acs.inorgchem.4c00710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Selective actinide coordination (from lanthanides) is critical for both nuclear waste management and sustainable development of nuclear power. Hydrophilic ligands used as masking agents to withhold actinides in the aqueous phase are currently highly pursued, while synthetic accessibility, water solubility, acid resistance, and extraction capability are the remaining problems. Most reported hydrophilic ligands are only effective at low acidity. We recently proved that the phenanthroline diimide skeleton was an efficient building block for the construction of highly efficient acid-resistant hydrophilic lanthanide/actinide separation agents, while the limited water solubility hindered the loading capability of the ligand. Herein, amine was introduced as the terminal solubilizing group onto the phenanthroline diimide backbone, which after protonation in acid showed high water solubility. The positively charged terminal amines enhanced the ligand water solubility to a large extent, which, on the other side, was believed to be detrimental for the coordination and complexation of the metal cations. We showed that by delicately adjusting the alkyl chain spacing, this intuitive disadvantage could be relieved and superior extraction performances could be achieved. This work holds significance for both hydrophilic lanthanide/actinide separation ligand design and, concurrently, offers insights into the development of water-soluble lanthanide/actinide complexes for biomedical and bioimaging applications.
Collapse
Affiliation(s)
- Hong Cao
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
| | - Yu Kang
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Centre for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Haidian District, Beijing 100871, China
| | - Bin Li
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China
| | - Yaoyang Liu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China
| | - Mingjie Bao
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
| | - Haoyu Li
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
| | - Yuan Zheng
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
| | - Ludi Wang
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
| | - Chaoqun Weng
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Centre for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Haidian District, Beijing 100871, China
| | - Xiaoyan Tang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Centre for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Haidian District, Beijing 100871, China
| | - Li Wang
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China
| |
Collapse
|
3
|
Yan X, Jiang H, Liu Z, Wang D. Computational Comparative Study of the Binding of Americium with N-Donor Ligands. Inorg Chem 2024; 63:8206-8214. [PMID: 38647176 DOI: 10.1021/acs.inorgchem.4c00448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
The accessibility of multiple valence states of americium (Am) inspired redox-based protocols aimed at efficient separation of trivalent Am (Am3+) from trivalent lanthanides (Ln3+) alternative to the traditional liquid-liquid extraction. This requires an extensive understanding of the coordination chemistry of Am in its various accessible valence states in the aqueous phase. In this work, by means of DFT calculations, the coordination of AmIII-VI with five typical N-donor ligands, i.e., terpyridine (tpy), bispyrazinylpyridine (dpp), bistriazinylpyridine (BTP), bistriazinyl bipyridine (BTBP), and bistrazinyl phenanthroline (BTPhen), was studied in terms of energy and topological analysis. The results show that the exchange of aqua ligands of hydrated ions by N-donor ligands is an entropy-driven process and enthalpically unfavorable. Topological analysis suggests a distinct mechanism of BTP to modulate the redox potential of Am(III) in that BTP can assist the relay of the leaving electron of AmIII, while the other N-donor ligands can detain the oxidation of Am by offering their electron instead. This comparative study enriches our understanding of the coordination chemistry of high-valent Am with N-donor ligands and recommends the ligand design toward the modulation of redox potentials of hydrated Am(III) ions.
Collapse
Affiliation(s)
- Xin Yan
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemistry, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Hui Jiang
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemistry, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ziyi Liu
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemistry, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Dongqi Wang
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemistry, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
4
|
Wedal JC, Moore WNG, Lukens WW, Evans WJ. Perplexing EPR Signals from 5f 36d 1 U(II) Complexes. Inorg Chem 2024; 63:2945-2953. [PMID: 38279200 DOI: 10.1021/acs.inorgchem.3c03449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2024]
Abstract
Metal complexes with unpaired electrons in orbitals of different angular momentum quantum numbers (e.g., f and d orbitals) are unusual and opportunities to study the interactions among these electrons are rare. X-band electron paramagnetic resonance (EPR) data were collected at <10 and 77 K on 10 U(II) complexes with 5f36d1 electron configurations and on some analogous Ce(II), Pr(II), and Nd(II) complexes with 4fn5d1 electron configurations. The U(II) compounds unexpectedly display similar two-line axial signals with g|| = 2.04 and g⊥ = 2.00 at 77 K. In contrast, U(II) complexes with 5f4 configurations are EPR-silent. Unlike U(II), the congenic 4f35d1 Nd(II) complex is EPR-silent. The Ce(II) complex with a 4f15d1 configuration is also EPR-silent, but a signal is observed for the Pr(II) complex, which has a 4f25d1 configuration. Whether or not an EPR signal is expected for these complexes depends on the coupling between f and d electrons. Since the coupling in U(II) systems is expected to be sufficiently strong to preclude an EPR signal from compounds with a 5f36d1 configuration, the results are viewed as unexplained phenomena. However, they do show that 5f36d1 U(II) samples can be differentiated from 5f4 U(II) complexes by EPR spectroscopy.
Collapse
Affiliation(s)
- Justin C Wedal
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - William N G Moore
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Wayne W Lukens
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - William J Evans
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| |
Collapse
|
5
|
Dong X, Hao H, Chen J, Wang Z, Xu C. Redox stabilization of Am(v) in a biphasic extraction system boosts americium/lanthanides separation efficiency. Chem Sci 2024; 15:2118-2122. [PMID: 38332823 PMCID: PMC10848673 DOI: 10.1039/d3sc06240f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 12/25/2023] [Indexed: 02/10/2024] Open
Abstract
Americium (Am) is a key radioactive element in consideration in nuclear waste treatment. Separation of Am from the fission products, lanthanides, is a prerequisite to minimize the hazardous impact of Am and make utilization of rare Am isotopes, but it represents a great challenge due to the chemical similarity between the two groups of elements. Herein, we realize the separation by first oxidizing Am(iii) to high valent Am(vi) and then converting it to Am(v) in situ in a biphasic extraction system with Bi(v) oxidant incorporated in an organic phase. Am(v) is highly stabilized during the separation process and this leads to record high Ln/Am separation factors (>105) in a single contact over a wide range of acidities.
Collapse
Affiliation(s)
- Xue Dong
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| | - Huaixin Hao
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| |
Collapse
|
6
|
Liu Y, Kang Y, Bao M, Cao H, Weng C, Dong X, Hao H, Tang X, Chen J, Wang L, Xu C. Hydroxyl-group functionalized phenanthroline diimides as efficient masking agents for Am(III)/Eu(III) separation under harsh conditions. JOURNAL OF HAZARDOUS MATERIALS 2024; 462:132756. [PMID: 37866146 DOI: 10.1016/j.jhazmat.2023.132756] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/04/2023] [Accepted: 10/09/2023] [Indexed: 10/24/2023]
Abstract
The separation of Lns(III) from radioactive Ans(III) in high-level liquid waste remains a formidable hydrometallurgical challenge. Water-soluble ligands are believed to be new frontiers in the search of efficient Lns/Ans separation ligands to close the nuclear fuel cycles and dealing with current existing nuclear waste. Currently, the development of hydrophilic ligands far lags behind their lipophilic counterparts due to their complicated synthetic procedures, inferior extraction performances, and acid tolerances. In this paper, we have showed a series of hydroxyl-group functionalized phenanthroline diimides were efficient masking agents for Am(III)/Eu(III) separation under high acidity (˃ 1 M HNO3). Record high SFEu(III)/Am(III) of 162 and 264 were observed for Phen-2DIC2OH and Phen-2DIC4OH in 1.25 M HNO3 which represents the best Eu(III)/Am(III) separation performance at this acidity. UV-vis absorption, NMR and TRLFS titrations were conducted to elucidate the predominant of 1:1 ligand/metal species under extraction conditions. X-ray data of both the ligand and Eu(III) complex together with DFT calculations revealed the superior extraction performances and selectivities. The current reported hydrophilic ligands were easy to prepare and readily to scale-up, acid tolerant and highly efficient, together with their CHON-compatible nature make them promising candidates in the development of advanced separation processes.
Collapse
Affiliation(s)
- Yaoyang Liu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China
| | - Yu Kang
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
| | - Mingjie Bao
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China
| | - Hong Cao
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China
| | - Chaoqun Weng
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 China
| | - Xue Dong
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China
| | - Huaixin Hao
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China
| | - Xiaoyan Tang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China.
| | - Li Wang
- Department of Chemistry, Capital Normal University, Haidian District, Beijing 100048, China.
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Haidian District, Beijing 100084, China.
| |
Collapse
|
7
|
Nyman M, Deblonde G. Metal-oxide cages open up strategy for processing nuclear waste. Nature 2023; 616:438-440. [PMID: 37076733 DOI: 10.1038/d41586-023-01019-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
|
8
|
Zhang H, Li A, Li K, Wang Z, Xu X, Wang Y, Sheridan MV, Hu HS, Xu C, Alekseev EV, Zhang Z, Yan P, Cao K, Chai Z, Albrecht-Schönzart TE, Wang S. Ultrafiltration separation of Am(VI)-polyoxometalate from lanthanides. Nature 2023; 616:482-487. [PMID: 37076728 PMCID: PMC10115636 DOI: 10.1038/s41586-023-05840-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 02/14/2023] [Indexed: 04/21/2023]
Abstract
Partitioning of americium from lanthanides (Ln) present in used nuclear fuel plays a key role in the sustainable development of nuclear energy1-3. This task is extremely challenging because thermodynamically stable Am(III) and Ln(III) ions have nearly identical ionic radii and coordination chemistry. Oxidization of Am(III) to Am(VI) produces AmO22+ ions distinct with Ln(III) ions, which has the potential to facilitate separations in principle. However, the rapid reduction of Am(VI) back to Am(III) by radiolysis products and organic reagents required for the traditional separation protocols including solvent and solid extractions hampers practical redox-based separations. Herein, we report a nanoscale polyoxometalate (POM) cluster with a vacancy site compatible with the selective coordination of hexavalent actinides (238U, 237Np, 242Pu and 243Am) over trivalent lanthanides in nitric acid media. To our knowledge, this cluster is the most stable Am(VI) species in aqueous media observed so far. Ultrafiltration-based separation of nanoscale Am(VI)-POM clusters from hydrated lanthanide ions by commercially available, fine-pored membranes enables the development of a once-through americium/lanthanide separation strategy that is highly efficient and rapid, does not involve any organic components and requires minimal energy input.
Collapse
Affiliation(s)
- Hailong Zhang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Ao Li
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Kai Li
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
| | - Xiaocheng Xu
- Department of Chemistry and Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing, China
| | - Yaxing Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China.
| | - Matthew V Sheridan
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Han-Shi Hu
- Department of Chemistry and Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China.
| | | | - Zhenyi Zhang
- Bruker (Beijing) Scientific Technology Co., Ltd, Shanghai, China
| | - Pu Yan
- Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai, China
| | - Kecheng Cao
- Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai, China
| | - Zhifang Chai
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Nuclear Science & Engineering Center, Colorado School of Mines, Golden, CO, USA.
| | - Shuao Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China.
| |
Collapse
|
9
|
Ion sieving in graphene oxide membrane enables efficient actinides/lanthanides separation. Nat Commun 2023; 14:261. [PMID: 36650148 PMCID: PMC9845371 DOI: 10.1038/s41467-023-35942-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 01/09/2023] [Indexed: 01/19/2023] Open
Abstract
Separation of actinides from lanthanides is of great importance for the safe management of nuclear waste and sustainable development of nuclear energy, but it represents a huge challenge due to the chemical complexity of these f-elements. Herein, we report an efficient separation strategy based on ion sieving in graphene oxide membrane. In the presence of a strong oxidizing reagent, the actinides (U, Np, Pu, Am) in a nitric acid solution exist in the high valent and linear dioxo form of actinyl ions while the lanthanides (Ce, Nd, Eu, Gd, etc.) remain as trivalent/tetravalent spheric ions. A task-specific graphene oxide membrane with an interlayer nanochannel spacing between the sizes of hydrated actinyl ions and lanthanides ions is tailored and used as an ionic cut-off filter, which blocks the larger and linear actinyl ions but allows the smaller and spheric lanthanides ions to penetrate through, affording lanthanides/actinides separation factors up to ~400. This work realizes the group separation of actinides from lanthanides under highly acidic conditions by a simple ion sieving strategy and highlights the great potential of utilizing graphene oxide membrane for nuclear waste treatment.
Collapse
|
10
|
Dong X, Yan Q, Wang Z, Feng X, Chen J, Xu C. Group Separation of Hexavalent Actinides from Lanthanides through Selective Extraction by Sterically Hindered 2-Ethylhexyl Phosphonic Acid Mono-2-ethylhexyl Ester. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xue Dong
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Qiang Yan
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Xiaogui Feng
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| |
Collapse
|
11
|
Weßling P, Maag M, Baruth G, Sittel T, Sauerwein FS, Wilden A, Modolo G, Geist A, Panak PJ. Complexation and Extraction Studies of Trivalent Actinides and Lanthanides with Water-Soluble and CHON-Compatible Ligands for the Selective Extraction of Americium. Inorg Chem 2022; 61:17719-17729. [DOI: 10.1021/acs.inorgchem.2c02871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Patrik Weßling
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021Karlsruhe, Germany
- Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 234, 69120Heidelberg, Germany
| | - Melina Maag
- Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 234, 69120Heidelberg, Germany
| | - Giana Baruth
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021Karlsruhe, Germany
- Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 234, 69120Heidelberg, Germany
| | - Thomas Sittel
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021Karlsruhe, Germany
| | - Fynn S. Sauerwein
- Institut für Energie und Klimaforschung − Nukleare Entsorgung (IEK-6), Forschungszentrum Jülich GmbH, 52428Jülich, Germany
| | - Andreas Wilden
- Institut für Energie und Klimaforschung − Nukleare Entsorgung (IEK-6), Forschungszentrum Jülich GmbH, 52428Jülich, Germany
| | - Giuseppe Modolo
- Institut für Energie und Klimaforschung − Nukleare Entsorgung (IEK-6), Forschungszentrum Jülich GmbH, 52428Jülich, Germany
| | - Andreas Geist
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021Karlsruhe, Germany
| | - Petra J. Panak
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021Karlsruhe, Germany
- Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 234, 69120Heidelberg, Germany
| |
Collapse
|
12
|
Jiang H, Liu Z, He L, Chai Z, Wang D. The Speciation of Americium Cations in Neat Water Implicated from DFT Studies. Inorg Chem 2022; 61:13858-13867. [PMID: 35984920 DOI: 10.1021/acs.inorgchem.2c01805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The recent observed manipulatable redox potential of trivalent americium ion in the aqueous phase by modifying an electrode offers an alternative to accomplish the separation. In order to understand extensively the speciation of Am, which is the prerequisite to understanding the mechanism of the oxidation of Am, we conducted a density functional study to identify the potential species of Am in its tri-, tetra-, and pentavalent states in aqueous phase. Based on the speciation analysis, the calculations implicate a stepwise mechanism for the oxidation of hydrated Am(III), which predominantly exists in its hydrated monatomic cationic form (Am3+(aq)). The two sequential one-electron oxidation processes first produce AmO2+(aq), which may establish an equilibrium with Am4+(aq), and the AmO2+(aq) may then evolve to the dioxo americyl(V) ion. These results suggest the copresence of Am4+(aq) and AmO2+(aq), which builds a bridge for the conversion of americium ion from a monatomic ion to dioxo americyl(V).
Collapse
Affiliation(s)
- Hui Jiang
- School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ziyi Liu
- School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Lei He
- School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhifang Chai
- State Key Laboratory of Radiation Medicine and Protection, and School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou 215123, China.,Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Dongqi Wang
- School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
13
|
Rice NT, Dalodière E, Adelman SL, Jones ZR, Kozimor SA, Mocko V, Root HD, Stein BW. Oxidizing Americium(III) with Sodium Bismuthate in Acidic Aqueous Solutions. Inorg Chem 2022; 61:12948-12953. [PMID: 35939562 DOI: 10.1021/acs.inorgchem.2c01596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Historic perspectives describing f-elements as being redox "inactive" are fading. Researchers continue to discover new oxidation states that are not as inaccessible as once assumed for actinides and lanthanides. Inspired by those contributions, we studied americium(III) oxidation in aqueous media under air using NaBiO3(s). We identified selective oxidation of Am3+(aq) to AmO22+(aq) or AmO21+(aq) could be achieved by changing the aqueous matrix identity. AmO22+(aq) formed in H3PO4(aq) (1 M) and AmO21+(aq) formed in dilute HCl(aq) (0.1 M). These americyl products were stable for weeks in solution. Also included is a method to recover 243Am from the americium and bismuth mixtures generated during these studies.
Collapse
Affiliation(s)
- Natalie T Rice
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Elodie Dalodière
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Sara L Adelman
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Zachary R Jones
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Stosh A Kozimor
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Veronika Mocko
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Harrison D Root
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Benjamin W Stein
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| |
Collapse
|
14
|
Wang Z, Dong X, Yan Q, Chen J, Xu C. Separation of Americium from Curium through Oxidation State Control with Record Efficiency. Anal Chem 2022; 94:7743-7746. [PMID: 35608454 DOI: 10.1021/acs.analchem.2c01492] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Separation of americium (Am) from curium (Cm) could greatly facilitate the development of advanced nuclear fuel cycles, help with accurate nuclear forensic analysis, and allow for more efficient recovery and utilization of the two strategic elements. In this work, an Am/Cm separation strategy based on the stabilization of pentavalent Am in a biphasic solvent extraction system using bismuthate as the oxidant and N,N,N',N'-tetraoctyl diglycolamide (TODGA) as the extractant was developed. The distinctive differences between Am(V) and Cm(III) in terms of both steric configuration and charge density afford record high Cm/Am separation factors (>104) through only one single contact in solvent extraction. This separation strategy possesses superior features including fast kinetics, long-time stability, no secondary solid radioactive waste generation, and applicability over a wide range of HNO3 acidities, making it promising for Am/Cm separation and analysis in a variety of applications.
Collapse
Affiliation(s)
- Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Xue Dong
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Qiang Yan
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
| |
Collapse
|
15
|
Matsuda S, Yokoyama K, Yaita T, Kobayashi T, Kaneta Y, Simonnet M, Sekiguchi T, Honda M, Shimojo K, Doi R, Nakashima N. Marking actinides for separation: Resonance-enhanced multiphoton charge transfer in actinide complexes. SCIENCE ADVANCES 2022; 8:eabn1991. [PMID: 35584222 PMCID: PMC9116592 DOI: 10.1126/sciadv.abn1991] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 04/04/2022] [Indexed: 06/15/2023]
Abstract
Precise separation and purification of f-block elements are important and challenging especially for the reduction of nuclear waste and the recycling of rare metals but are practically difficult mainly because of their chemical similarity. A promising way to overcome this difficulty is controlling their oxidation state by nonchemical processes. Here, we show resonance-enhanced multiphoton charge transfer in actinide complexes, which leads to element-specific control of their oxidation states owing to the distinct electronic spectra arising from resonant transitions between f orbitals. We observed oxidation of trivalent americium in nitric acid. In addition, we found that the coordination of nitrates is essential for promoting the oxidation reaction, which is the first finding ever relevant to the primary process of photoexcitation via resonant transitions of f-block elements. The resonance-enhanced photochemical process could be used in the nuclear waste management, as it would facilitate the mutual separation of actinides, such as americium and curium.
Collapse
Affiliation(s)
- Shohei Matsuda
- Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
- Materials Sciences Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Keiichi Yokoyama
- Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Tsuyoshi Yaita
- Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Tohru Kobayashi
- Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Yui Kaneta
- Materials Sciences Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
| | - Marie Simonnet
- Materials Sciences Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Tetsuhiro Sekiguchi
- Materials Sciences Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Mitsunori Honda
- Materials Sciences Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - Kojiro Shimojo
- Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Reisuke Doi
- Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Nobuaki Nakashima
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
- Institute for Laser Technology, 1-8-4 Utsubo-honmachi, Nishi-ku, Osaka 550-0004, Japan
| |
Collapse
|
16
|
Wang Z, Lu JB, Dong X, Yan Q, Feng X, Hu HS, Wang S, Chen J, Li J, Xu C. Ultra-Efficient Americium/Lanthanide Separation through Oxidation State Control. J Am Chem Soc 2022; 144:6383-6389. [PMID: 35353513 DOI: 10.1021/jacs.2c00594] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Lanthanide/actinide separation is a worldwide challenge for atomic energy and nuclear waste treatment. Separation of americium (Am), a critical actinide element in the nuclear fuel cycle, from lanthanides (Ln) is highly desirable for minimizing the long-term radiotoxicity of nuclear waste, yet it is extremely challenging given the chemical similarity between trivalent Am(III) and Ln(III). Selective oxidation of Am(III) to a higher oxidation state (OS) could facilitate this separation, but so far, it is far from satisfactory for practical application as a result of the unstable nature of Am in a high OS. Herein, we find a novel strategy to generate stable pentavalent Am (Am(V)) through coordination of Am(III) with a diglycolamide ligand and oxidation with Bi(V) species in the presence of an organic solvent. This strategy leads to efficient stabilization of Am(V) and an extraordinarily high separation factor (>104) of Am from Ln through one single contact in solvent extraction, thereby opening a new avenue to study the high-OS chemistry of Am and fulfill the crucial task of Ln/Am separation in the nuclear fuel cycle. The synergistic coordination and oxidation process is found to occur in the organic solvent, and the mechanism has been well elucidated by quantum-theoretical modeling.
Collapse
Affiliation(s)
- Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Jun-Bo Lu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xue Dong
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Qiang Yan
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Xiaogui Feng
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Han-Shi Hu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Shuao Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Jun Li
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.,Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| |
Collapse
|
17
|
Zhang Y, Li K, Zhang S, Wang X, Zhang H, Wang Y, Wang Y, Chai Z, Wang S. A Trivalent Americium Organic Framework with Decent Structural Stability against
Self‐Irradiation. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100724] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yugang Zhang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| | - Kai Li
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| | - Sida Zhang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| | - Xia Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| | - Hailong Zhang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| | - Yanlong Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| | - Yaxing Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| | - Zhifang Chai
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| | - Shuao Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University Soochow Jiangsu 215123 China
| |
Collapse
|
18
|
Su J, Cheisson T, McSkimming A, Goodwin CAP, DiMucci IM, Albrecht-Schönzart T, Scott BL, Batista ER, Gaunt AJ, Kozimor SA, Yang P, Schelter EJ. Complexation and redox chemistry of neptunium, plutonium and americium with a hydroxylaminato ligand. Chem Sci 2021; 12:13343-13359. [PMID: 34777753 PMCID: PMC8528073 DOI: 10.1039/d1sc03905a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 09/03/2021] [Indexed: 11/25/2022] Open
Abstract
There is significant interest in ligands that can stabilize actinide ions in oxidation states that can be exploited to chemically differentiate 5f and 4f elements. Applications range from developing large-scale actinide separation strategies for nuclear industry processing to carrying out analytical studies that support environmental monitoring and remediation efforts. Here, we report syntheses and characterization of Np(iv), Pu(iv) and Am(iii) complexes with N-tert-butyl-N-(pyridin-2-yl)hydroxylaminato, [2-(tBuNO)py]−(interchangeable hereafter with [(tBuNO)py]−), a ligand which was previously found to impart remarkable stability to cerium in the +4 oxidation state. An[(tBuNO)py]4 (An = Pu, 1; Np, 2) have been synthesized, characterized by X-ray diffraction, X-ray absorption, 1H NMR and UV-vis-NIR spectroscopies, and cyclic voltammetry, along with computational modeling and analysis. In the case of Pu, oxidation of Pu(iii) to Pu(iv) was observed upon complexation with the [(tBuNO)py]− ligand. The Pu complex 1 and Np complex 2 were also isolated directly from Pu(iv) and Np(iv) precursors. Electrochemical measurements indicate that a Pu(iii) species can be accessed upon one-electron reduction of 1 with a large negative reduction potential (E1/2 = −2.26 V vs. Fc+/0). Applying oxidation potentials to 1 and 2 resulted in ligand-centered electron transfer reactions, which is different from the previously reported redox chemistry of UIV[(tBuNO)py]4 that revealed a stable U(v) product. Treatment of an anhydrous Am(iii) precursor with the [(tBuNO)py]− ligand did not result in oxidation to Am(iv). Instead, the dimeric complex [AmIII(μ2-(tBuNO)py)((tBuNO)py)2]2 (3) was isolated. Complex 3 is a rare example of a structurally characterized non-aqueous Am-containing molecular complex prepared using inert atmosphere techniques. Predicted redox potentials from density functional theory calculations show a trivalent accessibility trend of U(iii) < Np(iii) < Pu(iii) and that the higher oxidation states of actinides (i.e., +5 for Np and Pu and +4 for Am) are not stabilized by [2-(tBuNO)py]−, in good agreement with experimental observations. The coordination modes and electronic properties of a strongly coordinating hydroxylaminato ligand with Np, Pu and Am were investigated.Complexes were characterized by a range of experimental and computational techniques.![]()
Collapse
Affiliation(s)
- Jing Su
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
| | - Alex McSkimming
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
| | - Conrad A P Goodwin
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Ida M DiMucci
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Thomas Albrecht-Schönzart
- Department of Chemistry and Biochemistry, Florida State University 95 Chieftan Way Tallahassee Florida 32306 USA
| | - Brian L Scott
- Materials and Physics Applications Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Enrique R Batista
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Stosh A Kozimor
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
| |
Collapse
|
19
|
Yu X, Einkauf JD, Bryantsev VS, Cheshire MC, Reinhart BJ, Autschbach J, Burns JD. Spectroscopic characterization of neptunium(VI), plutonium(VI), americium(VI) and neptunium(V) encapsulated in uranyl nitrate hexahydrate. Phys Chem Chem Phys 2021; 23:13228-13241. [PMID: 34086024 DOI: 10.1039/d1cp01047f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coordination of crystalline products resulting from the co-crystallization of Np(vi), Pu(vi), Am(vi), and Np(v) with uranyl nitrate hexahydrate (UNH) has been revealed through solid-state spectroscopic characterization via diffuse reflectance UV-Vis-NIR spectroscopy, SEM-EDS, and extended X-ray absorption fine structure (EXAFS) spectroscopy. Density functional and multireference wavefunction calculations were performed to analyze the An(vi/v)O2(NO3)2·2H2O electronic structures and to help assign the observed transitions in the absorption spectra. EXAFS show a similar coordination between the U(VI) in UNH and Np(vi) and Pu(vi); while Am resulted in a similar coordination to Am(iii), as reduction of Am(vi) occurred prior to EXAFS data being obtained. The co-crystallization of the oxidized transuranic species-penta- and hexavalent-with UNH, represents a significant advance from not only a practical standpoint in providing an elegant solution for used nuclear fuel recycle, but also as an avenue to expand the fundamental understanding of the 5f electronic behavior in the solid-state.
Collapse
Affiliation(s)
- Xiaojuan Yu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260, USA.
| | - Jeffrey D Einkauf
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831, USA
| | - Vyacheslav S Bryantsev
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831, USA
| | - Michael C Cheshire
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831, USA
| | | | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260, USA.
| | - Jonathan D Burns
- Nuclear Engineering and Science Center, Texas A&M University, College Station, TX 77843, USA.
| |
Collapse
|
20
|
Bhattacharyya A, Ansari SA, Karthikeyan NS, Ravichandran C, Venkatachalapathy B, Rao TS, Seshadri H, Mohapatra PK. Bis-(1,2,4-triazin-3-yl) ligand structure driven selectivity reversal between Am 3+ and Cm 3+: solvent extraction and DFT studies. Dalton Trans 2021; 50:7783-7790. [PMID: 33999062 DOI: 10.1039/d1dt00307k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Selectivity between Am3+ and Cm3+ was investigated after their aqueous complexation with three structurally tailored hydrophilic bis-(1,2,4-triazin-3-yl) ligands followed by their extraction with N,N,N'N'-tetraoctyl diglycolamide (TODGA) dissolved in an ionic liquid (C4mim·Tf2N). The three hydrophilic ligands used were SO3PhBTP, SO3PhBTBP, and SO3PhBTPhen. It was evident from the solvent extraction studies that SO3PhBTP formed a stronger complex with Cm3+ than with Am3+, but SO3PhBTPhen showed better complexation ability for Am3+ than for Cm3+, and SO3PhBTBP showed no selectivity for the two actinide ions. DFT calculations indicated that the coordinating 'N' atoms in BTP were more co-planar in the complex and this co-planarity was higher in the Cm3+ complex as compared to that in Am3+. In the case of BTBP and BTPhen ligands, on the other hand, the co-planarity was more pronounced in the Am3+ complexes. Mayer's bond order calculations of M-N bonds in the complexes also indicated a reversal of the complexation ability of the BTP and BTPhen ligands for Am3+ and Cm3+. Calculations of the complexation energies further supported the higher selectivity of the BTP ligand for Am3+ by -52.0 kJ mol-1, and better selectivity of the BTPhen ligand for Cm3+ by -24.7 kJ mol-1.
Collapse
Affiliation(s)
| | - S A Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India.
| | - N S Karthikeyan
- Easwari Engineering College, Ramapuram, Chennai - 600089, India
| | - C Ravichandran
- Easwari Engineering College, Ramapuram, Chennai - 600089, India
| | | | - T S Rao
- Water & Steam Chemistry Division, BARC, Kalpakkam - 603102, India
| | - H Seshadri
- Safety Research Institute, Atomic Energy Regulatory Board, Kalpakkam - 603102, India
| | - P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India.
| |
Collapse
|
21
|
Sperling JM, Warzecha E, Klamm BE, Gaiser AN, Windorff CJ, Whitefoot MA, Albrecht-Schönzart TE. Pronounced Pressure Dependence of Electronic Transitions for Americium Compared to Isomorphous Neodymium and Samarium Mellitates. Inorg Chem 2021; 60:476-483. [PMID: 33325231 DOI: 10.1021/acs.inorgchem.0c03293] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mellitate ion is relevant in spent nuclear fuel processing and is utilized as a surrogate for studying the interactions of f elements with humic acids. A wealth of different coordination modes gives the potential for diverse structural chemistry across the actinide series. In this study, an americium mellitate, 243Am2[(C6(COO-)6](H2O)8·2H2O (1-Am), has been synthesized and characterized using structural analysis and spectroscopy at ambient and elevated pressures. 1-Am was then compared to isomorphous neodymium (1-Nd) and samarium (1-Sm) mellitates via bond-length analysis and pressure dependence of their Laporte-forbidden f → f transitions. Results show that the pressure dependence of the f → f transitions of 1-Am is significantly greater than that observed in 1-Nd and 1-Sm, with average shifts of 21.4, 4.7, and 3.6 cm-1/GPa, respectively. This greater shift found in 1-Am shows further evidence that the 5f orbitals are more affected than the 4f orbitals when pressure is applied to isostructural compounds.
Collapse
Affiliation(s)
- Joseph M Sperling
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Evan Warzecha
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Bonnie E Klamm
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Alyssa N Gaiser
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Cory J Windorff
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Megan A Whitefoot
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| |
Collapse
|
22
|
Zhang P, Liu H, Zou W, Zhang P, Hu SX. Relativistic Effects Stabilize the Planar Wheel-like Structure of Actinide-Doped Gold Clusters: An@Au 7 (An = Th to Cm). J Phys Chem A 2020; 124:8173-8183. [PMID: 32845148 DOI: 10.1021/acs.jpca.0c02148] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite the chemistry of actinide-ligand bonding is continuing and of burgeoning interest, investigations of the chemical bonding of bimetallic complexes involving transuranics remain relatively less, and there are rarely studies on the bonding features between actinide and coinage metals (CM). We present a systematic research on the series of An@Au7 (An = Th to Cm), UCM7 (CM = Cu, Ag, Au), and WAu7 clusters to investigate the unique geometries, electronic structures, and chemical bonding between An 5f6d orbitals and CM ns orbitals, and to find their periodicity across the actinides and within the group of transition metals. A unique planar wheel-like structure for An@Au7 clusters with the help of actinide metals encapsulation via spin-orbit coupling, resulting in An(III). Instead, the transition-metal (TM) element W retains its usual six-gold-coordination structure in WAu7, thus forcing the seventh Au out of plane. The An-CM interactions, depending on the ion radii, become stronger with the increase of the atomic number of the actinide metals, as well as the CM. These results show that the presence of actinides in clusters can lead to unique electronic and geometrical structures.
Collapse
Affiliation(s)
- Peng Zhang
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Haitao Liu
- Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - Wenli Zou
- Institute of Modern Physics, Northwest University and Shaanxi Key Laboratory for Theoretical Physics Frontiers, Xi'an 710127, China
| | - Ping Zhang
- Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - Shu-Xian Hu
- Beijing Computational Science Research Center, Beijing 100193, China
| |
Collapse
|
23
|
Geist A, Adnet JM, Bourg S, Ekberg C, Galán H, Guilbaud P, Miguirditchian M, Modolo G, Rhodes C, Taylor R. An overview of solvent extraction processes developed in Europe for advanced nuclear fuel recycling, part 1 — heterogeneous recycling. SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2020.1795680] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Andreas Geist
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), Karlsruhe, Germany
| | - Jean-Marc Adnet
- French Alternative Energies and Atomic Energy Commission, CEA/DES/ISEC/DMRC, University of Montpellier, Marcoule, France
| | - Stéphane Bourg
- French Alternative Energies and Atomic Energy Commission, CEA/DES/ISEC/DMRC, University of Montpellier, Marcoule, France
| | - Christian Ekberg
- Nuclear Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Hitos Galán
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - Philippe Guilbaud
- French Alternative Energies and Atomic Energy Commission, CEA/DES/ISEC/DMRC, University of Montpellier, Marcoule, France
| | - Manuel Miguirditchian
- French Alternative Energies and Atomic Energy Commission, CEA/DES/ISEC/DMRC, University of Montpellier, Marcoule, France
| | - Giuseppe Modolo
- Forschungszentrum Jülich GmbH (FZJ), Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Chris Rhodes
- National Nuclear Laboratory, Central Laboratory, Seascale, UK
| | - Robin Taylor
- National Nuclear Laboratory, Central Laboratory, Seascale, UK
| |
Collapse
|
24
|
Hu SX, Qin J, Zhang P, Shuai MB, Zhang P. Theoretical Insight into Coordination Chemistry of Am(VI) and Am(V) with Phenanthroline Ligand: Implications for High Oxidation State Based Minor Actinide Separation. Inorg Chem 2020; 59:6338-6350. [PMID: 32286060 DOI: 10.1021/acs.inorgchem.0c00452] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite continuing and burgeoning interest in americium (Am) coordination chemistry in recent years, investigations of the electronic structures and bonding chemistry of high oxidation state americium complexes and their implications for minor actinide separation remain relatively less explored to date. Here, we used density functional theory (DFT) to create high oxidation states of americium but experimentally feasible models of Am(V) and Am(VI) complexes of phenanthroline ligand (DAPhen) as [AmO2(L)]1+/2+ and [AmO3(L)]1+ (L = 2,9-bis[(N,N-dimethyl)-carbonyl]-1,10-phenanthroline (oxo-DAPhen, LO) and 2,9-bis[(N,N-dimethyl)-thio-carbonyl]-1,10-phenanthroline (thio-DAPhen, LS)), meanwhile comparing these with [UO2(L)]2+. On the basis of the calculations, the Am(V) and Am(VI) oxidation state are thermodynamically feasible and can be stabilized by DAPhen ligands. From a comparative study, the strength of thio-DAPhen in the separation of high oxidation state Am emerges better than does oxo-DAPhen, which relates to the nature, energy level, and spatial arrangement of their frontier orbitals. This study provides fundamental knowledge toward understanding the transuranic separations processes, which has implications in designing new, more selective extraction processes for the separation of Am from curium (Cm) as well as lanthanide.
Collapse
Affiliation(s)
- Shu-Xian Hu
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Jianwei Qin
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China
| | - Peng Zhang
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Mao-Bing Shuai
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China
| | - Ping Zhang
- Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| |
Collapse
|
25
|
Assefa MK, Wu G, Hayton TW. Uranyl Oxo Silylation Promoted by Silsesquioxane Coordination. J Am Chem Soc 2020; 142:8738-8747. [PMID: 32292028 DOI: 10.1021/jacs.0c00990] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Mikiyas K. Assefa
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Trevor W. Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| |
Collapse
|
26
|
Einkauf JD, Burns JD. Recovery of Oxidized Actinides, Np(VI), Pu(VI), and Am(VI), from Cocrystallized Uranyl Nitrate Hexahydrate: A Single Technology Approach to Used Nuclear Fuel Recycling. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jeffrey D. Einkauf
- Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831, United States
| | - Jonathan D. Burns
- Nuclear Engineering and Science Center, Texas A&M University, College Station, Texas 77843, United States
| |
Collapse
|
27
|
Einkauf JD, Burns JD. Solid state characterization of oxidized actinides co-crystallized with uranyl nitrate hexahydrate. Dalton Trans 2020; 49:608-612. [DOI: 10.1039/c9dt04000e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Characterization of the penta- and hexavalent dioxo cations of NpO2+, NpO22+, PuO22+, and AmO22+ has been carried out by diffuse reflectance UV-Vis-NIR spectroscopy, with the first observations of NpO2+, NpO22+, and AmO22+ in the solid state.
Collapse
Affiliation(s)
- Jeffrey D. Einkauf
- Center for Nuclear Security Science & Policy Initiatives
- Texas A&M University
- College Station
- USA
| | - Jonathan D. Burns
- Nuclear Engineering and Science Center
- Texas A&M University
- College Station
- USA
| |
Collapse
|
28
|
Wang CZ, Lan JH, Wu QY, Chai ZF, Shi WQ. Theoretical insights on the complexation of Am(III) and Cm(III) with amide-type ligands. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06804-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
29
|
Biswas S, Edwards SJ, Wang Z, Si H, Vintró LL, Twamley B, Kowalski PM, Baker RJ. Americium incorporation into studtite: a theoretical and experimental study. Dalton Trans 2019; 48:13057-13063. [PMID: 31407762 DOI: 10.1039/c9dt02848j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Studtite, [UO2(η2-O2)(H2O)2]·2H2O, and metastudtite, [UO2(η2-O2)(H2O)2], are important phase alterations of UO2 in a spent nuclear fuel repository and have previously been shown to react with Np(v). In this work we extend the study to Am(v) on a tracer scale and show spectroscopic evidence that the Am is incorporated into the structure of studtite as Am(iii). A computational study on the possible mechanisms for the incorporation of Np and Am shows that protonation of the -yl oxygen is the favoured route and the calculated incorporation energies are large and positive. The results suggest that Am is less favoured compared to Np but energetically more favoured to incorporate both actinide ions into metastudtite rather than studtite. Finally, we have shown that once incorporated, Am readily leaches into water but spectroscopic measurements suggest subtle changes in the structure of studtite.
Collapse
Affiliation(s)
- Saptarshi Biswas
- School of Chemistry, University of Dublin Trinity College, Dublin 2, Ireland.
| | - Samuel J Edwards
- School of Chemistry, University of Dublin Trinity College, Dublin 2, Ireland.
| | - Zheming Wang
- Pacific Northwest National Laboratory, MSIN K8-96, P.O. Box 999, Richland, WA 99352, USA
| | - Hang Si
- Institute of Energy and Climate Research, IEK-6: Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse, 52428 Jülich, Germany.
| | - Luis León Vintró
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - Brendan Twamley
- School of Chemistry, University of Dublin Trinity College, Dublin 2, Ireland.
| | - Piotr M Kowalski
- Institute of Energy and Climate Research, IEK-6: Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse, 52428 Jülich, Germany.
| | - Robert J Baker
- School of Chemistry, University of Dublin Trinity College, Dublin 2, Ireland.
| |
Collapse
|
30
|
Grimes TS, Heathman CR, Jansone-Popova S, Ivanov AS, Bryantsev VS, Zalupski PR. Exploring Soft Donor Character of the N-2-Pyrazinylmethyl Group by Coordinating Trivalent Actinides and Lanthanides Using Aminopolycarboxylates. Inorg Chem 2019; 59:138-150. [DOI: 10.1021/acs.inorgchem.9b01427] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Travis S. Grimes
- Aqueous Separations and Radiochemistry, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Colt R. Heathman
- Aqueous Separations and Radiochemistry, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Santa Jansone-Popova
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alexander S. Ivanov
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Vyacheslav S. Bryantsev
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Peter R. Zalupski
- Aqueous Separations and Radiochemistry, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| |
Collapse
|
31
|
Marie C, Kaufholz P, Vanel V, Duchesne MT, Russello E, Faroldi F, Baldini L, Casnati A, Wilden A, Modolo G, Miguirditchian M. Development of a Selective Americium Separation Process Using H4TPAEN as Water-Soluble Stripping Agent. SOLVENT EXTRACTION AND ION EXCHANGE 2019. [DOI: 10.1080/07366299.2019.1643569] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Cécile Marie
- CEA, DEN, Research Department on Mining and Fuel Recycling Processes (DMRC), SPDS, LCPE, Bagnols-sur-Cèze cedex, France
| | - Peter Kaufholz
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Vincent Vanel
- CEA, DEN, Research Department on Mining and Fuel Recycling Processes (DMRC), SPDS, LCPE, Bagnols-sur-Cèze cedex, France
| | - Marie-Thérèse Duchesne
- CEA, DEN, Research Department on Mining and Fuel Recycling Processes (DMRC), SPDS, LCPE, Bagnols-sur-Cèze cedex, France
| | - Emilie Russello
- CEA, DEN, Research Department on Mining and Fuel Recycling Processes (DMRC), SPDS, LCPE, Bagnols-sur-Cèze cedex, France
| | - Federica Faroldi
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università degli Studi di Parma, Parma, Italy
| | - Laura Baldini
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università degli Studi di Parma, Parma, Italy
| | - Alessandro Casnati
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università degli Studi di Parma, Parma, Italy
| | - Andreas Wilden
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Giuseppe Modolo
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Manuel Miguirditchian
- CEA, DEN, Research Department on Mining and Fuel Recycling Processes (DMRC), SPDS, LCPE, Bagnols-sur-Cèze cedex, France
| |
Collapse
|
32
|
Horne GP, Grimes TS, Bauer WF, Dares CJ, Pimblott SM, Mezyk SP, Mincher BJ. Effect of Ionizing Radiation on the Redox Chemistry of Penta- and Hexavalent Americium. Inorg Chem 2019; 58:8551-8559. [PMID: 31184869 DOI: 10.1021/acs.inorgchem.9b00854] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The recent development of facile methods to oxidize trivalent americium to its higher valence states holds promise for the discovery of new chemistries and critical insight into the behavior of the 5f electrons. However, progress in understanding high-valent americium chemistry has been hampered by americium's inherent ionizing radiation field and its concomitant effects on americium redox chemistry. Any attempt to understand high-valent americium reduction and/or disproportionation must account for the effects of these radiolytic processes. Therefore, we present a complete, quantitative, mechanistic description of the radiation-induced redox chemistry of the americyl oxidation states in aerated, aqueous nitric acid, as a function of radiation quality (type and energy) and solution composition using multiscale modeling calculations supported by experiment. The reduction of Am(VI) to Am(V) was found to be most sensitive to the effects of ionizing radiation, undergoing rapid reductions with the steady-state products of aqueous HNO3 radiolysis, i.e., HNO2, H2O2, and HO2•, which dictated its practical lifetime under acidic conditions. In contrast, Am(V) is only susceptible to radiolytic oxidation, mainly through its reactions with NO3•, and is notably radiation-resistant with respect to direct one-electron reduction to produce Am(IV). Our multiscale modeling calculations predict that the lifetime of Am(V) is dictated by its rate of disproportionation, 2AmO2+ + 4Haq+ → AmO22+ + Am4+ + 2H2O, with a fourth-order dependence on [Haq+] in agreement with previous experimental findings, giving an optimized rate coefficient of k = 2.27 × 10-6 M-5 s-1. This disproportionation initially produces Am(IV) and Am(VI) species, but the lack of any spectroscopic evidence in our study for Am(IV) suggests that solvent reduction of this cation occurs rapidly. The ultimate product of all the Am(VI)/Am(V) irradiations is Am(III), which shows great stability in an irradiation field.
Collapse
Affiliation(s)
| | | | | | - Christopher J Dares
- Department of Chemistry , Florida International University , Miami , Florida 33199 , United States
| | | | - Stephen P Mezyk
- Department of Chemistry and Biochemistry , California State University Long Beach , 1250 Bellflower Boulevard , Long Beach California 90840-9507 , United States
| | | |
Collapse
|
33
|
Malmbeck R, Magnusson D, Bourg S, Carrott M, Geist A, Hérès X, Miguirditchian M, Modolo G, Müllich U, Sorel C, Taylor R, Wilden A. Homogenous recycling of transuranium elements from irradiated fast reactor fuel by the EURO-GANEX solvent extraction process. RADIOCHIM ACTA 2019. [DOI: 10.1515/ract-2018-3089] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The EURO-GANEX process was developed for co-separating transuranium elements from irradiated nuclear fuels. A hot flow-sheet trial was performed in a counter-current centrifugal contactor setup, using a genuine high active feed solution. Irradiated mixed (carbide, nitride) U80Pu20 fast reactor fuel containing 20 % Pu was thermally treated to oxidise it to the oxide form which was then dissolved in HNO3. From this solution uranium was separated to >99.9 % in a primary solvent extraction cycle using 1.0 mol/L DEHiBA (N,N-di(2-ethylhexyl)isobutyramide in TPH (hydrogenated tetrapropene) as the organic phase. The raffinate solution from this process, containing 10 g/L Pu, was further processed in a second cycle of solvent extraction. In this EURO-GANEX flow-sheet, TRU and fission product lanthanides were firstly co-extracted into a solvent composed of 0.2 mol/L TODGA (N,N,N′,N′-tetra-n-octyl diglycolamide) and 0.5 mol/L DMDOHEMA (N,N′-dimethyl-N,N′-dioctyl-2-(2-hexyloxy-ethyl) malonamide) dissolved in Exxsol D80, separating them from most other fission and corrosion products. Subsequently, the TRU were selectively stripped from the collected loaded solvent using a solution containing 0.055 mol/L SO3-Ph-BTP (2,6-bis(5,6-di(3-sulphophenyl)-1,2,4-triazin-3-yl)pyridine tetrasodium salt) and 1 mol/L AHA (acetohydroxamic acid) in 0.5 mol/L HNO3; lanthanides were finally stripped using 0.01 mol/L HNO3. Approximately 99.9 % of the TRU and less than 0.1 % of the lanthanides were found in the product solution, which also contained the major fractions of Zr and Mo.
Collapse
Affiliation(s)
- Rikard Malmbeck
- European Commission, DG Joint Research Centre, Directorate G , Karlsruhe , Germany
| | - Daniel Magnusson
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) , Karlsruhe , Germany
| | - Stéphane Bourg
- French Alternative Energies and Atomic Energy Commission, Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, CEA Marcoule , Bagnols sur Cèze , France
| | - Michael Carrott
- National Nuclear Laboratory, Central Laboratory , Sellafield, Seascale, CA20 1PG , UK
| | - Andreas Geist
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) , Karlsruhe , Germany
| | - Xavier Hérès
- French Alternative Energies and Atomic Energy Commission, Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, CEA Marcoule , Bagnols sur Cèze , France
| | - Manuel Miguirditchian
- French Alternative Energies and Atomic Energy Commission, Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, CEA Marcoule , Bagnols sur Cèze , France
| | - Giuseppe Modolo
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung – Nukleare Entsorgung und Reaktorsicherheit , Jülich , Germany
| | - Udo Müllich
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) , Karlsruhe , Germany
| | - Christian Sorel
- French Alternative Energies and Atomic Energy Commission, Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, CEA Marcoule , Bagnols sur Cèze , France
| | - Robin Taylor
- National Nuclear Laboratory, Central Laboratory , Sellafield, Seascale, CA20 1PG , UK
| | - Andreas Wilden
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung – Nukleare Entsorgung und Reaktorsicherheit , Jülich , Germany
| |
Collapse
|
34
|
Effective separation of Am(III) and Cm(III) using a DGA resin via the selective oxidation of Am(III) to Am(V). J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06571-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
35
|
Götzke L, Schaper G, März J, Kaden P, Huittinen N, Stumpf T, Kammerlander KK, Brunner E, Hahn P, Mehnert A, Kersting B, Henle T, Lindoy LF, Zanoni G, Weigand JJ. Coordination chemistry of f-block metal ions with ligands bearing bio-relevant functional groups. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
36
|
Wilden A, Kowalski PM, Klaß L, Kraus B, Kreft F, Modolo G, Li Y, Rothe J, Dardenne K, Geist A, Leoncini A, Huskens J, Verboom W. Unprecedented Inversion of Selectivity and Extraordinary Difference in the Complexation of Trivalent f Elements by Diastereomers of a Methylated Diglycolamide. Chemistry 2019; 25:5507-5513. [PMID: 30720905 DOI: 10.1002/chem.201806161] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/05/2019] [Indexed: 11/10/2022]
Abstract
When considering f elements, solvent extraction is primarily used for the removal of lanthanides from ore and their recycling, as well as for the separation of actinides from used nuclear fuel. Understanding the complexation mechanism of metal ions with organic extractants, particularly the influence of their molecular structure on complex formation is of fundamental importance. Herein, we report an extraordinary (up to two orders of magnitude) change in the extraction efficiency of f elements with two diastereomers of dimethyl tetraoctyl diglycolamide (Me2 -TODGA), which only differ in the orientation of a single methyl group. Solvent extraction techniques, extended X-ray absorption fine structure (EXAFS) measurements, and density functional theory (DFT) based ab initio calculations were used to understand their complex structures and to explain their complexation mechanism. We show that the huge differences observed in extraction selectivity results from a small change in the complexation of nitrate counter-ions caused by the different orientation of one methyl group in the backbone of the extractant. The obtained results give a significant new insight into metal-ligand complexation mechanisms, which will promote the development of more efficient separation techniques.
Collapse
Affiliation(s)
- Andreas Wilden
- Institut für Energie- und Klimaforschung-Nukleare Entsorgung, und Reaktorsicherheit- (IEK-6), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse 1, 52428, Jülich, Germany.,JARA High-Performance Computing, Schinkelstrasse 2, 52062, Aachen, Germany
| | - Piotr M Kowalski
- Institut für Energie- und Klimaforschung-Nukleare Entsorgung, und Reaktorsicherheit- (IEK-6), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse 1, 52428, Jülich, Germany.,JARA High-Performance Computing, Schinkelstrasse 2, 52062, Aachen, Germany
| | - Larissa Klaß
- Institut für Energie- und Klimaforschung-Nukleare Entsorgung, und Reaktorsicherheit- (IEK-6), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse 1, 52428, Jülich, Germany.,JARA High-Performance Computing, Schinkelstrasse 2, 52062, Aachen, Germany
| | - Benjamin Kraus
- Institut für Energie- und Klimaforschung-Nukleare Entsorgung, und Reaktorsicherheit- (IEK-6), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse 1, 52428, Jülich, Germany.,JARA High-Performance Computing, Schinkelstrasse 2, 52062, Aachen, Germany
| | - Fabian Kreft
- Institut für Energie- und Klimaforschung-Nukleare Entsorgung, und Reaktorsicherheit- (IEK-6), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse 1, 52428, Jülich, Germany.,JARA High-Performance Computing, Schinkelstrasse 2, 52062, Aachen, Germany
| | - Giuseppe Modolo
- Institut für Energie- und Klimaforschung-Nukleare Entsorgung, und Reaktorsicherheit- (IEK-6), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse 1, 52428, Jülich, Germany.,JARA High-Performance Computing, Schinkelstrasse 2, 52062, Aachen, Germany
| | - Yan Li
- Institut für Energie- und Klimaforschung-Nukleare Entsorgung, und Reaktorsicherheit- (IEK-6), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Strasse 1, 52428, Jülich, Germany.,JARA High-Performance Computing, Schinkelstrasse 2, 52062, Aachen, Germany
| | - Jörg Rothe
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), 76021, Karlsruhe, Germany
| | - Kathy Dardenne
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), 76021, Karlsruhe, Germany
| | - Andreas Geist
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), 76021, Karlsruhe, Germany
| | - Andrea Leoncini
- Laboratory of Molecular Nanofabrication, Mesa+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE, Enschede, The Netherlands
| | - Jurriaan Huskens
- Laboratory of Molecular Nanofabrication, Mesa+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE, Enschede, The Netherlands
| | - Willem Verboom
- Laboratory of Molecular Nanofabrication, Mesa+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE, Enschede, The Netherlands
| |
Collapse
|
37
|
Lopez MJ, Sheridan MV, McLachlan JR, Grimes TS, Dares CJ. Electrochemical oxidation of trivalent americium using a dipyrazinylpyridine modified ITO electrode. Chem Commun (Camb) 2019; 55:4035-4038. [PMID: 30887982 DOI: 10.1039/c9cc00837c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present here the electrochemical oxidation of Am(iii) to AmVO2+ and AmVIO22+ in pH 1 nitric acid using a mesoporous tin-doped indium oxide electrode modified with a covalently attached dipyrazinylpyridine ligand. The applied potential affects the distribution of Am oxidation products. At potential 1.8 V, only Am(v) is observed, while increasing the potential to as much as 2.0 V, results in oxidation of Am(iii) to Am(v) and subsequent oxidation of Am(v) to Am(vi). At applied potentials >2.0 V, Am(iii) is oxidized to Am(v), while Am(vi) is reduced to Am(v). The latter reduction reaction is likely due to the increased rate of hydrogen peroxide formation from the 2-electron oxidation of water at the electrode at these high potentials. The development of future ligand modified electrodes for actinide oxidations must consider how they facilitate Am oxidations while disfavoring unwanted or competing reactions.
Collapse
Affiliation(s)
- Michael J Lopez
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th St., Miami, FL 33199, USA.
| | | | | | | | | |
Collapse
|
38
|
Yu J, Ma J, Yang C, Yu H. Binding affinity of pyridines with Am III/Cm III elucidated by density functional theory calculations. Dalton Trans 2019; 48:1613-1623. [PMID: 30629054 DOI: 10.1039/c8dt04669g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In recent decades, N-heterocyclic ligands have been extensively used in the separation of lanthanides/actinides, whereas the selective extraction of amercium or curium has been very challenging. Using density functional theory calculations, this study is devoted to the investigation of the binding affinity of a series of modelling pyridine ligands with AmIII and CmIII. The structure-property correlations between the amercium and curium systems and the binding affinity were obtained, and promising strategies for efficient separation of AmIII/CmIII were proposed.
Collapse
Affiliation(s)
- Jie Yu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, PR China.
| | - Jun Ma
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China.
| | - Chuting Yang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China.
| | - Haizhu Yu
- Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, PR China.
| |
Collapse
|
39
|
Nakase M, Kobayashi T, Shiwaku H, Suzuki S, Grimes TS, Mincher BJ, Yaita T. Relationship Between Structure and Coordination Strength of N and N,O-Hybrid Donor Ligands with Trivalent Lanthanides. SOLVENT EXTRACTION AND ION EXCHANGE 2019. [DOI: 10.1080/07366299.2018.1532137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Masahiko Nakase
- Aqueous Separation and Radiochemistry Department, Idaho National Laboratory, Idaho Falls, Idaho, USA
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| | - Tohru Kobayashi
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| | - Hideaki Shiwaku
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| | - Shinichi Suzuki
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| | - Travis S. Grimes
- Aqueous Separation and Radiochemistry Department, Idaho National Laboratory, Idaho Falls, Idaho, USA
| | - Bruce J. Mincher
- Aqueous Separation and Radiochemistry Department, Idaho National Laboratory, Idaho Falls, Idaho, USA
| | - Tsuyoshi Yaita
- Actinide Chemistry Group, Japan Atomic Energy Agency, Hyogo, Japan
| |
Collapse
|
40
|
Einkauf JD, Wilcox AJ, Burns JD. Solubility and Complexation of the Bismuthate Ion in Nitric Acid Systems. Inorg Chem 2018; 57:15341-15349. [PMID: 30475603 DOI: 10.1021/acs.inorgchem.8b02672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dissolution rate and solubility of NaBiO3 have been investigated in nitric acid systems ranging from 4 to 6 M HNO3 and were found to be 58-76 μg/cm2·d and 490-830 mM, respectively. The presence of 50 mM U(VI) drastically increased the solubility to 540-1200 mM, while rates of dissolution were relatively unchanged. The solubility of NaBiO3 increased with an increase in U(VI) concentrations at 4 M HNO3, with log-log analysis indicating a one-to-one complex between Bi and U and infrared spectroscopic evidence monitoring uranyl stretching, suggesting complex formation. Absorbance spectra were obtained experimentally and computationally with an absorbance band in the range of 450-600 nm that has been attributed to Bi(V). The ingrowth and decay of Bi(V) in solution was also studied as a function of mass of solid NaBiO3 present, acidity, and temperature. The activation energies of dissolution and decomposition were calculated to be 39 ± 4 and 61 ± 6 kJ/mol, respectively. These results indicate that dissolution of NaBiO3 into the respective Na+ and BiO3-occurs prior to undergoing reduction, a process which conventionally has been believed to occur in the reverse order.
Collapse
|
41
|
Burns JD, Clearfield A. Kinetics of Ion Exchange of Zr/Sn(IV) Phosphonate–Phosphate Hybrid Materials for Separation of Lanthanides from Oxidized Actinides. SOLVENT EXTRACTION AND ION EXCHANGE 2018. [DOI: 10.1080/07366299.2018.1542971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Jonathan D. Burns
- Center for Nuclear Security Science & Policy Initiatives, Texas A&M University, College Station, TX, USA
| | | |
Collapse
|
42
|
Oxidation and extraction of Am(VI) using a monoamidic extractant in 3D printed centrifugal contactors. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-6126-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
43
|
Criticality concerns of a group actinide co-crystallization separations approach to used nuclear fuel recycling. ANN NUCL ENERGY 2018. [DOI: 10.1016/j.anucene.2018.02.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
44
|
Pérez-Conesa S, Martínez JM, Pappalardo RR, Sánchez Marcos E. Extracting the Americyl Hydration from an Americium Cationic Mixture in Solution: A Combined X-ray Absorption Spectroscopy and Molecular Dynamics Study. Inorg Chem 2018; 57:8089-8097. [DOI: 10.1021/acs.inorgchem.8b00164] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sergio Pérez-Conesa
- Department of Physical Chemistry, University of Seville, 41012 Seville, Spain
| | - José M. Martínez
- Department of Physical Chemistry, University of Seville, 41012 Seville, Spain
| | | | | |
Collapse
|
45
|
McSkimming A, Su J, Cheisson T, Gau MR, Carroll PJ, Batista ER, Yang P, Schelter EJ. Coordination Chemistry of a Strongly-Donating Hydroxylamine with Early Actinides: An Investigation of Redox Properties and Electronic Structure. Inorg Chem 2018; 57:4387-4394. [DOI: 10.1021/acs.inorgchem.7b03238] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Alex McSkimming
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Jing Su
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Michael R. Gau
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Enrique R. Batista
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
46
|
Lewis FW, Harwood LM, Hudson MJ, Afsar A, Laventine DM, Šťastná K, John J, Distler P. Separation of the Minor Actinides Americium(III) and Curium(III) by Hydrophobic and Hydrophilic BTPhen ligands: Exploiting Differences in their Rates of Extraction and Effective Separations at Equilibrium. SOLVENT EXTRACTION AND ION EXCHANGE 2018. [DOI: 10.1080/07366299.2018.1429358] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Frank W. Lewis
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, UK
| | | | - Michael J. Hudson
- Department of Chemistry, University of Reading, Whiteknights, Reading, UK
| | - Ashfaq Afsar
- Department of Chemistry, University of Reading, Whiteknights, Reading, UK
| | | | - Kamila Šťastná
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
| | - Jan John
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
| | - Petr Distler
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
| |
Collapse
|
47
|
Dau PD, Vasiliu M, Peterson KA, Dixon DA, Gibson JK. Remarkably High Stability of Late Actinide Dioxide Cations: Extending Chemistry to Pentavalent Berkelium and Californium. Chemistry 2017; 23:17369-17378. [DOI: 10.1002/chem.201704193] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Phuong D. Dau
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| | - Monica Vasiliu
- Department of Chemistry The University of Alabama Shelby Hall Tuscaloosa Alabama 35487-0336 USA
| | - Kirk A. Peterson
- Department of Chemistry Washington State University Pullman WA 99164-4630 USA
| | - David A. Dixon
- Department of Chemistry The University of Alabama Shelby Hall Tuscaloosa Alabama 35487-0336 USA
| | - John K. Gibson
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| |
Collapse
|
48
|
Direct separation of minor actinides from high level liquid waste by Me 2 -CA-BTP/SiO 2-P adsorbent. Sci Rep 2017; 7:14679. [PMID: 29089628 PMCID: PMC5665906 DOI: 10.1038/s41598-017-14758-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 10/04/2017] [Indexed: 11/22/2022] Open
Abstract
Directly separating minor actinides (MA: Am, Cm, etc.) from high level liquid waste (HLLW) containing lanthanides and other fission products is of great significance for the whole nuclear fuel cycle, especially in the aspects of reducing long-term radioactivity and simplifying the post-processing separation process. Herein, a novel silica-based adsorbent Me2-CA-BTP/SiO2-P was prepared by impregnating Me2-CA-BTP (2,6-bis(5,6,7,8-tetrahydro-5,8,9,9-tetramethyl-5,8-methano-1,2,4-benzotriazin-3-yl)pyridine) into porous silica/polymer support particles (SiO2-P) under reduced pressure. It was found Me2-CA-BTP/SiO2-P exhibited good adsorption selectivity towards 241Am(III) over 152Eu(III) in a wide nitric acid range, acceptable adsorption kinetic, adequate stability against γ irradiation in 1 and 3 M HNO3 solutions, and successfully separated 241Am(III) from simulated 3 M HNO3 HLLW. In sum, considering the good overall performance of Me2-CA-BTP/SiO2-P adsorbent, it has great application potential for directly separating MA from HLLW, and is expected to establish an advanced simplified MA separation process, which is very meaningful for the development of nuclear energy.
Collapse
|
49
|
Grimes TS, Horne GP, Dares CJ, Pimblott SM, Mezyk SP, Mincher BJ. Kinetics of the Autoreduction of Hexavalent Americium in Aqueous Nitric Acid. Inorg Chem 2017; 56:8295-8301. [DOI: 10.1021/acs.inorgchem.7b00990] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Travis S. Grimes
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415, United States
| | - Gregory P. Horne
- California State University at Long Beach, Long Beach, California 90804, United States
- Radiation
Research Laboratory, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | | | - Simon M. Pimblott
- Dalton
Cumbrian Facility, Westlakes Science and Technology Park, The University of Manchester, Cumbria CA24 3HA, United Kingdom
- School of
Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Stephen P. Mezyk
- California State University at Long Beach, Long Beach, California 90804, United States
| | - Bruce J. Mincher
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415, United States
| |
Collapse
|
50
|
McCann K, Mincher BJ, Schmitt NC, Braley JC. Hexavalent Actinide Extraction Using N,N-Dialkyl Amides. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01181] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kevin McCann
- Colorado School
of Mines, Golden, Colorado 80401, United States
| | - Bruce J. Mincher
- Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | | | | |
Collapse
|