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Kaplan DI, Boyanov MI, Losey NA, Lin P, Xu C, O’Loughlin EJ, Santschi PH, Xing W, Kuhne WW, Kemner KM. Uranium Biogeochemistry in the Rhizosphere of a Contaminated Wetland. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:6381-6390. [PMID: 38547454 PMCID: PMC11008245 DOI: 10.1021/acs.est.3c10481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/08/2024] [Accepted: 03/11/2024] [Indexed: 04/10/2024]
Abstract
The objective of this study was to determine if U sediment concentrations in a U-contaminated wetland located within the Savannah River Site, South Carolina, were greater in the rhizosphere than in the nonrhizosphere. U concentrations were as much as 1100% greater in the rhizosphere than in the nonrhizosphere fractions; however and importantly, not all paired samples followed this trend. Iron (but not C, N, or S) concentrations were significantly enriched in the rhizosphere. XAS analyses showed that in both sediment fractions, U existed as UO22+ coordinated with iron(III)-oxides and organic matter. A key difference between the two sediment fractions was that a larger proportion of U was adsorbed to Fe(III)-oxides, not organic matter, in the rhizosphere, where significantly greater total Fe concentrations and greater proportions of ferrihydrite and goethite existed. Based on 16S rRNA analyses, most bacterial sequences in both paired samples were heterotrophs, and population differences were consistent with the generally more oxidizing conditions in the rhizosphere. Finally, U was very strongly bound to the whole (unfractionated) sediments, with an average desorption Kd value (Usediment/Uaqueous) of 3972 ± 1370 (mg-U/kg)/(mg-U/L). Together, these results indicate that the rhizosphere can greatly enrich U especially in wetland areas, where roots promote the formation of reactive Fe(III)-oxides.
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Affiliation(s)
- Daniel I. Kaplan
- Savannah
River Ecology Laboratory, University of
Georgia, Aiken, South Carolina 29802, United States
| | - Maxim I. Boyanov
- Argonne
National Laboratory, Lemont, Illinois 60439, United States
- Chemical
Engineering, Bulgarian Academy of Sciences, Sofia 1040, Bulgaria
| | - Nathaniel A. Losey
- Savannah
River National Laboratory, Aiken, South Carolina 29808, United States
| | - Peng Lin
- Savannah
River Ecology Laboratory, University of
Georgia, Aiken, South Carolina 29802, United States
| | - Chen Xu
- Marine
& Coastal Environmental Science, Texas
A&M University − Galveston, Galveston, Texas 77553, United States
| | | | - Peter H. Santschi
- Marine
& Coastal Environmental Science, Texas
A&M University − Galveston, Galveston, Texas 77553, United States
| | - Wei Xing
- Savannah
River Ecology Laboratory, University of
Georgia, Aiken, South Carolina 29802, United States
| | - Wendy W. Kuhne
- Savannah
River National Laboratory, Aiken, South Carolina 29808, United States
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Zhang J, Yin X, Ye Z, Chen L, Liu L, Wang X, Zhu Y, Fujita T, Wei Y. Synthesis of Novel Hierarchical Rod-like Mg-Al bimetallic oxides for enhanced removal of uranium (VI) from wastewater. CHEMOSPHERE 2022; 308:136546. [PMID: 36152829 DOI: 10.1016/j.chemosphere.2022.136546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 09/02/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
As one of the most frequently used nuclides for nuclear fuel and toxic heavy metal in polluted solutions, the removal and recovery of U(VI) from wastewater is significant both for nuclear energy and human health. Herein, the novel hierarchical Mg-Al bimetallic oxides (Mg/Al-BOs) were successfully synthesized by a facile hydrothermal-lyophilization-calcination method for enhanced removal of uranium (U(VI)) from wastewater. The as-synthesized Mg/Al-BOs adsorbents were characterized by a variety of techniques including SEM-EDS, XRD, high temperature in-situ XRD, TG-DSC, N2 adsorption-desorption isotherm and XPS. Batch experiments including the effects of pH, hydration species, interfering ions on U(VI) removal, adsorption kinetics, isotherms and recyclability were systematically studied. Results showed that calcined Mg/Al-BO-24 inherited the hierarchical structure from its hydrotalcite-like precursor and grew the bimetallic oxides of Al2O3/MgO into a 3D rod-like and mesoporous network with the large BET surface area (472.4 m2∙g-1), which presented abundant binding sites on the surface and contributed to preventing the aggregation of Al2O3/MgO nanoparticles, allowing the fast uptake of U(VI) for equilibrium within 180 min and the significant increase of maximum adsorption capacity to 411.5 mg∙g-1. The uptake kinetics and isotherms of U(VI) removal could be well represented by the pseudo-second-order and Langmuir models, respectively. Further, it was demonstrated that U(VI) removal by Mg/Al-BO-24 was less influenced by coexisting cations and the regeneration cycles, indicating the excellent selectivity and reusability for U(VI) by the as-prepared composites. Based on the XPS analysis results, the mechanisms for U(VI) sorption onto the Mg/Al-BO-24 were mainly ascribed to the synergistic surface complexation and electrostatic interaction. These results suggested that Mg/Al-BO-24 prepared by the method reported here was available for developing other multiple metal oxides and would be a promising material for the effective treatment of wastewater with U(VI)-contamination.
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Affiliation(s)
- Jie Zhang
- Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China
| | - Xiangbiao Yin
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China.
| | - Zhenxiong Ye
- Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China; College of Chemistry and Chemical Engineering, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China
| | - Lifeng Chen
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China
| | - Linshuai Liu
- Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China
| | - Xinpeng Wang
- Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China.
| | - Yanqiu Zhu
- Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China
| | - Toyohisa Fujita
- Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning, 530004, PR China
| | - Yuezhou Wei
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China; School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China
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Murota K, Saito T. Pore size effects on surface charges and interfacial electrostatics of mesoporous silicas. Phys Chem Chem Phys 2022; 24:18073-18082. [PMID: 35876621 DOI: 10.1039/d2cp02520e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water in confinement becomes more structured than bulk water, and its properties, such as the dielectric constant, change. It remains unclear, however, how the interfacial reactions in confinement, such as the adsorption of ions on the surfaces of small pores, differ from those in larger spaces. We focused on the deprotonation reaction of hydroxyl groups, a fundamental surface reaction, and investigated the dependence of the surface charge density on pore size by determining the surface charge densities of six types of mesoporous silicas with micropores and mesopores at different ionic strengths and pH levels from batch titration tests. The surface complexation model assuming a potential distribution based on the Poisson-Boltzmann equation in cylindrical coordinates was fitted to the obtained surface charge densities to relate the electrostatics near the surface to the surface reaction. The results showed that the absolute values of the surface charge densities decreased with decreasing pore diameter due to the overlap of the electrical double layers. Furthermore, the capacitance of the Stern layer optimized by fitting decreased with decreasing pore diameter, especially in pores smaller than 4 nm in diameter, which suggested that the dielectric constants of water decreased near the surfaces of small pores.
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Affiliation(s)
- Kento Murota
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. .,Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority, 1-9-9 Roppongi, Minato-ku, Tokyo 106-8450, Japan
| | - Takumi Saito
- Nuclear Professional School, School of Engineering, The University of Tokyo, 2-22 Shirakata Shirane, Tokai-mura, Naka-gun, Ibaraki 319-1188, Japan
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Ou T, Wu Y, Han W, Kong L, Song G, Chen D, Su M. Synthesis of thickness-controllable polydopamine modified halloysite nanotubes (HNTs@PDA) for uranium (VI) removal. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127208. [PMID: 34592591 DOI: 10.1016/j.jhazmat.2021.127208] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/19/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
Halloysite nanotubes (HNTs) are considered structurally promising adsorption materials, but their application is limited due to their poor native adsorption properties. Improving the adsorption capacity of HNTs for radioactive U(VI) is of great significance. By controlling the mass ratio of HNTs and dopamine (DA), composite adsorbents (HNTs@PDA) with different polydopamine (PDA) layer thicknesses were synthesized. Characterization of HNTs@PDA demonstrated that the original structure of the HNTs was maintained. Adsorption experiments verified that the adsorption capacity of HNTs@PDA for U(VI) was significantly improved. The effects of solution pH, temperature, and coexisting ions on the adsorption process were investigated. The removal efficiency was observed to be 75% after five repeated uses. The adsorption mechanism of U(VI) by HNTs@PDA can be explained by considering electrostatic interactions and the complexation of C-O, -NH- and C-N/CN in the PDA layer. This study provides some basic information for the application of HNTs for U(VI) removal.
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Affiliation(s)
- Tao Ou
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Yuhua Wu
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Weixing Han
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Lingjun Kong
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
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5
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Ruan Y, Zhang H, Yu Z, Diao Z, Song G, Su M, Hou L, Chen D, Wang S, Kong L. Phosphate enhanced uranium stable immobilization on biochar supported nano zero valent iron. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127119. [PMID: 34597926 DOI: 10.1016/j.jhazmat.2021.127119] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/26/2021] [Accepted: 09/01/2021] [Indexed: 06/13/2023]
Abstract
Uranium (U) immobilization from wastewater by zero valent iron (ZVI) was widely concerned through reduction and surface adsorption. Releasing of U due to re-oxidation of U(IV) into U(VI) limited the application of ZVI in U decontamination. In this work, a kind of biochar supported nano zero valent iron (Fe/BC(900)) was obtained by carbothermal reduction of starch mixed with ferric nitrate at 900 °C. U immobilization behavior by Fe/BC(900) in the presence of phosphate (P) was investigated. The U immobilization reaction was adjusted by controlling the sequence of U, Fe/BC(900) and P. U immobilization efficiency was enhanced to 99.9% in the presence of P. Reaction sequence of U, Fe/BC(900) and P influenced the U immobilization efficiency, which followed the order of (U-P)+Fe/BC(900)>(U- Fe/BC(900))+P>U+Fe/BC(900)>(P-Fe/BC(900))+U. P and nZVI both contributed to enhancing U immobilization through precipitation of uranyl-P and reductive co-precipitate (U(IV)) in a wide pH range. The released Fe ions could precipitate with uranyl and phosphate. Consumption of P and nZVI in the (P-Fe/BC(900))+U system limited U immobilization ability. The precipitate is highly dependent on U, P and Fe elements. U desorption in (U-P)+Fe/BC(900) system was not observed with stability.
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Affiliation(s)
- Yang Ruan
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Huimin Zhang
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zijing Yu
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zenghui Diao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Li'an Hou
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Shuao Wang
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Lingjun Kong
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
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6
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Shukla SK, Hariharan S, Rao TS. Uranium bioremediation by acid phosphatase activity of Staphylococcus aureus biofilms: Can a foe turn a friend? JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121316. [PMID: 31607578 DOI: 10.1016/j.jhazmat.2019.121316] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/13/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
In this study, Staphylococcus aureus biofilms, which are considered a foe for being pathogenic, were tested for their uranium bioremediation capacity to find out if they can turn out to be a friend. Acid phosphatase activity, which is speculated to aid in bio-precipitation of U(VI) from uranyl nitrate solution, was assayed in biofilms of seven different S. aureus strains. The presence of acid phosphatase enzyme was detected in the biofilms of all S. aureus strains (in the range of 3.1 ± 0.21 to 26.90 ± 2.32 μi.u./g), and found to be higher when compared to that of their planktonic phenotypes. Among all, S. aureus V329 biofilm showed highest biofilm formation ability along with maximum phosphatase activity (26.9 ± 2.32 μi.u./g of biomass). Addition of phosphate enhanced the U(VI) remediation when treated with uranyl nitrate solution. S. aureus V329 biofilm showed significant U tolerance with only a 3-log reduction when exposed to 10 ppm U(VI) for 1 h. When treated in batch mode, V329 biofilm successfully remediated up to 47% of the 10 ppm U(VI). This new approach using the acid phosphatase from the S. aureus V329 biofilm presents an alternative method for the remediation of uranium contamination.
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Affiliation(s)
- Sudhir K Shukla
- Biofouling & Thermal Ecology Section, Water & Steam Chemistry Division, BARC Facilities, Kalpakkam, Tamil Nadu, 603102, India
| | - S Hariharan
- Department of Biotechnology, Sri Venkateswara College of Engineering, Sriperumbudur, Chennai, 602117, India
| | - T Subba Rao
- Biofouling & Thermal Ecology Section, Water & Steam Chemistry Division, BARC Facilities, Kalpakkam, Tamil Nadu, 603102, India; Homi Bhabha National Institute, Mumbai, 400094, India.
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7
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Lu S, Zhu K, Hayat T, Alharbi NS, Chen C, Song G, Chen D, Sun Y. Influence of carbonate on sequestration of U(VI) on perovskite. JOURNAL OF HAZARDOUS MATERIALS 2019; 364:100-107. [PMID: 30342289 DOI: 10.1016/j.jhazmat.2018.10.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/11/2018] [Accepted: 10/12/2018] [Indexed: 06/08/2023]
Abstract
Cubic perovskite (CaTiO3) was successfully synthesized by a facile solvothermal method and was utilized to sequestrate U(VI) from aqueous solutions. The batch experiments revealed that carbonate inhibited U(VI) sequestration at pH > 6.0 due to the formation of uranyl-carbonate complexes. The maximum sequestration capacity of U(VI) on perovskite was 119.3 mg/g (pH 5.5). The sequestration mechanism of U(VI) on perovskite were investigated by XPS and EXAFS techniques. According to XPS analysis, the presence of U(IV) and U(VI) oxidation states revealed the photocatalytic reduction of U(VI) by perovskite under UV-vis irradiation. In addition, photocatalytic reduction performance significantly decreased in the presence of carbonate. Based on EXAFS analysis, the occurrence of U-Ti and U-U shells revealed the inner-sphere surface complexation and reductive precipitation of U(VI) on perovskite. These findings herein are crucial for the application of perovskite-based composites in the decontamination of U(VI) in aquatic environmental cleanup.
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Affiliation(s)
- Songhua Lu
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China; Key Laboratory of Photovoltaic and Energy Conversation, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China
| | - Kairuo Zhu
- Key Laboratory of Photovoltaic and Energy Conversation, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China
| | - Tasawar Hayat
- NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Njud S Alharbi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Changlun Chen
- Key Laboratory of Photovoltaic and Energy Conversation, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China; NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou, 510006, PR China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou, 510006, PR China
| | - Yubing Sun
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China.
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Wu W, Chen D, Li J, Su M, Chen N. Enhanced adsorption of uranium by modified red muds: adsorption behavior study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:18096-18108. [PMID: 29691747 DOI: 10.1007/s11356-018-2027-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 04/12/2018] [Indexed: 06/08/2023]
Abstract
Uranium is a hazardous and radioactive element. Effective removal of uranium from wastewater stream requires advanced functional materials and reliable technologies. Red mud is a type of low-cost adsorbent which is widely used in the adsorption process. In the present work, we successfully modified the raw red mud to gain a series of highly efficient sorbents for uranium removal. They are nitric acid dealkalized red mud (DRM), aluminum nitrate modified red mud (ARM), and ferric nitrate modified red mud (FRM). The adsorption efficiencies of uranium(VI) by DRM, ARM, and FRM were 74.50, 95.56, and 98.75% in their optimal immobilization regions, respectively. The chemisorption of uranium dominates the adsorption process of FRM, while as to physical adsorption dominates the adsorption process of ARM and DRM. Both DRM and ARM reached their maximum adsorption capacities at 10 min while that for FRM occurred at 30 min. FRM performed much stronger anti-interference ability to the influence of carbonate and calcium. The outstanding adsorption ability of these modified red muds is mainly due to the enhancement of ion exchange, co-precipitation, and electrostatic attraction by red mud's active components and functional groups.
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Affiliation(s)
- Wanying Wu
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 51006, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 51006, China
| | - Jinwen Li
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 51006, China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 51006, China.
| | - Nan Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 51006, China.
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Shin W, Oh J, Choung S, Cho BW, Lee KS, Yun U, Woo NC, Kim HK. Distribution and potential health risk of groundwater uranium in Korea. CHEMOSPHERE 2016; 163:108-115. [PMID: 27522182 DOI: 10.1016/j.chemosphere.2016.08.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/01/2016] [Accepted: 08/02/2016] [Indexed: 06/06/2023]
Abstract
Chronic exposure even to extremely low specific radioactivity of natural uranium in groundwater results in kidney problems and potential toxicity in bones. This study was conducted to assess the potential health risk via intake of the groundwater containing uranium, based on the determination of the uranium occurrence in groundwater. The groundwater was investigated from a total of 4140 wells in Korea. Most of the groundwater samples showed neutral pH and (sub-)oxic condition that was influenced by the mixing with shallow groundwater due to long-screened (open) wells. High uranium contents exceeding the WHO guideline level of 30 μg L(-1) were observed in the 160 wells located mainly in the plutonic bedrock regions. The statistical analysis suggested that the uranium component was present in groundwater by desorption and re-dissolution processes. Predominant uranium phases were estimated to uranyl carbonates under the Korean groundwater circumstances. These mobile forms of uranium and oxic condition facilitate the increase of potential health risk downgradient. In particular, long-term intake of groundwater containing >200 μg U L(-1) may induce internal exposure to radiation as well as the effects of chemical toxicity. These high uranium concentrations were found in twenty four sampling wells of rural areas in this study, and they were mainly used for drinking. Therefore, the high-level uranium wells and neighboring areas must be properly managed and monitored to reduce the exposure risk for the residents by drinking groundwater.
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Affiliation(s)
- Woosik Shin
- Division of Earth and Environmental Sciences, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea; Department of Earth System Sciences, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jungsun Oh
- Korea Agency for Infrastructure Technology Advancement (KAIA), Anyang, 14066, Republic of Korea
| | - Sungwook Choung
- Division of Earth and Environmental Sciences, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea.
| | - Byong-Wook Cho
- Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, 34132, Republic of Korea.
| | - Kwang-Sik Lee
- Division of Earth and Environmental Sciences, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea
| | - Uk Yun
- Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, 34132, Republic of Korea
| | - Nam-Chil Woo
- Department of Earth System Sciences, Yonsei University, Seoul, 03722, Republic of Korea
| | - Hyun Koo Kim
- Soil and Groundwater Research Division, National Institute Environmental Research (NIER), Incheon, 22689, Republic of Korea
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Zachara J, Brantley S, Chorover J, Ewing R, Kerisit S, Liu C, Perfect E, Rother G, Stack AG. Internal Domains of Natural Porous Media Revealed: Critical Locations for Transport, Storage, and Chemical Reaction. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:2811-2829. [PMID: 26849204 DOI: 10.1021/acs.est.5b05015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Internal pore domains exist within rocks, lithic fragments, subsurface sediments, and soil aggregates. These domains, termed internal domains in porous media (IDPM), represent a subset of a material's porosity, contain a significant fraction of their porosity as nanopores, dominate the reactive surface area of diverse media types, and are important locations for chemical reactivity and fluid storage. IDPM are key features controlling hydrocarbon release from shales in hydraulic fracture systems, organic matter decomposition in soil, weathering and soil formation, and contaminant behavior in the vadose zone and groundwater. Traditionally difficult to interrogate, advances in instrumentation and imaging methods are providing new insights on the physical structures and chemical attributes of IDPM, and their contributions to system behaviors. Here we discuss analytical methods to characterize IDPM, evaluate information on their size distributions, connectivity, and extended structures; determine whether they exhibit unique chemical reactivity; and assess the potential for their inclusion in reactive transport models. Ongoing developments in measurement technologies and sensitivity, and computer-assisted interpretation will improve understanding of these critical features in the future. Impactful research opportunities exist to advance understanding of IDPM, and to incorporate their effects in reactive transport models for improved environmental simulation and prediction.
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Affiliation(s)
- John Zachara
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sue Brantley
- Penn State University , University Park, Pennsylvania 16802, United States
| | - Jon Chorover
- University of Arizona , Tucson, Arizona 85721, United States
| | - Robert Ewing
- Iowa State University , Ames, Iowa 50011, United States
| | - Sebastien Kerisit
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Chongxuan Liu
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Edmund Perfect
- University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Gernot Rother
- Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Andrew G Stack
- Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
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11
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Zou L, Chen Z, Zhang X, Liu P, Li X. Phosphate promotes uranium (VI) adsorption in Staphylococcus aureus LZ-01. Lett Appl Microbiol 2014; 59:528-34. [PMID: 25065820 DOI: 10.1111/lam.12310] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 06/03/2014] [Accepted: 07/23/2014] [Indexed: 11/26/2022]
Abstract
UNLABELLED Staphylococcus aureus LZ-01 was isolated from the Yellow River upstream from Lanzhou which can resist and reduce chromium (VI) to chromium (III). In this study, strain LZ-01's uranium (VI) resistance and adsorption abilities were investigated. Our results showed that it can resist 2 mmol l(-1) U(VI) and adsorb 96% of 2 mmol l(-1) U(VI) after 6 h incubation. Transmission electron microscopy (TEM) images showed that precipitates were formed on the surface of the cells. Energy dispersive X-ray spectroscopy (EDX) analysis indicated that the precipitates contained uranium and phosphorus. The U(VI) adsorption rate of strain LZ-01 was promoted by 20 mmol l(-1) phosphate. It adsorbed 45% of 2·5 mmol l(-1) U(VI) in 30 min compared to 36% without phosphate (P < 0·05). Strain LZ-01 can resist heavy metals and survive in nuclear waste-contaminated environments. Strain LZ-01 might be a potential candidate for nuclear waste remediation with phosphate added. SIGNIFICANCE AND IMPACT OF THE STUDY Staphylococcus aureus LZ-01 can resist 2 mmol l(-1) U(VI). It could adsorb more than 90% of the 2 mmol l(-1) U(VI) in 6 h. Uranium is precipitated with phosphorus on the surface of the cells. Phosphate promotes uranium adsorption in strain LZ-01, and its U(VI) adsorption capacity is related to its cell availability. These results indicate that the strain LZ-01 might be a potential candidate for remediation of nuclear waste when phosphate is added.
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Affiliation(s)
- L Zou
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Lanzhou University, Lanzhou, Gansu, China
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12
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Yang Q, Smitherman P, Hess CT, Culbertson CW, Marvinney RG, Smith AE, Zheng Y. Uranium and radon in private bedrock well water in Maine: geospatial analysis at two scales. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:4298-4306. [PMID: 24655434 PMCID: PMC3993615 DOI: 10.1021/es405020k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 03/20/2014] [Accepted: 03/21/2014] [Indexed: 05/29/2023]
Abstract
In greater Augusta of central Maine, 53 out of 1093 (4.8%) private bedrock well water samples from 1534 km(2) contained [U] >30 μg/L, the U.S. Environmental Protection Agency's (EPA) Maximum Contaminant Level (MCL) for drinking water; and 226 out of 786 (29%) samples from 1135 km(2) showed [Rn] >4,000 pCi/L (148 Bq/L), the U.S. EPA's Alternative MCL. Groundwater pH, calcite dissolution and redox condition are factors controlling the distribution of groundwater U but not Rn due to their divergent chemical and hydrological properties. Groundwater U is associated with incompatible elements (S, As, Mo, F, and Cs) in water samples within granitic intrusions. Elevated [U] and [Rn] are located within 5-10 km distance of granitic intrusions but do not show correlations with metamorphism at intermediate scales (10(0)-10(1) km). This spatial association is confirmed by a high-density sampling (n = 331, 5-40 samples per km(2)) at local scales (≤10(-1) km) and the statewide sampling (n = 5857, 1 sample per 16 km(2)) at regional scales (10(2)-10(3) km). Wells located within 5 km of granitic intrusions are at risk of containing high levels of [U] and [Rn]. Approximately 48 800-63 900 and 324 000 people in Maine are estimated at risk of exposure to U (>30 μg/L) and Rn (>4000 pCi/L) in well water, respectively.
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Affiliation(s)
- Qiang Yang
- Columbia
University, Lamont-Doherty Earth Observatory, 61 route 9W, Palisades, New York 10964, United States
- City
University of New York, Graduate Center
and Queens College, 65-30
Kissena Blvd., Flushing, New York 11367, United
States
| | - Paul Smitherman
- University
of Maine, Department of Physics and Astronomy, 120 Bennett Hall, Orono, Maine 04469, United States
| | - C. T. Hess
- University
of Maine, Department of Physics and Astronomy, 120 Bennett Hall, Orono, Maine 04469, United States
| | - Charles W. Culbertson
- U.S. Geological
Survey, Maine Water Science Center, 196 Whitten Road, Augusta, Maine, 04330, United
States
| | - Robert G. Marvinney
- Maine Geological
Survey, 93 State House Station, Augusta, Maine, 04333, United States
| | - Andrew E. Smith
- Maine Center for Disease
Control and Prevention, 286 Water Street,
State House Station 11, Augusta, Maine 04333, United
States
| | - Yan Zheng
- Columbia
University, Lamont-Doherty Earth Observatory, 61 route 9W, Palisades, New York 10964, United States
- City
University of New York, Graduate Center
and Queens College, 65-30
Kissena Blvd., Flushing, New York 11367, United
States
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13
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Bai ZQ, Li ZJ, Wang CZ, Yuan LY, Liu ZR, Zhang J, Zheng LR, Zhao YL, Chai ZF, Shi WQ. Interactions between Th(iv) and graphene oxide: experimental and density functional theoretical investigations. RSC Adv 2014. [DOI: 10.1039/c3ra45938a] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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14
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Wang YL, Zhu L, Guo BL, Chen SW, Wu WS. Mesoporous silica SBA-15 functionalized with phosphonate derivatives for uranium uptake. NEW J CHEM 2014. [DOI: 10.1039/c3nj01494k] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Good selective sorption ability of SBA-15-PA for U(VI).
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Affiliation(s)
- Yu-Long Wang
- School of Nuclear Science and Technology
- Lanzhou University
- Lanzhou, PR China
| | - Lu Zhu
- School of Nuclear Science and Technology
- Lanzhou University
- Lanzhou, PR China
| | - Bo-Long Guo
- School of Nuclear Science and Technology
- Lanzhou University
- Lanzhou, PR China
| | - Su-Wen Chen
- School of Nuclear Science and Technology
- Lanzhou University
- Lanzhou, PR China
| | - Wang-Suo Wu
- School of Nuclear Science and Technology
- Lanzhou University
- Lanzhou, PR China
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15
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Ivanova B, Spiteller M. Uranyl-water-containing complexes: solid-state UV-MALDI mass spectrometric and IR spectroscopic approach for selective quantitation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:1548-1563. [PMID: 23942998 DOI: 10.1007/s11356-013-1892-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Accepted: 05/30/2013] [Indexed: 06/02/2023]
Abstract
Since primary environmental concept for long storage of nuclear waste involved assessment of water in uranium complexes depending on migration processes, the paper emphasized solid-state matrix-assisted laser desorption/ionization (MALDI) mass spectrometric (MS) and IR spectroscopic determination of UO2(NO3)2·6H2O; UO2(NO3)2·3H2O, α-, β-, and γ-UO3 modifications; UO3·xH2O (x = 1 or 2); UO3·H2O, described chemically as UO2(OH)2, β- and γ-UO2(OH)2 modifications; and UO4·2H2O, respectively. Advantages and limitation of vibrational spectroscopic approach are discussed, comparing optical spectroscopic data and crystallographic ones. Structural similarities occurred in α-γ modifications of UO3, and UO2(OH)2 compositions are analyzed. Selective speciation achieved by solid-state mass spectrometry is discussed both in terms of its analytical contribution for environmental quality assurance and assessment of radionuclides, and fundamental methodological interest related the mechanistic complex water exchange of UO3·H2O forms in the gas phase. In addition to high selectivity and precision, UV-MALDI-MS, employing an Orbitrap analyzer, was a method that provided fast steps that limited sample pretreatment techniques for direct analysis including imaging. Therefore, random and systematic errors altering metrology and originating from the sample pretreatment stages in the widely implemented analytical protocols for environmental sampling determination of actinides are significantly reduced involving the UV-MALDI-Orbitrap-MS method. The method of quantum chemistry is utilized as well to predict reliably the thermodynamics and nature of U-O bonds in uranium species in gas and condensed phases.
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Affiliation(s)
- Bojidarka Ivanova
- Lehrstuhl für Analytische Chemie, Institut für Umweltforschung, Fakultät für Chemie, Universität Dortmund, Otto-Hahn-Strasse 6, 44227, Dortmund, Nordrhein-Westfalen, Germany,
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16
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Li X, Zhang M, Liu Y, Li X, Liu Y, Hua R, He C. Removal of U(VI) in Aqueous Solution by Nanoscale Zero-Valent Iron(nZVI). ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s12403-013-0084-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Yu J, Li Z, Liu Q, Wang J, Wei H, Zhang M, Liu L. Uranium(vi) adsorption on alumina hollow microspheres synthesized via a facile self-templating process. RSC Adv 2013. [DOI: 10.1039/c3ra23494k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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