1
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Aoyagi N, Motokawa R, Okumura M, Ueda Y, Saito T, Nishitsuji S, Taguchi T, Yomogida T, Sazaki G, Ikeda-Ohno A. Globular pattern formation of hierarchical ceria nanoarchitectures. Commun Chem 2024; 7:128. [PMID: 38867063 DOI: 10.1038/s42004-024-01199-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 05/13/2024] [Indexed: 06/14/2024] Open
Abstract
Dissipative structures often appear as an unstable counterpart of ordered structures owing to fluctuations that do not form a homogeneous phase. Even a multiphase mixture may simultaneously undergo one chemical reaction near equilibrium and another one that is far from equilibrium. Here, we observed in real time crystal seed formation and simultaneous nanocrystal aggregation proceeding from CeIV complexes to CeO2 nanoparticles in an acidic aqueous solution, and investigated the resultant hierarchical nanoarchitecture. The formed particles exhibited two very different size ranges, resulting in further pattern formation with opalescence. The hierarchically assembled structures in solutions were CeO2 colloids, viz. primary core clusters (1-3 nm) of crystalline ceria and secondary clusters (20-30 nm) assembled through surface ions. Such self-assembly is widespread in multi-component complex fluids, paradoxically moderating hierarchical reactions. Stability and instability are not only critical but also complementary for co-optimisation around the nearby free energy landscape prior to bifurcation.
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Affiliation(s)
- Noboru Aoyagi
- Advanced Science Research Centre (ASRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan.
| | - Ryuhei Motokawa
- Materials Sciences Research Centre (MSRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
| | - Masahiko Okumura
- Centre for Computational Science and e-Systems, JAEA, Kashiwa, Chiba, 277-0871, Japan
| | - Yuki Ueda
- Materials Sciences Research Centre (MSRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
| | - Takumi Saito
- Advanced Science Research Centre (ASRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
- Nuclear Professional School, School of Engineering, The University of Tokyo, Ibaraki, 319-1188, Japan
| | - Shotaro Nishitsuji
- Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata, 992-8510, Japan
| | - Tomitsugu Taguchi
- National Institutes for Quantum Science and Technology, Takasaki-shi, Gunma, 370-1292, Japan
| | - Takumi Yomogida
- Nuclear Science and Engineering Centre (NSEC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
| | - Gen Sazaki
- Institute of Low Temperature Science, Hokkaido University, Kita-ku, Sapporo, 060-0819, Japan
| | - Atsushi Ikeda-Ohno
- Advanced Science Research Centre (ASRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki, 319-1195, Japan
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2
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Donaher SE, Estes SL, Dunn RP, Gonzales AK, Powell BA, Martinez NE. Site- and species-specific metal concentrations, mobility, and bioavailability in sediment, flora, and fauna of a southeastern United States salt marsh. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 922:171262. [PMID: 38417525 DOI: 10.1016/j.scitotenv.2024.171262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 02/19/2024] [Accepted: 02/23/2024] [Indexed: 03/01/2024]
Abstract
Salt marshes are highly productive and valuable coastal ecosystems that act as filters for nutrients and pollutants at the land-sea interface. The salt marshes of the mid-Atlantic United States often exhibit geochemical behavior that varies significantly from other estuaries around the world, but our understanding of metal mobility and bioavailability remains incomplete for these systems. We sampled abiotic (water and sediment) and native biotic (three halophyte and two bivalve species) compartments of a southeastern United States salt marsh to understand the site- and species-specific metal concentrations, fractionation, and bioavailability for 16 metals and metalloids, including two naturally occurring radionuclides. Location on the marsh platform greatly influenced metal concentrations in sediment and metal bioaccumulation in halophytes, with sites above the mean high-water mark (i.e., high marsh zone) having lower concentrations in sediment but plants exhibiting greater biota sediment accumulation factors (BSAFs). Transition metal concentrations in the sediment were an average of 6× higher in the low marsh zone compared to the high marsh zone and heavy metals were on average 2× higher. Tissue- and species-specific preferential accumulation in bivalves provide opportunities for tailored biomonitoring programs. For example, mussel byssal threads accumulated ten of the sixteen studied elements to significantly greater concentrations compared to soft tissues and oysters had remarkably high soft tissue zinc concentrations (~5000 mg/kg) compared to all other species and element combinations studied. Additionally, some of our results have important implications for understanding metal mobility and implementing effective remediation (specifically phytoremediation) strategies, including observations that (1) heavy metals exhibit distinct concentration spatial distributions and metal fractionation patterns which vary from the transition metals and (2) sediment organic matter fraction appears to play an important role in controlling sediment metal concentrations, fractionation, and plant bioavailability.
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Affiliation(s)
- Sarah E Donaher
- Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA.
| | - Shanna L Estes
- Department of Chemistry, Clemson University, Anderson, SC 29625, USA; Center for Nuclear Environmental Engineering Sciences and Radioactive Waste Management (NEESRWM), Clemson, SC 29634, USA
| | - Robert P Dunn
- North Inlet-Winyah Bay National Estuarine Research Reserve, Georgetown, SC 29442, USA; Baruch Marine Field Laboratory, University of South Carolina, Georgetown, SC 29442, USA
| | - Annelise K Gonzales
- Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA
| | - Brian A Powell
- Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA; Center for Nuclear Environmental Engineering Sciences and Radioactive Waste Management (NEESRWM), Clemson, SC 29634, USA
| | - Nicole E Martinez
- Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA; Center for Nuclear Environmental Engineering Sciences and Radioactive Waste Management (NEESRWM), Clemson, SC 29634, USA
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3
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Zakiryanova ID, Mushnikov PN, Nikolaeva EV, Zaikov YP. Mechanism and Kinetics of Interaction of FLiNaK–CeF3 Melt with Water Vapors and Oxygen in the Air Atmosphere. Processes (Basel) 2023. [DOI: 10.3390/pr11040988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
The mechanism and kinetic parameters of the interaction of the FLiNaK–CeF3 melt with water vapors and oxygen in the air atmosphere were determined using Raman and IR spectroscopy, XRD analysis, and thermodynamic modeling of processes. The presence of the 4CeF3(solution) + 6H2O (gas) + O2(gas) = 4CeO2(solid) + 12HF(gas) reaction, which disturbs the fluoride melt homogeneity, was verified in situ by Raman spectroscopy adopted for high-temperature, chemically aggressive fluoride systems. Based on the obtained spectral data, the type of the kinetic equation, order, and rate constant of the chemical reaction were determined. The concentration of cerium dioxide was found to increase linearly in time and a zero reaction order with respect to CeO2 was detected. The change in the concentration of CeO2 over time at T = 510 °C is described by the equation C = 0.085t; the reaction rate constant is 0.085 mol. %∙min−1. The obtained kinetic parameters may be used to model emergencies related with the depressurization of the coolant circuit or the working area of the molten salt reactor.
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4
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Novikov DA, Khvaschevskaya AA, Kopylova YG, Pyryaev AN, Maksimova AA, Derkachev AS, Dultsev FF, Chernykh AV, Purgina DV. Hydrogeochemistry and stable isotopes in radon-rich thermal waters of Belokurikha (Altai, Russia). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:83081-83098. [PMID: 35761131 DOI: 10.1007/s11356-022-21640-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
The first integrated isotope and chemistry results have been obtained for radon-rich thermal waters from the Belokurikha field which are used at a large spa resort in Altai, Russia. The waters reside in an unconfined aquifer composed of Quaternary soft sediments and in a confined (artesian) aquifer of monolithic to weathered Upper Paleozoic granites. The waters belong to three geochemical groups: low-radon nitrogen-silicic interstitial waters in weathered Paleozoic granites; groundwaters of REE-enriched and background compositions; surface waters of the Belokurikha River. The interstitial waters in granites have HCO3-SO4 Na and SO4-HCO3 Na major-ion chemistry, total salinity from 198 to 257 mg/L, pH = 8.6-9.6, silica contents of 19.8 to 24.6 mg/L, and 222Rn activity from 160 to 360 Bq/L (290 Bq/L on average). Judging by their oxygen and hydrogen (deuterium) isotope compositions (-17.5 to -14.2 ‰ and -126.9 to -102.7 ‰, respectively), the Belokurikha aquifers recharge with infiltrating meteoric water, especially the winter precipitation. The carbon isotope composition of dissolved inorganic carbon (-9.7 to -25.6 ‰ δ13СDIC) corresponds to biogenic origin. Comparison of radon-rich mineral waters from different areas of southern Siberia shows that the change from oxidized to reduced environments leads to 232Th/238U increase from 4.20∙10-5-7.39∙10-2 to 0.0022-26, respectively, with an intermediate range of 2.63∙10-5-0.20 in transitional conditions.
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Affiliation(s)
- Dmitry A Novikov
- A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
- Novosibirsk National Research University, Novosibirsk, Russia
| | | | - Yulia G Kopylova
- Engineering School for Natural Resources, Tomsk Polytechnical University, Tomsk, Russia
| | - Aleksandr N Pyryaev
- Novosibirsk National Research University, Novosibirsk, Russia
- V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | - Anastasia A Maksimova
- A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
- Novosibirsk National Research University, Novosibirsk, Russia
| | - Anton S Derkachev
- A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
- Novosibirsk National Research University, Novosibirsk, Russia
| | - Fedor F Dultsev
- A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.
- Novosibirsk National Research University, Novosibirsk, Russia.
| | - Anatoliy V Chernykh
- A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
- Novosibirsk National Research University, Novosibirsk, Russia
| | - Daria V Purgina
- Engineering School for Natural Resources, Tomsk Polytechnical University, Tomsk, Russia
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5
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Voskresenskaya OO. Hydrolysis and Complex Formation of Cerium(IV) with Dioxysuccinic Acid in Sulfate Solutions. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622070233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Milani SA, Zahakifar F. Stoichiometry and thermodynamics of cerium(IV) solvent extraction from sulfuric acid solutions by CYANEX 301. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1007/s43153-022-00242-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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7
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Fedorov YS, Samonin VV, Zotov AS, Khrylova ED, Spiridonova EA, Miroslavov AE, Akatov AA. Sorption of NdF3 and ThF4 from the LiF–NaF–KF Melt. RADIOCHEMISTRY 2022. [DOI: 10.1134/s1066362221060072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract
The sorption of neodymium and thorium fluorides by AG-3 activated carbon from molten alkali metal fluorides LiF–NaF–KF has been studied. The sorption isotherm of neodymium fluoride at 650°C has a pronounced convex and is adequately described by the Langmuir equation. The sorption of thorium fluoride under the same conditions is much weaker than that of neodymium fluoride, which is determined by the size of the neodymium and thorium fluoride complexes. The kinetic dependence of the sorption of neodymium fluoride at a temperature of 650°С is adequately described by a first-order equation for a reversible reaction. The temperature dependence of sorption capacity in the range 550–750°С passes a maximum within 600–650°С.
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9
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Sarkar S, Chandra S, Suneesh A, Ramanathan N, Sundararajan K, Suresh A, Sivaraman N. Elucidating the extraction behaviour of tri-n-alkyl phosphates and tris(2-methylbutyl) phosphate with nitrates of uranyl and tetravalent metal ions from infrared spectroscopy and dynamic light scattering studies: A distinct correlation from conformational changes and variation in size of aggregates. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Aoki J, Oonuma C, Sudowe R, Takagai Y. Adsorption Behavior of Pu(IV), Am(III), Cm(III), and U(VI) on Desferrioxamine B-immobilized Micropolymer and Its Applications in the Separation of Pu(IV). ANAL SCI 2021; 37:1641-1644. [PMID: 34759094 DOI: 10.2116/analsci.21n028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The adsorption properties of Pu(IV), Am(III), Cm(III), and U(VI) on desferrioxamine B-immobilized micropolymeric resin (DMPs) and adsorbed species were elucidated using thermodynamic constants and log β values. This allowed the determination of adsorption characteristics (91, 95, 88, and 97% for Pu(IV), Am(III), Cm(III), and U(VI), respectively) and individual pH-independent adsorption properties. Pu(IV) could be separated from Am(III), Cm(III), and U(VI) at pH 2. The separation of Pu(IV) from Am(III), Cm(III), and U(VI) was achieved by controlling the pH of the solution using a single resin.
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Affiliation(s)
- Jo Aoki
- Cluster of Science and Technology, Fukushima University
| | | | - Ralf Sudowe
- Department of Environmental & Radiological Health Sciences, Colorado State University
| | - Yoshitaka Takagai
- Cluster of Science and Technology, Fukushima University.,Institute of Environmental Radioactivity, Fukushima University
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11
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Schreinemachers C, Bollen O, Leinders G, Tyrpekl V, Modolo G, Verwerft M, Binnemans K, Cardinaels T. Hydrolysis of Uranyl‐, Nd‐, Ce‐Ions and their Mixtures by Thermal Decomposition of Urea. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Christian Schreinemachers
- Forschungszentrum Jülich GmbH Institute of Energy and Climate Research (IEK), IEK-6: Nuclear Waste Management and Reactor Safety 52425 Jülich Germany
- Belgian Nuclear Research Centre (SCK CEN) Institute for Nuclear Materials Science Boeretang 200 B-2400 Mol Belgium
- KU Leuven Department of Chemistry Celestijnenlaan 200F, P.O. Box 2404 B-3001 Heverlee Belgium
| | - Olivier Bollen
- KU Leuven Department of Chemistry Celestijnenlaan 200F, P.O. Box 2404 B-3001 Heverlee Belgium
| | - Gregory Leinders
- Belgian Nuclear Research Centre (SCK CEN) Institute for Nuclear Materials Science Boeretang 200 B-2400 Mol Belgium
| | - Václav Tyrpekl
- Charles University in Prague Department of Inorganic Chemistry Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Giuseppe Modolo
- Forschungszentrum Jülich GmbH Institute of Energy and Climate Research (IEK), IEK-6: Nuclear Waste Management and Reactor Safety 52425 Jülich Germany
| | - Marc Verwerft
- Belgian Nuclear Research Centre (SCK CEN) Institute for Nuclear Materials Science Boeretang 200 B-2400 Mol Belgium
| | - Koen Binnemans
- KU Leuven Department of Chemistry Celestijnenlaan 200F, P.O. Box 2404 B-3001 Heverlee Belgium
| | - Thomas Cardinaels
- Belgian Nuclear Research Centre (SCK CEN) Institute for Nuclear Materials Science Boeretang 200 B-2400 Mol Belgium
- KU Leuven Department of Chemistry Celestijnenlaan 200F, P.O. Box 2404 B-3001 Heverlee Belgium
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12
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Hu S, Xu P, Xu RX, Zheng X. Unveiling the High Catalytic Activity of a Dinuclear Iron Complex for the Oxygen Evolution Reaction. Inorg Chem 2021; 60:7297-7305. [PMID: 33914515 DOI: 10.1021/acs.inorgchem.1c00394] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The dinuclear iron complex [(H2O)-FeIII-(ppq)-O-(ppq)-FeIII-Cl]3+ (FeIII(ppq), ppq = 2-(pyrid-2'-yl)-8-(1″,10″-phenanthrolin-2″-yl)-quinoline) demonstrates a catalytic activity about one order of magnitude higher than the mononuclear iron complex [Cl-FeIII(dpa)-Cl]+ (FeIII(dpa), dpa = N,N-di(1,10-phenanthrolin-2-yl)-N-isopentylamine) for the oxygen evolution reaction (OER). However, the mechanism behind such an unusually high activity has remained largely unclear. To solve this puzzle, a decomposition-and-reaction mechanism is proposed for the OER with the dinuclear FeIII(ppq) complex as the initial state of the catalytic agent. In this mechanism, the high-valent dinuclear iron complex first dissociates into two mononuclear moieties, and the oxidized mononuclear iron complexes directly catalyze the formation of an O-O bond through a nitrate attack pathway with nitrate functioning as a cocatalyst. Density functional theory calculations reveal that it is the electron-deficient microenvironment around the iron center that gives rise to the remarkable catalytic activity observed experimentally. Therefore, the outstanding performance of the FeIII(ppq) catalyst can be ascribed to the high reactivity of its mononuclear moieties in a high oxidation state, which is concomitant with the structural stability of the low-valent dinuclear complex. The theoretical insights provided by this study could be useful for the optimization and design of novel iron-based water oxidation catalysts.
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Affiliation(s)
- Shaojin Hu
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics & CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Penglin Xu
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics & CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Rui-Xue Xu
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics & CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230026, China.,Department of Chemical Physics & Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiao Zheng
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics & CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230026, China.,Department of Chemical Physics & Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, Anhui 230026, China
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13
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Chen B, Liu B, He Y, Luo D, Mu W, Yang Y, Yang Y, Peng S, Li X. Complexation of Cyclic Glutarimidedioxime with Cerium: Surrogating for Redox Behavior of Plutonium. Inorg Chem 2021; 60:3139-3148. [PMID: 33576608 DOI: 10.1021/acs.inorgchem.0c03480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The complexation of cerium with glutarimidedioxime (H2L) was studied by potentiometry, ESI-mass spectrometry, and cyclic voltammetry. Crystallization of [CeIV(HL)3]+ from Ce3+ starting reactant indicated spontaneous complexation-driven oxidation. In aqueous solution, Ce3+ ions form three successive complexes, Ce(HL)2+, Ce(HL)2+, and Ce(HL)3 (where HL- stands for the singly deprotonated ligand). The interactions of glutarimidedioxime with metal ions are dominantly electrostatic in nature, and the stability constants of the complexes are correlated to the charge density of metal ions. Extrapolations of predicted stability constant (log β) values were made from plotting effective charge and the ionic radius of the metal ion for Pu3+ and Pu4+. The stability constants of PuIV(HL)3+ and PuIII(HL)2+ are estimated to be 27.74 and 19.75, respectively. The differences of stability constants mean that glutarimidedioxime selectively binds Pu4+ over Pu3+ by a factor of about 8 orders of magnitude, suggesting Pu4+ would be stabilized by chelation with glutarimidedioxime. The mechanism of reduction of Pu4+ to Pu3+ in acidic solution is explained by decomposition of glutarimidedioxime through acid hydrolysis rather than a chelation-driven mechanism.
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Affiliation(s)
- Baihua Chen
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
| | - Bijun Liu
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
| | - Yao He
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
| | - Daibing Luo
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Wanjun Mu
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
| | - Yuchuan Yang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
| | - Yanqiu Yang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
| | - Shuming Peng
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
| | - Xingliang Li
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan 621999, China
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14
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Li W, Liu XM. Mobilization and partitioning of rare earth elements in the presence of humic acids and siderophores. CHEMOSPHERE 2020; 254:126801. [PMID: 32334256 DOI: 10.1016/j.chemosphere.2020.126801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 04/11/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
Developing rare earth elements (plus yttrium, REY) as a group of environmental tracer requires comprehensive understandings in their geochemical behaviors associated with natural organic matter. Recent work highlighted the promotions on REY mobilization and cerium oxidation by siderophores during silicate dissolution, but the mechanism remained ambiguous. Here, we performed batch fluid-rock interaction experiments to explore the functions of siderophore desferrioxamine B (DFOB) and humic acids (HA) towards REY mobility and partitioning during REY-bearing ferrihydrite dissolution. To acquire in-depth knowledge of organic controls on REY, we used multiple strategies, including elemental, multispectral, and electrochemical analyses, to investigate the organic regulation on REY geochemistry. This study sheds light on the function of ligand-specific selectivity and solid-fluid organic molecular fractionation, primarily dependent on hydrochemical settings (pH, organic compounds, ionic strength, and oxicity). Our results confirm the catalytic oxidation ability of ligand, which forms DFOB-Ce(IV) (K = 1042, electrochemistry), producing positive Ce anomalies in solutions by ligand-driven redox shifting. Both HA and DFOB showed high affinities to HREY, and facilitated LREY/HREY partitioning. The mobilization of REY and the development of Ce anomalies were limited by HA coatings that modified surface properties and disturbed the approach of DFOB. Excess siderophores attack inert HA coatings, facilitating REY liberation and Ce redox activities. The release of REY and catalytic oxidation of Ce can be inhibited at high ionic strength or under oxygen deficiency. Our study reveals that natural organic matter significantly influences the fate of REY in iron oxides, and crucial for the biogeochemical cycles of REY in nature.
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Affiliation(s)
- Wenshuai Li
- Department of Geological Sciences, University of North Carolina-Chapel Hill, NC, USA.
| | - Xiao-Ming Liu
- Department of Geological Sciences, University of North Carolina-Chapel Hill, NC, USA.
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15
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Kozlova TO, Mironov AV, Istomin SY, Birichevskaya KV, Gippius AA, Zhurenko SV, Shatalova TB, Baranchikov AE, Ivanov VK. Meet the Cerium(IV) Phosphate Sisters: Ce IV (OH)PO 4 and Ce IV 2 O(PO 4 ) 2. Chemistry 2020; 26:12188-12193. [PMID: 32608019 DOI: 10.1002/chem.202002527] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/16/2020] [Indexed: 11/10/2022]
Abstract
Two new cerium(IV) phosphates were obtained: cerium(IV) hydroxidophosphate, Ce(OH)PO4 , and cerium(IV) oxidophosphate, Ce2 O(PO4 )2 , which were shown to complement the classes of isostructural compounds M(OH)PO4 and R2 O(PO4 )2 , where M=Th, U and R=Th, U, Np, Zr. Ce2 O(PO4 )2 oxidophosphate is formed by elimination of H2 O from the crystal structure of Ce(OH)PO4 during its thermal decomposition. The structures of Ce(OH)PO4 and Ce2 O(PO4 )2 are related to each other with the same Cmce space group and similar unit cell parameters (a=6.9691(3) Å, b=9.0655(4) Å, c=12.2214(4) Å, V=772.13(8) Å3 , Z=8; a=7.0220(4) Å, b=8.9894(5) Å, c=12.544(1) Å, V=791.8(1) Å3 , Z=4, respectively).
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Affiliation(s)
- Taisiya O Kozlova
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prospect 31, 119991, Moscow, Russia
| | - Andrey V Mironov
- Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia
| | - Sergey Y Istomin
- Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia.,National Research University Higher School of Economics, 20 Myasnitskaya str., Moscow, 101000, Russia
| | - Karina V Birichevskaya
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prospect 31, 119991, Moscow, Russia
| | - Andrey A Gippius
- Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia.,Lebedev Physical Institute, Russian Academy of Sciences, Leninsky prospect 53, 119991, Moscow, Russia
| | - Sergey V Zhurenko
- Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia.,Lebedev Physical Institute, Russian Academy of Sciences, Leninsky prospect 53, 119991, Moscow, Russia
| | | | - Alexander E Baranchikov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prospect 31, 119991, Moscow, Russia
| | - Vladimir K Ivanov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prospect 31, 119991, Moscow, Russia
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16
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Klemme S, Berndt J. Trace element partitioning between pyrochlore, microlite, fersmite and silicate melts. GEOCHEMICAL TRANSACTIONS 2020; 21:9. [PMID: 32833060 PMCID: PMC7444060 DOI: 10.1186/s12932-020-00072-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 07/28/2020] [Indexed: 06/11/2023]
Abstract
We present experimentally determined trace element partition coefficients (D) between pyrochlore-group minerals (Ca2(Nb,Ta)2O6(O,F)), Ca fersmite (CaNb2O6), and silicate melts. Our data indicate that pyrochlores and fersmite are able to strongly fractionate trace elements during the evolution of SiO2-undersaturated magmas. Pyrochlore efficiently fractionates Zr and Hf from Nb and Ta, with DZr and DHf below or equal to unity, and DNb and DTa significantly above unity. We find that DTa pyrochlore-group mineral/silicate melt is always higher than DNb, which agrees with the HFSE partitioning of all other Ti-rich minerals such as perovskite, rutile, ilmenite or Fe-Ti spinel. Our experimental partition coefficients also show that, under oxidizing conditions, DTh is higher than corresponding DU and this implies that pyrochlore-group minerals may fractionate U and Th in silicate magmas. The rare earth element (REE) partition coefficients are around unity, only the light REE are compatible in pyrochlore-group minerals, which explains the high rare earth element concentrations in naturally occurring magmatic pyrochlores.
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Affiliation(s)
- Stephan Klemme
- Institut für Mineralogie, Universität Münster, Corrensstraße 24, 48149 Münster, Germany
| | - Jasper Berndt
- Institut für Mineralogie, Universität Münster, Corrensstraße 24, 48149 Münster, Germany
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17
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Acher E, Masella M, Vallet V, Réal F. Properties of the tetravalent actinide series in aqueous phase from a microscopic simulation self-consistent engine. Phys Chem Chem Phys 2020; 22:2343-2350. [PMID: 31932817 DOI: 10.1039/c9cp04912f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the context of nuclear fuel recycling and environmental issues, the understanding of the properties of radio-elements with various approaches remains a challenge regarding their dangerousness. Moreover, experimentally, some issues are also of importance; first, it is imperative to work at sufficiently high concentrations to reach the sensitivities of the analytical tools, however this condition often leads to precipitation for some of them; second, stabilizing specific oxidation states of some actinides remains a challenge, thus making it difficult to extract general trends across the actinide series. Complementary to experiments, modeling can be used to unbiasedly probe the actinide's properties in an aquatic environment and offers a predictive tool. We report the first molecular dynamics simulations based on homogeneously built force fields for the whole series of the tetravalent actinides in aqueous phase from ThIV to BkIV and including PuIV. The force fields used to model the interactions among the constituents include polarization and charge donation microscopic effects. They are built from a self-consistent iterative ab initio based engine that can be included in future developments as an element of a potential machine learning procedure devoted to generating accurate force fields. The comparison of our simulated hydrated actinide properties to available experimental data shows the model robustness and the relevance of our parameter assignment engine. Moreover, our simulated structural, dynamical and evolution of the hydration free energy data show that, apart from AmIV and CmIV, the actinide properties change progressively along the series.
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Liu H, Guo H, Pourret O, Chen Y, Yuan R. Role of Manganese Oxyhydroxides in the Transport of Rare Earth Elements Along a Groundwater Flow Path. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E2263. [PMID: 31248060 PMCID: PMC6651366 DOI: 10.3390/ijerph16132263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/19/2019] [Accepted: 06/25/2019] [Indexed: 12/02/2022]
Abstract
Rare earth elements (REE) are known to be emerging contaminants in hydrosphere, but roles of hydrous manganese oxyhydroxides (HMO) in REE transport in groundwater remains unknown. In this study, groundwater was sampled along a flow path in the North China Plain to determine the behavior of REE surface complexation to HMO by a modeling and field study approach. Results show that the proportion of neodymium (Nd) complexed by HMO ranges from 0.2% to 95.8%, and from 0.3% to 99.6% in shallow groundwater and deep groundwater, respectively. The amount of complexed REE increases along the flow path. REE bound to HMO exhibit decreasing trends with increasing atomic number. The process was determined to be independent of pH, HMO content, and metal loading. This finding further demonstrates HMO-REE complexation plays a key role in transport of REE in groundwater through preferential scavenging of light REE (LREE) over heavy REE (HREE). Nevertheless, carbonate ligands appear to be robust competitors in reducing the amount of REE sorbed to HMO when solution pH rises above 8.0. Assuming that 50% of Mn concentration occurs as HMO, the amount of complexed REE was predicted to show a more marked decrease in LREE compared to that of HREE.
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Affiliation(s)
- Haiyan Liu
- School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, China.
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China.
- UniLaSalle, AGHYLE, 60026 Beauvais Cedex, France.
| | - Huaming Guo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China.
| | | | - Yi Chen
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China.
| | - Rongxiao Yuan
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China.
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Chandrasekar A, Sivaraman N, Ghanty TK, Suresh A. Experimental evidence and quantum chemical insights into extraction and third phase aggregation trends in Ce(IV) organophosphates. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.02.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Liu H, Pourret O, Guo H, Martinez RE, Zouhri L. Impact of Hydrous Manganese and Ferric Oxides on the Behavior of Aqueous Rare Earth Elements (REE): Evidence from a Modeling Approach and Implication for the Sink of REE. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:E2837. [PMID: 30545162 PMCID: PMC6313485 DOI: 10.3390/ijerph15122837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/30/2018] [Accepted: 12/10/2018] [Indexed: 11/27/2022]
Abstract
In this study, models were used for the first time to investigate the fate and transport of rare earth elements (REE) in the presence of hydrous manganese and ferric oxides in groundwaters from the coastal Bohai Bay (China). Results showed that REE sorption is strongly dependent on pH, as well as hydrous manganese and ferric oxide content. Higher proportions of REE were sorbed by hydrous manganese oxide as compared to hydrous ferric oxides, for example in the presence of neodymium. In this case, a mean 28% of this element was sorbed by hydrous manganese oxide, whereas an average 7% sorption was observed with hydrous ferric oxides. A contrasting REE sorption behavior was observed with hydrous manganese and ferric oxide for all investigated groundwaters. Specifically, REE bound to hydrous manganese oxides showed decreasing sorption patterns with increasing atomic number. The opposite trend was observed in the presence of hydrous ferric oxides. In addition, these results suggested that light REE (from La to Sm) rather than heavy REE (from Eu to Lu) are preferentially scavenged by hydrous manganese oxide. However, the heavy REE showed a greater affinity for hydrous ferric oxides compared to light REE. Therefore, both hydrous manganese and ferric oxide are important scavengers of REE. This study shows the implication of hydrous manganese and ferric oxide sorption for the sink of REE in groundwater.
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Affiliation(s)
- Haiyan Liu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, PR China.
- Guangdong Provincial Academy of Environmental Science, Guangzhou 510000, PR China.
- UniLaSalle, AGHYLE, 60026 Beauvais cedex, France.
| | | | - Huaming Guo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, PR China.
| | - Raul E Martinez
- Institut für Geo- und Ulweltnaturwissenschaften, Albert-Ludwigs Universität, 79104 Freiburg, Germany.
- Max-Planck-Research Group Paleobiogeochemistry, University of Bremen, 28359 Bremen, Germany.
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Abstract
Ceria is the main component in glass polishing powders due to its special physico-chemical properties. Glass polishing powder loses its polishing ability gradually during usage due to the accumulation of other compounds on the polishing powder or due to changes in the particle size distribution. The recovery of cerium from the glass polishing waste results in the efficient utilization of natural resources. This paper reviews processes for the recovery of rare earths from polishing waste. Glass polishing powder waste can be reused via physical, physico-chemical or chemical processes by removing silica and/or alumina. The removal of silica and/or alumina only improves the life span up to some extent. Therefore, removal of other elements by chemical processes is required to recover a cerium or cerium-rich product. However, cerium leaching from the polishing waste is challenging due to the difficulties associated with the dissolution of ceria. Therefore, high acid concentrations, high temperatures or costly reducing agents are required for cerium dissolution. After leaching, cerium can be extracted from the leach solution by solvent extraction or selective precipitation. The product can be used either in glass polishing again or other high value added applications.
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