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Kruse S, Rajapaksha H, LaVerne J, Mason S, Forbes T. Radiation-Induced Defects in Uranyl Trinitrate Solids. Chemistry 2024:e202400956. [PMID: 38619503 DOI: 10.1002/chem.202400956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 04/16/2024]
Abstract
Actinides are inherently radioactive; thus, ionizing radiation is emitted by these elements can have profound effects on its surrounding chemical environment through the formation of free radical species. While previous work has noted that the presence of free radicals in the system impacts the redox state of the actinides, there is little atomistic understanding of how these metal cations interact with free radicals. Herein, we explore the effects of radiation (UV and γ) on three U(VI) trinitrate complexes, M[UO2(NO3)3] (where M = K+, Rb+, Cs+), and their respective nitrate salts in the solid state via electron paramagnetic resonance (EPR) and Raman spectroscopy paired with Density Functional Theory (DFT) methods. We find that the alkali salts form nitrate radicals under UV and γ irradiation, but also note the presence of additional degradation products. M[UO2(NO3)3] solids also form nitrate radicals and additional DFT calculations indicate the species corresponds to a change from the bidentate bound nitrate anion into a monodentate NO3• radical. Computational studies also highlight the need to include the second sphere coordination environment around the [UO2(NO3)3]0,1 species to gain agreement between the experimental and predicted EPR signatures.
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Affiliation(s)
- Samantha Kruse
- The University of Iowa, Chemistry, 230 N Madison St, 52240, Iowa City, UNITED STATES
| | | | - Jay LaVerne
- University of Notre Dame, Physics and Astronomy, UNITED STATES
| | - Sara Mason
- Brookhaven National Laboratory, Center for Functional Nanomaterials, UNITED STATES
| | - Tori Forbes
- University of Iowa, Department of Chemistry, Chemistry Building W374, 52242, Iowa City, UNITED STATES
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Zhao Y, Guo Q, Xue S, Chen P, Zhao Q, Liu L, Hlushko H, LaVerne J, Pearce CI, Miao A, Wang Z, Rosso KM, Zhang X. Correction to "Effect of Adsorbed Carboxylates on the Dissolution of Boehmite Nanoplates in Highly Alkaline Solutions". Environ Sci Technol 2024. [PMID: 38305200 DOI: 10.1021/acs.est.4c00898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
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Zhao Y, Guo Q, Xue S, Chen P, Zhao Q, Liu L, Hlushko H, LaVerne J, Pearce CI, Miao A, Wang Z, Rosso KM, Zhang X. Effect of Adsorbed Carboxylates on the Dissolution of Boehmite Nanoplates in Highly Alkaline Solutions. Environ Sci Technol 2024; 58:2017-2026. [PMID: 38214482 DOI: 10.1021/acs.est.3c06595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Understanding the dissolution of boehmite in highly alkaline solutions is important to processing complex nuclear waste stored at the Hanford (WA) and Savannah River (SC) sites in the United States. Here, we report the adsorption of model carboxylates on boehmite nanoplates in alkaline solutions and their effects on boehmite dissolution in 3 M NaOH at 80 °C. Although expectedly lower than at circumneutral pH, adsorption of oxalate occurred at pH 13, with adsorption decreasing linearly to 3 M NaOH. Classical molecular dynamics simulations suggest that the adsorption of oxalate dianions onto the boehmite surface under high pH can occur through either inner- or outer-sphere complexation mechanisms depending on adsorption sites. However, both adsorption models indicate relatively weak binding, with an energy preference of 1.26 to 2.10 kcal/mol. By preloading boehmite nanoplates with oxalate or acetate, we observed suppression of dissolution rates by 23 or 10%, respectively, compared to pure solids. Scanning electron microscopy and transmission electron microscopy characterizations revealed no detectable difference in the morphologic evolution of the dissolving boehmite materials. We conclude that preadsorbed carboxylates can persist on boehmite surfaces, decreasing the density of dissolution-active sites and thereby adding extrinsic controls on dissolution rates.
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Affiliation(s)
- Yatong Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, China
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Qing Guo
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Sichuang Xue
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Ping Chen
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Qian Zhao
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Lili Liu
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Hanna Hlushko
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jay LaVerne
- Radiation Laboratory and Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Carolyn I Pearce
- Energy & Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Aijun Miao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, China
| | - Zheming Wang
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Kevin M Rosso
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xin Zhang
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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Dietz TC, Tomaszewski CE, Tsinas Z, Poster D, Barkatt A, Adel-Hadadi M, Bateman FB, Cumberland LT, Schneider E, Gaskell K, LaVerne J, Al-Sheikhly M. Uranium removal from seawater by means of polymeric fabrics grafted with diallyl oxalate through a single-step, solvent-free process. Ind Eng Chem Res 2016; 55:4179-5214. [PMID: 29720786 DOI: 10.1021/acs.iecr.5b03401] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In order to test the effectiveness of oxalate-based polymeric adsorbents in the recovery of uranium from seawater, diallyl oxalate (DAOx) was grafted onto nylon 6 fabrics by exposing the fabric, immersed in pure liquid DAOx or in a surfactant-stabilized dispersion of DAOx in water, to electron beam or gamma radiation. Following drying and weighing to determine the degree of grafting (DoG), the presence of oxalate in the fabrics was verified using XPS. Zeta potential measurements showed the fabric surfaces to be negatively charged. The fabrics were tested by rotating them for 7 days in a rotary agitator with actual seawater spiked with 0.2 or 1.0 mg∙L-1 uranium. The fraction of uranium in the solution which was removed due to uptake on the fabrics was found to rise with increasing DoG at both uranium concentrations. EDS measurements were used to map the distribution of adsorbed uranium on the polymeric fibers.
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Affiliation(s)
- Travis C Dietz
- Department of Materials Science and Engineering, Univ. of Maryland, College Park, MD 20742, USA
| | - Claire E Tomaszewski
- Department of Materials Science and Engineering, Univ. of Maryland, College Park, MD 20742, USA
| | - Zois Tsinas
- Department of Bioengineering, Univ. of Maryland, College Park, MD 20742, USA
| | - Dianne Poster
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Aaron Barkatt
- Department of Chemistry, The Catholic University of America, Washington, DC 20064, USA
| | - Mohammad Adel-Hadadi
- Department of Chemistry, The Catholic University of America, Washington, DC 20064, USA
| | - Fred B Bateman
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | | | - Erich Schneider
- Department of Nuclear & Radiation Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Karen Gaskell
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Jay LaVerne
- Department of Chemistry, Univ. of Maryland, College Park, MD 20742, USA
| | - Mohamad Al-Sheikhly
- Department of Materials Science and Engineering, Univ. of Maryland, College Park, MD 20742, USA
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El Omar AK, Schmidhammer U, Balcerzyk A, LaVerne J, Mostafavi M. Spur Reactions Observed by Picosecond Pulse Radiolysis in Highly Concentrated Bromide Aqueous Solutions. J Phys Chem A 2013; 117:2287-93. [DOI: 10.1021/jp312023r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Abdel Karim El Omar
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS, Université Paris-Sud 11, 91400 Orsay, France
| | - Uli Schmidhammer
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS, Université Paris-Sud 11, 91400 Orsay, France
| | - Anna Balcerzyk
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS, Université Paris-Sud 11, 91400 Orsay, France
| | - Jay LaVerne
- Radiation Laboratory and Department
of Physics, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS, Université Paris-Sud 11, 91400 Orsay, France
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El Omar AK, Schmidhammer U, Rousseau B, LaVerne J, Mostafavi M. Competition Reactions of H2O•+ Radical in Concentrated Cl– Aqueous Solutions: Picosecond Pulse Radiolysis Study. J Phys Chem A 2012; 116:11509-18. [DOI: 10.1021/jp309381z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Abdel Karim El Omar
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS/Université Paris—Sud 11, Orsay, France
| | - Uli Schmidhammer
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS/Université Paris—Sud 11, Orsay, France
| | - Bernard Rousseau
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS/Université Paris—Sud 11, Orsay, France
| | - Jay LaVerne
- Radiation
Laboratory and Department
of Physics, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS/Université Paris—Sud 11, Orsay, France
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Balcerzyk A, LaVerne J, Mostafavi M. Direct and Indirect Radiolytic Effects in Highly Concentrated Aqueous Solutions of Bromide. J Phys Chem A 2011; 115:4326-33. [DOI: 10.1021/jp2012528] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Balcerzyk
- Laboratoire de Chimie Physique, UMR 8000 CNRS/Université Paris-Sud 11, Faculté des Sciences d’Orsay, Bât. 349, 91405 Orsay Cedex, France
| | - Jay LaVerne
- Radiation Laboratory and Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique, UMR 8000 CNRS/Université Paris-Sud 11, Faculté des Sciences d’Orsay, Bât. 349, 91405 Orsay Cedex, France
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