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Kumar S, Rothe J, Finck N, Vitova T, Dardenne K, Beck A, Schild D, Geckeis H. Effect of manganese on the speciation of neptunium(V) on manganese doped magnetites. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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2
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Ilmenite Alteration and Its Adsorption and Catalytic Reduction in U Enrichment in Sandstone-Hosted U Deposits from the Northern Ordos Basin, North China. MINERALS 2022. [DOI: 10.3390/min12020167] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Detrital ilmenite and its altered minerals are common in sandstone-hosted U deposits in the northern Ordos Basin, north China. Petrographic observation, SEM-EDS, EMPA, and LA-MC-ICP-MS were utilized to characterize the spatial relationship between altered ilmenite and the U minerals, and to investigate the U enrichment mechanism and alteration processes of ilmenite. Ilmenite was completely or partially altered to leucoxene and anatase along its rim and crack in ore-bearing sandstone. Framboidal and cement pyrite of BSR and TSR origin were identified around altered ilmenite. Two U phases closely related to altered ilmenite contain Ti-coffinite (I) and coffinite (II). These data indicate that ilmenite alteration and the associated processes of U enrichment can be divided into two stages. Stage one involves U pre-enrichment and adsorption, with stage two involving U enrichment via TiO2 (leucoxene and anatase) catalytic reduction. Ilmenite was altered into porous leucoxene that can adsorb U as uraniferous leucoxene and Ti-coffinite (I) and framboidal pyrite directly by reactions with H2S, produced by sulfate-reducing bacteria during synsedimentary and early diagenesis stages. Altered ilmenite can enrich U in the form of coffinite (II) through a catalytic reduction reaction which is triggered by β and γ radiation produced by previously adsorbed U during the uplift of ore-bearing bed in the Late Cretaceous period. In addition, cement pyrite can also reduce U6+ into U4+ which deposits on its surface in the form of coffinite (II). These results demonstrate a new mechanism, mediated by adsorption and catalytic reduction, to enrich U in sandstone-hosted U deposits.
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Huang J, Jones A, Waite TD, Chen Y, Huang X, Rosso KM, Kappler A, Mansor M, Tratnyek PG, Zhang H. Fe(II) Redox Chemistry in the Environment. Chem Rev 2021; 121:8161-8233. [PMID: 34143612 DOI: 10.1021/acs.chemrev.0c01286] [Citation(s) in RCA: 147] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Iron (Fe) is the fourth most abundant element in the earth's crust and plays important roles in both biological and chemical processes. The redox reactivity of various Fe(II) forms has gained increasing attention over recent decades in the areas of (bio) geochemistry, environmental chemistry and engineering, and material sciences. The goal of this paper is to review these recent advances and the current state of knowledge of Fe(II) redox chemistry in the environment. Specifically, this comprehensive review focuses on the redox reactivity of four types of Fe(II) species including aqueous Fe(II), Fe(II) complexed with ligands, minerals bearing structural Fe(II), and sorbed Fe(II) on mineral oxide surfaces. The formation pathways, factors governing the reactivity, insights into potential mechanisms, reactivity comparison, and characterization techniques are discussed with reference to the most recent breakthroughs in this field where possible. We also cover the roles of these Fe(II) species in environmental applications of zerovalent iron, microbial processes, biogeochemical cycling of carbon and nutrients, and their abiotic oxidation related processes in natural and engineered systems.
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Affiliation(s)
- Jianzhi Huang
- Department of Civil and Environmental Engineering, Case Western Reserve University, 2104 Adelbert Road, Cleveland, Ohio 44106, United States
| | - Adele Jones
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - T David Waite
- UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Yiling Chen
- Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Xiaopeng Huang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kevin M Rosso
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Andreas Kappler
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, 72076 Tuebingen, Germany
| | - Muammar Mansor
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, 72076 Tuebingen, Germany
| | - Paul G Tratnyek
- School of Public Health, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97239, United States
| | - Huichun Zhang
- Department of Civil and Environmental Engineering, Case Western Reserve University, 2104 Adelbert Road, Cleveland, Ohio 44106, United States
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Zhang X, Guo J, Wu S, Chen F, Yang Y. Divalent heavy metals and uranyl cations incorporated in calcite change its dissolution process. Sci Rep 2020; 10:16864. [PMID: 33033272 PMCID: PMC7546630 DOI: 10.1038/s41598-020-73555-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/16/2020] [Indexed: 11/09/2022] Open
Abstract
Due to the high capacity of impurities in its structure, calcite is regarded as one of the most attractive minerals to trap heavy metals (HMs) and radionuclides via substitution during coprecipitation/crystal growth. As a high-reactivity mineral, calcite may release HMs via dissolution. However, the influence of the incorporated HMs and radionuclides in calcite on its dissolution is unclear. Herein, we reported the dissolution behavior of the synthesized calcite incorporated with cadmium (Cd), cobalt (Co), nickel (Ni), zinc (Zn), and uranium (U). Our findings indicated that the HMs and U in calcite could significantly change the dissolution process of calcite. The results demonstrated that the incorporated HMs and U had both inhibiting and enhancing effects on the solubility of calcite, depending on the type of metals and their content. Furthermore, secondary minerals such as smithsonite (ZnCO3), Co-poor aragonite, and U-rich calcite precipitated during dissolution. Thus, the incorporation of metals into calcite can control the behavior of HMs/uranium, calcite, and even carbon dioxide.
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Affiliation(s)
- Xiaohang Zhang
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China
- University of Chinese Academy of Science, 19 Yuquan Road, Beijing, 100049, China
| | - Jianan Guo
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China
- University of Chinese Academy of Science, 19 Yuquan Road, Beijing, 100049, China
| | - Shijun Wu
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China.
| | - Fanrong Chen
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China
| | - Yongqiang Yang
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China
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5
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Zhang J, Wang Z, Chen R, Chen F. New soft chemistry route to titanomagnetite magnetic nanoparticles with enhanced peroxidase-like activity. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.06.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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6
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Xu H, Bai Z, Zhang M, Wang J, Yan Y, Qiu M, Chen J. Water-locking molecule-assisted fabrication of nature-inspired Mg(OH) 2 for highly efficient and economical uranium capture. Dalton Trans 2020; 49:7535-7545. [PMID: 32458903 DOI: 10.1039/d0dt00618a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
With the depletion of uranium terrestrial deposits, researchers have focused on the development of adsorbents to extract radioactive uranium from seawater/wastewater. However, the artificial manipulation of adsorbents for the cost-effective extraction of radioactive uranium from large numbers of water samples is still significantly challenging. Herein, a facile yet versatile stepwise strategy has been reported for the fabrication of adsorbents. Magnesium hydroxide (Mg(OH)2) was fabricated via the in situ conversion of a natural ore powder (magnesite), whose unique internal pore structure is highly suitable for the development of highly efficient sorbents. The coordination interaction of the synthesized adsorbent with uranium was enhanced by further introducing inexpensive molecules with water-locking properties, which resulted in superior extraction capacity and low production cost. After careful calculation, the cost per kilogram of the adsorbent was found to be about $0.21. The adsorption behaviors of the synthesized adsorbent CMC-PAM/Mg(OH)2 were investigated by batch adsorption, flow-through column adsorption (in laboratory), and field adsorption experiments in natural seawater and river. Representatively, CMC-PAM/Mg(OH)2 was exceptional in extracting uranium not only at high concentrations with sufficient capacities in a wide pH range (1584.67 mg g-1 and 454.55 mg g-1 at pH = 5 and pH = 8, respectively), but also in trace quantities including uranium in a flow-through column (55.68 mg g-1), natural seawater (8.6 mg g-1), and river (6.7 mg g-1). Inspired by this excellent performance, the effects of competitive ions on the selective adsorption of uranium by CMC-PAM/Mg(OH)2 in simulated wastewater and seawater environments were further studied. Using a combination of FTIR spectroscopic and XPS studies, it was revealed that the amine and hydroxyl groups enhanced the overall uranyl affinity of the CMC-PAM/Mg(OH)2 composite.
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Affiliation(s)
- Hengbin Xu
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
| | - Zhenyuan Bai
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
| | - Milin Zhang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China. and College of Science, Heihe University, Heihe 164300, China
| | - Jun Wang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
| | - Yongde Yan
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
| | - Min Qiu
- College of Science, Heihe University, Heihe 164300, China
| | - Jiaming Chen
- College of Science, Heihe University, Heihe 164300, China
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Chen P, Ma Y, Kang M, Shang C, Song Y, Xu F, Wang J, Song G, Yang Y. The redox behavior of uranium on Beishan granite: Effect of Fe 2+ and Fe 3+ content. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 217:106208. [PMID: 32217240 DOI: 10.1016/j.jenvrad.2020.106208] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/30/2020] [Accepted: 02/15/2020] [Indexed: 06/10/2023]
Abstract
The Beishan granitic area in Gansu Province is a site with the greatest potential for a repository of high-level radioactive waste (HLW) in China. In this study, the redox behavior of uranium on Beishan granite was investigated at pH values from ~4.4 to ~9.2. Due to the presence of Fe2+-containing fluorannite, results showed that U(VI) was partially reduced by the granites from boreholes 2 (486 m) and 28 (670 m) at a relatively low initial pH whether Na2CO3/NaCl or native groundwater was used as a background electrolyte. Partial oxidation of UO2 was observed when UO2 contacted Beishan granite directly. Therefore, this incomplete reduction of U(VI) was mainly attributed to minor Fe3+ that was either originally contained in the granite or generated during U(VI) reduction. Consequently, aliovalent oxides (e.g., U3O8, U3O7, U4O9, etc.) should be the thermodynamically stable phase in Beishan granite. A mechanism involving the dissolution of Fe2+ from the granite structure followed by interfacial adsorption/reaction was proposed for the U(VI) reduction. This study demonstrates that Beishan granite has a good reducing capacity, which is suitable for the immobilization of redox-sensitive radionuclides. However, potential oxidation of spent fuel by Fe3+ in the granite should also been taken into account.
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Affiliation(s)
- Ping Chen
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Yue Ma
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Mingliang Kang
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China.
| | - Chengming Shang
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Yang Song
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Fengqi Xu
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China
| | - Ju Wang
- Beijing Research Institute of Uranium Geology, Beijing, 100029, China
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, 230 Waihuan Street, Guangzhou, 510006, China
| | - Yongqiang Yang
- Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; CAS Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
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8
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9
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Peng H, Pearce CI, N'Diaye AT, Zhu Z, Ni J, Rosso KM, Liu J. Redistribution of Electron Equivalents between Magnetite and Aqueous Fe 2+ Induced by a Model Quinone Compound AQDS. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:1863-1873. [PMID: 30673270 DOI: 10.1021/acs.est.8b05098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The complex interactions between magnetite and aqueous Fe2+ (Fe2+(aq)) pertain to many biogeochemical redox processes in anoxic subsurface environments. The effect of natural organic matter, abundant in these same environments, on Fe2+(aq)-magnetite interactions is an additional complex that remains poorly understood. We investigated the influence of a model quinone molecule anthraquinone-2,6-disulfonate (AQDS) on Fe2+(aq)-magnetite interactions by systematically studying equilibrium Fe2+(aq) concentrations, rates and extents of AQDS reduction, and structural versus surface-localized Fe(II)/Fe(III) ratios in magnetite under different controlled experimental conditions. The equilibrium concentration of Fe2+(aq) in Fe2+-amended magnetite suspensions with AQDS proportionally changes with solution pH or initial AQDS concentration, but independent of magnetite loadings through the solid concentrations that were studied here. The rates and extents of AQDS reduction by Fe2+-amended magnetite proportionally increased with solution pH, magnetite loading, and initial Fe2+(aq) concentration, which correlates with the corresponding change of reduction potentials for the Fe2+-magnetite system. AQDS reduction by surface-associated Fe(II) in the Fe2+-magnetite suspensions induces solid-state migration of electron equivalents from particle interiors to the near-surface region and the production of nonmagnetic Fe(II)-containing species, which inhibits Fe2+(aq) incorporation or electron injection into the magnetite structure. This study demonstrates the significant influence of quinones on reductive activity of the Fe2+-magnetite system.
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Affiliation(s)
- Huan Peng
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering , Peking University , Beijing 100871 , China
- State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences , China University of Geosciences , Wuhan , Hubei 430074 , China
| | - Carolyn I Pearce
- Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Alpha T N'Diaye
- Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Zhenli Zhu
- State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences , China University of Geosciences , Wuhan , Hubei 430074 , China
| | - Jinren Ni
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering , Peking University , Beijing 100871 , China
| | - Kevin M Rosso
- Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Juan Liu
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering , Peking University , Beijing 100871 , China
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10
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Wang L, Song H, Yuan L, Li Z, Zhang Y, Gibson JK, Zheng L, Chai Z, Shi W. Efficient U(VI) Reduction and Sequestration by Ti 2CT x MXene. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:10748-10756. [PMID: 30149698 DOI: 10.1021/acs.est.8b03711] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Although reduction of highly mobile U(VI) to less soluble U(IV) has been long considered an effective approach to in situ environmental remediation of uranium, candidate reducing agents are largely limited to Fe-based materials and microbials. The importance of titanium-containing compounds in natural uranium ore deposits suggests a role for titanium in uranium migration. Herein, for the first time, a two-dimensional transition metal carbide, Ti2CT x, is shown to efficiently remove uranium via a sorption-reduction strategy. Batch experiments demonstrate that TiC2T x exhibits excellent U(VI) removal over a wide pH range, with an uptake capacity of 470 mg g-1 at pH 3.0. The mechanism for U(VI) to U(IV) reduction by Ti2CT x was deciphered by X-ray absorption spectroscopy and diffraction and photoelectron spectroscopy. The reduced U(IV) species at low pH is identified as mononuclear with bidendate binding to the MXene substrate. At near-neutral pH, nanoparticles of the UO2+ x phase adsorb to the substrate with some Ti2CT x transformed to amorphous TiO2. A subsequent in-depth study suggests Ti2CT x materials may be potential candidates for permeable reactive barriers in the treatment of wastewaters from uranium mining. This work highlights reduction-induced immobilization of U(VI) by Ti2CT x MXene including a pH-dependent reduction mechanism that might promote applications of titanium-based materials in the elimination of other oxidized contaminants.
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Affiliation(s)
- Lin Wang
- Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Huan Song
- Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
- School of Chemistry and Chemical Engineering , University of South China , Hengyang 421001 , China
| | - Liyong Yuan
- Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Zijie Li
- Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Yujuan Zhang
- School of Materials Science and Engineering , University of Science and Technology Beijing , Beijing 100083 , China
| | - John K Gibson
- Chemical Sciences Division , Lawrence Berkeley National Laboratory (LBNL) , Berkeley , California 94720 , United States
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Zhifang Chai
- Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Weiqun Shi
- Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
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11
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Hu Q, Zhu Y, Hu B, Lu S, Sheng G. Mechanistic insights into sequestration of U(VI) toward magnetic biochar: Batch, XPS and EXAFS techniques. J Environ Sci (China) 2018; 70:217-225. [PMID: 30092964 DOI: 10.1016/j.jes.2018.01.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/15/2018] [Accepted: 01/16/2018] [Indexed: 06/08/2023]
Abstract
The magnetic iron oxide (Fe3O4) nanoparticles stabilized on the biochar were synthesized by fast pyrolysis of Fe(II)-loaded hydrophyte biomass under N2 conditions. The batch experiments showed that magnetic biochar presented a large removal capacity (54.35mg/g) at pH3.0 and 293K. The reductive co-precipitation of U(VI) to U(IV) by magnetic biochar was demonstrated according to X-ray diffraction, X-ray photoelectron spectroscopy and X-ray absorption near edge structure analysis. According to extended X-ray absorption fine structure analysis, the occurrence of U-Fe and U-U shells indicated that high effective removal of uranium was primarily inner-sphere coordination and then reductive co-precipitation at low pH. These observations provided the further understanding of uranium removal by magnetic materials in environmental remediation.
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Affiliation(s)
- Qingyuan Hu
- College of Life Science, College of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang 312000, China
| | - Yuling Zhu
- College of Life Science, College of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang 312000, China
| | - Baowei Hu
- College of Life Science, College of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
| | - Songhua Lu
- Institute of Plasma Physics, Chinese Academy of Science, Hefei 230031, China
| | - Guodong Sheng
- College of Life Science, College of Chemistry and Chemical Engineering, Shaoxing University, Zhejiang 312000, China.
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12
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Li F, Li X, Cui P. RETRACTED: Adsorption of U(VI) on magnetic iron oxide/Paecilomyces catenlannulatus composites. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.136] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Elhefnawy OA, Elabd AA. Optimization of uranyl ions removal from aqueous solution by natural and modified kaolinites. RADIOCHIM ACTA 2017. [DOI: 10.1515/ract-2016-2712] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The paper addresses the modifications of the most common mineral clay “kaolinite” for U(VI) removal from aqueous solutions. A new modified Egyptian natural kaolinite (Ca-MK) was prepared by coating kaolinite with calcium oxide. Another modification process was utilized by calcination and acid activation of kaolinite (E-MK). The Egyptian natural kaolinite (E-NK) and the two modified kaolinites were characterized by different techniques SEM, EDX, XRD, and FTIR. The removal process were investigated in batch experiments as a function of pH, contact time, initial U(VI) concentration, effect of temperature, and recovery of U(VI) were studied. The equilibrium stage was achieved after 60 min and the kinetic data was described well by pseudo-second order model. Isothermal data was better described by the Langmuir isotherm model, indicating the homogeneous removal process. Also the removal process was studied on different temperature 293, 313, and 323 K. The thermodynamic parameters ΔH°, ΔS°, and ΔG° were calculated. The thermodynamic results pointed to the endothermic and favorable nature of the U(VI) removal process in the three kaolinite adsorbents. This study indicated that (Ca-MK) has higher CEC and can be used as a new adsorbent for highly efficient removal of U(VI) from aqueous solutions.
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Affiliation(s)
- O. A. Elhefnawy
- Nuclear Safeguards and Physical Protection Department , Nuclear and Radiological Regulatory Authority (NRRA) , P.O. Box 7551 , Cairo , Egypt , Tel.: +2 01007117101, Fax: +2 2274 02 38
| | - A. A. Elabd
- Nuclear Safeguards and Physical Protection Department , Nuclear and Radiological Regulatory Authority (NRRA) , P.O. Box 7551 , Cairo , Egypt
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14
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Zhu J, Liu Q, Li Z, Liu J, Zhang H, Li R, Wang J, Emelchenko GA. Recovery of uranium(vi) from aqueous solutions using a modified honeycomb-like porous carbon material. Dalton Trans 2017; 46:420-429. [DOI: 10.1039/c6dt03227c] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel composite adsorbent, consisting of three-dimensional honeycomb-like porous carbon and MnO2 nanowires (HLPC/MnO2), has been successfully synthesized and is an excellent adsorbent for removing uranium(vi) ions from aqueous solutions.
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Affiliation(s)
- Jiahui Zhu
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- Harbin 150001
- China
| | - Qi Liu
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- Harbin 150001
- China
| | - Zhanshuang Li
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- Harbin 150001
- China
| | - Jingyuan Liu
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- Harbin 150001
- China
| | - Hongsen Zhang
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- Harbin 150001
- China
| | - Rumin Li
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- Harbin 150001
- China
| | - Jun Wang
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- Harbin 150001
- China
| | - G. A. Emelchenko
- Institute of Solid State Physics
- Russian Academy of Sciences
- Chernogolovka
- Russia
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15
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Basu A, Schilling K, Brown ST, Johnson TM, Christensen JN, Hartmann M, Reimus PW, Heikoop JM, Woldegabriel G, DePaolo DJ. Se Isotopes as Groundwater Redox Indicators: Detecting Natural Attenuation of Se at an in Situ Recovery U Mine. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:10833-10842. [PMID: 27547844 DOI: 10.1021/acs.est.6b01464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
One of the major ecological concerns associated with the in situ recovery (ISR) of uranium (U) is the environmental release of soluble, toxic selenium (Se) oxyanions generated by mining. Post-mining natural attenuation by the residual reductants in the ore body and reduced down-gradient sediments should mitigate the risk of Se contamination in groundwater. In this work, we investigate the Se concentrations and Se isotope systematics of groundwater and of U ore bearing sediments from an ISR site at Rosita, TX, USA. Our results show that selenate (Se(VI)) is the dominant Se species in Rosita groundwater, and while several up-gradient wells have elevated Se(VI), the majority of the ore zone and down-gradient wells have little or no Se oxyanions. In addition, the δ82SeVI of Rosita groundwater is generally elevated relative to the U ore up to +6.14‰, with the most enriched values observed in the ore-zone wells. Increasing δ82Se with decreasing Se(VI) conforms to a Rayleigh type distillation model with an ε of -2.25‰ ± 0.61‰, suggesting natural Se(VI) reduction occurring along the hydraulic gradient at the Rosita ISR site. Furthermore, our results show that Se isotopes are excellent sensors for detecting and monitoring post-mining natural attenuation of Se oxyanions at ISR sites.
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Affiliation(s)
- Anirban Basu
- Department of Earth and Planetary Science, University of California , 307 McCone Hall, Berkeley, California 94720, United States
| | - Kathrin Schilling
- Department of Environmental Science, Policy and Management, University of California , 130 Mulford Hall, Berkeley, California 94720, United States
| | - Shaun T Brown
- Department of Earth and Planetary Science, University of California , 307 McCone Hall, Berkeley, California 94720, United States
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Thomas M Johnson
- Department of Geology, University of Illinois at Urbana-Champaign , 605 East Springfield Avenue, Champaign, Illinois 61820, United States
| | - John N Christensen
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Matt Hartmann
- Uranium Resources, Inc. , 6950 South Potomac Street, Suite 300, Centennial, Colorado 80112, United States
| | - Paul W Reimus
- Earth and Environmental Sciences Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Jeffrey M Heikoop
- Earth and Environmental Sciences Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Giday Woldegabriel
- Earth and Environmental Sciences Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Donald J DePaolo
- Department of Earth and Planetary Science, University of California , 307 McCone Hall, Berkeley, California 94720, United States
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States
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16
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Zhang M, Gao Q, Yang C, Pang L, Wang H, Li H, Li R, Xu L, Xing Z, Hu J, Wu G. Preparation of Amidoxime-Based Nylon-66 Fibers for Removing Uranium from Low-Concentration Aqueous Solutions and Simulated Nuclear Industry Effluents. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b02652] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mingxing Zhang
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qianhong Gao
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chenguang Yang
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School
of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, China
| | - Lijuan Pang
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Honglong Wang
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Li
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
| | - Rong Li
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
| | - Lu Xu
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
| | - Zhe Xing
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
| | - Jiangtao Hu
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
| | - Guozhong Wu
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, No. 2019
Jialuo Road, Jiading District, Shanghai, 201800, China
- School
of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, China
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17
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Wylie EM, Olive DT, Powell BA. Effects of Titanium Doping in Titanomagnetite on Neptunium Sorption and Speciation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:1853-1858. [PMID: 26756748 DOI: 10.1021/acs.est.5b05339] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Neptunium-237 is a radionuclide of great interest owing to its long half-life (2.14 × 10(6) years) and relative mobility as the neptunyl ion (NpO2(+)) under many surface and groundwater conditions. Reduction to tetravalent neptunium (Np(IV)) effectively immobilizes the actinide in many instances due to its low solubility and strong interactions with natural minerals. One such mineral that may facilitate the reduction of neptunium is magnetite (Fe(2+)Fe(3+)2O4). Natural magnetites often contain titanium impurities which have been shown to enhance radionuclide sorption via titanium's influence on the Fe(2+)/Fe(3+) ratio (R) in the absence of oxidation. Here, we provide evidence that Ti-substituted magnetite reduces neptunyl species to Np(IV). Titanium-substituted magnetite nanoparticles were synthesized and reacted with NpO2(+) under reducing conditions. Batch sorption experiments indicate that increasing Ti concentration results in higher Np sorption/reduction values at low pH. High-resolution transmission electron microscopy of the Ti-magnetite particles provides no evidence of NpO2 nanoparticle precipitation. Additionally, X-ray absorption spectroscopy confirms the nearly exclusive presence of Np(IV) on the titanomagnetite surface and provides supporting data indicating preferential binding of Np to terminal Ti-O sites as opposed to Fe-O sites.
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Affiliation(s)
- E Miller Wylie
- Department of Environmental Engineering and Earth Sciences, Clemson University , Clemson, South Carolina 29634, United States
| | - Daniel T Olive
- Department of Chemistry, University of California , Berkeley, California 94720, United States
- Nuclear Science Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Brian A Powell
- Department of Environmental Engineering and Earth Sciences, Clemson University , Clemson, South Carolina 29634, United States
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18
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Facile preparation of oxine functionalized magnetic Fe3O4 particles for enhanced uranium (VI) adsorption. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.11.020] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Yan S, Chen Y, Xiang W, Bao Z, Liu C, Deng B. Uranium(VI) reduction by nanoscale zero-valent iron in anoxic batch systems: the role of Fe(II) and Fe(III). CHEMOSPHERE 2014; 117:625-30. [PMID: 25461927 DOI: 10.1016/j.chemosphere.2014.09.087] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 09/24/2014] [Accepted: 09/25/2014] [Indexed: 05/27/2023]
Abstract
The role of Fe(II) and Fe(III) in U(VI) reduction by nanoscale zerovalent iron (nanoFe0) was investigated using two iron chelators 1,10-phenanthroline and triethanolamine (TEA) under a CO2-free anoxic condition. The results showed that U(VI) reduction was strongly inhibited by 1,10-phenanthroline and TEA in a pH range from 6.9 to 9.0. For instance, at pH 6.9 the observed U(VI) reduction rates decreased by 81% and 82% in the presence of 1,10-phenanthroline and TEA, respectively. The inhibition was attributed to the formation of stable complexes between 1,10-phenanthroline and Fe(II) or TEA and Fe(III). In the absence of iron chelators, U(VI) reduction can be enhanced by surface-bound Fe(II) on nanoFe0. Our results suggested that Fe(III) and Fe(II) possibly acted as an electron shuttle to ferry the electrons from nanoFe0 to U(VI), therefore a combined system with Fe(II), Fe(III) and nanoFe0 could facilitate U(VI) reductive immobilization in the contaminated groundwater.
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Affiliation(s)
- Sen Yan
- State Key Laboratory of Bio-Geology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China.
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20
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Computational Redox Potential Predictions: Applications to Inorganic and Organic Aqueous Complexes, and Complexes Adsorbed to Mineral Surfaces. MINERALS 2014. [DOI: 10.3390/min4020345] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Latta DE, Mishra B, Cook RE, Kemner KM, Boyanov MI. Stable U(IV) complexes form at high-affinity mineral surface sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:1683-91. [PMID: 24404905 DOI: 10.1021/es4047389] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Uranium (U) poses a significant contamination hazard to soils, sediments, and groundwater due to its extensive use for energy production. Despite advances in modeling the risks of this toxic and radioactive element, lack of information about the mechanisms controlling U transport hinders further improvements, particularly in reducing environments where U(IV) predominates. Here we establish that mineral surfaces can stabilize the majority of U as adsorbed U(IV) species following reduction of U(VI). Using X-ray absorption spectroscopy and electron imaging analysis, we find that at low surface loading, U(IV) forms inner-sphere complexes with two metal oxides, TiO2 (rutile) and Fe3O4 (magnetite) (at <1.3 U nm(-2) and <0.037 U nm(-2), respectively). The uraninite (UO2) form of U(IV) predominates only at higher surface loading. U(IV)-TiO2 complexes remain stable for at least 12 months, and U(IV)-Fe3O4 complexes remain stable for at least 4 months, under anoxic conditions. Adsorbed U(IV) results from U(VI) reduction by Fe(II) or by the reduced electron shuttle AH2QDS, suggesting that both abiotic and biotic reduction pathways can produce stable U(IV)-mineral complexes in the subsurface. The observed control of high-affinity mineral surface sites on U(IV) speciation helps explain the presence of nonuraninite U(IV) in sediments and has important implications for U transport modeling.
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Affiliation(s)
- Drew E Latta
- Biosciences Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
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