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Yin X, Wu P, Shi S, Zhao Y, Li H, Li F, Liao J, Liu N, Yang Y, Lan T. Sorption behavior and mechanism of U(VI) on Tamusu clay in the presence of U(VI)-CO 3 complexes. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2023; 270:107286. [PMID: 37633243 DOI: 10.1016/j.jenvrad.2023.107286] [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: 06/06/2023] [Revised: 08/17/2023] [Accepted: 08/20/2023] [Indexed: 08/28/2023]
Abstract
The sorption behavior of U(VI) on Tamusu clay sampled from a pre-selected high-level radioactive waste (HLW) disposal site in Inner Mongolia (China) was studied systematically in the U(VI)-CO3 solution at pH 7.8 by batch experiments. The results demonstrated that the distribution coefficients (Kd) decreased with the increasing values of pHinitial, [U(VI)]initial, and ionic strength, but increased with the extended time and the rising temperature. The sorption was a pH-dependent, heterogeneous, spontaneous, and endothermic chemical process, which could be better described by Freundlich isothermal model and pseudo-second-order kinetic model. The presence of humic acid (HA) or fulvic acid (FA) significantly inhibited the U(VI) sorption, due to the enhanced electrostatic repulsion between the negatively charged HA/FA adsorbed on the clay surface and the negative U(VI) species, as well as the well dispersed HA/FA aggregates in solution wrapping the U(VI) species. The FTIR and XPS spectra indicated that the HCO3- groups on the surface of Tamusu clay after hydroxylation and the ‒OH groups in HA/FA were involved in the U(VI) sorption. The results reported here provide valuable insights into the further understanding of U(VI) migration in geological media.
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Affiliation(s)
- Xiaoyu Yin
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China
| | - Peng Wu
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China
| | - Shilong Shi
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China
| | - Yufan Zhao
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China
| | - Honghui Li
- China Institute for Radiation Protection, Taiyuan, 030006, PR China
| | - Feize Li
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China
| | - Jiali Liao
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China
| | - Ning Liu
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China
| | - Yuanyou Yang
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China.
| | - Tu Lan
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China.
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2
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Mu W, Yu Y, Sun H, Zhu Z, Li J, Liang W. Fabrication of ATP/PEG/MnO 2NWs composite for solar steam generation with high conversion efficiency. J Colloid Interface Sci 2023; 648:916-924. [PMID: 37329603 DOI: 10.1016/j.jcis.2023.06.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 05/20/2023] [Accepted: 06/09/2023] [Indexed: 06/19/2023]
Abstract
Solar steam generation is widely used in seawater desalination because of its high efficiency and environmental protection. However, using low-cost materials to produce efficient solar evaporators is a severe challenge. In this study, a porous carbon material was prepared by combining Attapulgite (ATP), Polyethylene glycol (PEG) and Manganese dioxide nanowires (MnO2NWs) composite, through freeze-drying and high-temperature carbonization. The prepared CAPM aerogel shows a three-dimensional porous structure, which has high evaporation properties in pure water and simulated seawater. Under 1 sun simulated illumination, the pure water evaporation is 1.4574 kg m-2h-1 and the corresponding energy conversion efficiency is 85.94%. The prepared CAPM aerogel showed excellent durability and salt tolerance in 20%Nacl solution, indicating that the CAPM has excellent desalinization performance. In addition, CAPM aerogel has and exhibits super hydrophilic properties, which can transfer water molecules quickly. Due to the advantages of low cost, simple preparation method, and high solar energy conversion efficiency, the CAPM has excellent potential as a photothermal material for solar energy generation.
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Affiliation(s)
- Wenxiao Mu
- College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China
| | - Yuan Yu
- College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China
| | - Hanxue Sun
- College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China
| | - Zhaoqi Zhu
- College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China
| | - Jiyan Li
- College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China
| | - Weidong Liang
- College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China.
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Studies towards the adsorption of Sulphate Ions from Acid Mine Drainage by modified Attapulgite clays. SOUTH AFRICAN JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1016/j.sajce.2022.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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4
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Zheng Y, Wang Y, Yang X, Gao J, Xu G, Yuan J. Effective mechanisms of water purification for nitrogen-modified attapulgite, volcanic rock, and combined exogenous microorganisms. Front Microbiol 2022; 13:944366. [PMID: 36033894 PMCID: PMC9399813 DOI: 10.3389/fmicb.2022.944366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 07/15/2022] [Indexed: 12/07/2022] Open
Abstract
The study tested the water purification mechanism of the combination of microorganisms and purification materials via characteristic, enzymatic, and metagenomics methods. At 48 h, the removal rates of total nitrogen, total phosphorous, and Mn chemical oxygen demand in the combination group were 46.91, 50.93, and 65.08%, respectively. The alkaline phosphatase (AKP) activity increased during all times tested in the volcanic rock, Al@TCAP, and exogenous microorganism groups, while the organophosphorus hydrolase (OPH), dehydrogenase (DHO), and microbial nitrite reductase (NAR) activities increased at 36-48, 6-24, and 36-48 h, respectively. However, the tested activities only increased in the combination groups at 48 h. Al@TCAP exhibits a weak microbial loading capacity, and the Al@TCAP removal is primarily attributed to adsorption. The volcanic rock has a sufficient ability to load microorganisms, and the organisms primarily perform the removal for improved water quality. The predominant genera Pirellulaceae and Polynucleobacter served as the sensitive biomarkers for the treatment at 24, 36-48 h. Al@TCAP increased the expression of Planctomycetes and Actinobacteria, while volcanic rock increased and decreased the expression of Planctomycetes and Proteobacteria. The growth of Planctomycetes and the denitrification reaction were promoted by Al@TCAP and the exogenous microorganisms. The purification material addition group decreased the expression of Hyaloraphidium, Chytridiomycetes (especially Hyaloraphidium), and Monoblepharidomycetes and increased at 36-48 h, respectively. Ascomycota, Basidiomycota, and Kickxellomycota increased in group E, which enhanced the nitrogen cycle through microbial enzyme activities, and the growth of the genus Aspergillus enhanced the phosphorous purification effect.
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Affiliation(s)
- Yao Zheng
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, China
- Wuxi Fishery College, Nanjing Agricultural University, Wuxi, China
| | - Yuqin Wang
- Wuxi Fishery College, Nanjing Agricultural University, Wuxi, China
| | - Xiaoxi Yang
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, China
| | - Jiancao Gao
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, China
| | - Gangchun Xu
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, China
- Wuxi Fishery College, Nanjing Agricultural University, Wuxi, China
- *Correspondence: Gangchun Xu,
| | - Julin Yuan
- Key Laboratory of Healthy Freshwater Aquaculture, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fish Health and Nutrition of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou, China
- Julin Yuan,
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MOF modified with copolymers containing carboxyl and amidoxime groups and high efficiency U (VI) extraction from seawater. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120946] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Liu W, Huang Y, Huang G, Fan L, Xie Y, Shi J. Eco-friendly and low-cost amidoxime-functionalized microcrystalline cellulose/mesoporous silica composite for the selective adsorption of U(VI) from aqueous solution. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08261-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wang D, Zhang J, Cao R, Zhang Y, Li J. The detection and characterization techniques for the interaction between graphene oxide and natural colloids: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 808:151906. [PMID: 34838546 DOI: 10.1016/j.scitotenv.2021.151906] [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: 09/17/2021] [Revised: 11/16/2021] [Accepted: 11/19/2021] [Indexed: 06/13/2023]
Abstract
The high dispersibility of graphene oxide (GO) and the universality of natural colloids (clay minerals, (hydr)oxides of Al, Fe, silica, etc.) make them interact easily. Many kinds of analytical methods have been used to study the interaction between GO and natural colloids. This review provides a comprehensive overview of analytical methods for the detection and quantification of interaction process. We highlighted the influence of the most relevant environmental factors (ionic strength, pH, etc.) on batch experiment, quartz crystal microbalance with dissipation monitoring measurements, and column experiments. Besides, the benefits and drawbacks of spectroscopic, microscopic techniques, theoretical models, calculation and time-resolved dynamic light scattering methods also have discussed in this work. This review can give some guidance to researchers in their selection and combination of the technique for the research of the interaction between GO and natural colloids.
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Affiliation(s)
- De Wang
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230026, PR China
| | - Jianfeng Zhang
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230026, PR China
| | - Ruya Cao
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230026, PR China
| | - Yingzi Zhang
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230026, PR China
| | - Jiaxing Li
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230026, PR China; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, PR China.
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Yin M, Sun J, He H, Liu J, Zhong Q, Zeng Q, Huang X, Wang J, Wu Y, Chen D. Uranium re-adsorption on uranium mill tailings and environmental implications. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126153. [PMID: 34492934 DOI: 10.1016/j.jhazmat.2021.126153] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 05/15/2021] [Accepted: 05/15/2021] [Indexed: 06/13/2023]
Abstract
Uranium mill tailings (UMTs) are one critical source of environmental U pollution. Leaching test has been extensively used to reveal U release capacity and mechanism from UMTs, while little attention has been paid to the effects of re-adsorption process on U release. In this study, the role of U re-adsorption behaviors during leaching test with UMTs was comprehensively investigated. Through paired data on mineralogical composition and aqueous U speciation, the influence of environmentally relevant factors on U re-absorption capacity and mechanism on UMTs with different particle sizes was revealed. Significant amounts of U re-adsorption were observed and primarily attributed to the adsorption on chlorite, albite and muscovite as well as combined reduction-sequestration by muscovite. Uranium re-adsorption predominantly occurred via inner-sphere complexation and surface precipitation depending on leachant pH. Coexisting sulfate or phosphate could further enhance U re-adsorption. The enhanced re-adsorption from sulfate occurred when inner-sphere complexation governed the re-adsorption process. These findings suggest that the environmental hazards and ecological risks of the U containing (waste) solids might have been underestimated due to the ignorance of the re-adsorption process, since the re-adsorbed U could be easily re-mobilized. The insights from this study are also helpful in developing effective in-situ remediation strategies.
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Affiliation(s)
- Meiling Yin
- Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Jing Sun
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Hongping He
- Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Juan Liu
- Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Qiaohui Zhong
- Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Qingyi Zeng
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
| | - Xianfeng Huang
- School of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
| | - Jin Wang
- Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China.
| | - Yingjuan Wu
- Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Diyun Chen
- Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China
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9
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Zhao M, Cui Z, Pan D, Fan F, Tang J, Hu Y, Xu Y, Zhang P, Li P, Kong XY, Wu W. An Efficient Uranium Adsorption Magnetic Platform Based on Amidoxime-Functionalized Flower-like Fe 3O 4@TiO 2 Core-Shell Microspheres. ACS APPLIED MATERIALS & INTERFACES 2021; 13:17931-17939. [PMID: 33821605 DOI: 10.1021/acsami.1c00556] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Efficient removal of uranium (U) from aqueous solutions is crucial for ecological safety. Functionalized magnetic nanoparticles provide a promising strategy for radionuclide recovery and separation. However, designing and synthesizing magnetic adsorbents with high sorption capacity and selectivity, accompanied by excellent stability and reusability, remain a challenge. In this work, novel amidoxime-functionalized flower-like magnetic Fe3O4@TiO2 core-shell microspheres are designed and synthesized to efficiently remove U(VI) from aqueous solutions and actual seawater. The magnetic Fe3O4 core facilitates easy separation by an external magnetic field, and flower-like TiO2 nanosheets provide abundant specific surface areas and functionalization sites. The grafted amidoxime (AO) groups could function as a claw for catching uranium. The maximum adsorption capacity on U(VI) of the designed nanospheres reaches 313.6 mg·g-1 at pH 6.0, and the adsorption efficiency is maintained at 97% after 10 cycles. In addition, the excellent selectivity of the magnetic recyclable AO-functioning Fe3O4@TiO2 microspheres endows the potential of uranium extraction from seawater. The designed material provides an effective and applicable diagram for radioactive element elimination and enrichment.
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Affiliation(s)
- Min Zhao
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Zhenpeng Cui
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Duoqiang Pan
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Fuyou Fan
- Division of Ionizing Radiation, National Institute of Metrology, Beijing 100029, China
| | - Junhao Tang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Yameng Hu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Yang Xu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Pengcheng Zhang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Ping Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Xiang-Yu Kong
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wangsuo Wu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
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10
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11
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Magnetic nanoparticles for the recovery of uranium from sea water: Challenges involved from research to development. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.07.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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12
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Araújo CM, das Virgens Santana M, do Nascimento Cavalcante A, Nunes LCC, Bertolino LC, de Sousa Brito CAR, Barreto HM, Eiras C. Cashew-gum-based silver nanoparticles and palygorskite as green nanocomposites for antibacterial applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 115:110927. [DOI: 10.1016/j.msec.2020.110927] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 03/09/2020] [Accepted: 04/01/2020] [Indexed: 01/06/2023]
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13
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Chen M, Gao Y, Fu B, Yang F. A Tandem Adsorption-Catalysis Strategy for the Removal of Copper Ions and Catalytic Reduction of 4-Nitrophenol. ACS OMEGA 2020; 5:23372-23377. [PMID: 32954189 PMCID: PMC7496003 DOI: 10.1021/acsomega.0c03329] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
In this work, a consecutive adsorption-catalysis approach to remove Cu2+ ions and catalytic reduction of 4-nitrophenol (4-NP) is proposed. Attapulgite (ATP) nanorods are utilized as adsorbents to enrich Cu2+ ions from contaminated water. Subsequently, the adsorbed ions were in situ reduced to construct Cu-loaded ATP catalysts. The catalytic activities of the composite ATP-Cu catalysts are evaluated by 4-NP reduction in the presence of NaBH4. The optimal ATP-Cu50 sample prepared by putting ATP into a 50 mg L-1 CuSO4 solution could complete the catalytic reaction within 4 min. Moreover, the Cu-deposited ATP nanorods can be integrated into a continuous flow catalytic system, and the 4-NP can be rapidly reduced. This method sheds lights on the fabrication of ATP-based hybrid catalysts and the removal of multiple water pollutants.
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Affiliation(s)
- Muhua Chen
- College
of Chemical Engineering, Jiangsu Key Lab for the Chemistry & Utilization
of Agricultural and Forest Biomass, Nanjing
Forestry University, Nanjing 210037, China
| | - Yingyun Gao
- College
of Chemical Engineering, Jiangsu Key Lab for the Chemistry & Utilization
of Agricultural and Forest Biomass, Nanjing
Forestry University, Nanjing 210037, China
| | - Bo Fu
- College
of Chemical Engineering, Jiangsu Key Lab for the Chemistry & Utilization
of Agricultural and Forest Biomass, Nanjing
Forestry University, Nanjing 210037, China
| | - Fan Yang
- School
of Management Science and Engineering, Nanjing
University of Finance and Economics, Nanjing, Jiangsu 210023, China
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Ji J, Xie W. Removal of aflatoxin B 1 from contaminated peanut oils using magnetic attapulgite. Food Chem 2020; 339:128072. [PMID: 33152867 DOI: 10.1016/j.foodchem.2020.128072] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 10/23/2022]
Abstract
The efficient magnetic adsorbent (Fe3O4@ATP) was prepared by precipitation through the dispersion of Fe3O4 nanoparticles on the natural attapulgite (ATP) and then tested as an adsorbent for aflatoxin B1 (AFB1) removal from contaminated oils. The adsorbent characterization results revealed that the Fe3O4 were incorporated into the ATP, affording the Fe3O4@ATP composite. This magnetic composite displayed a good ability to eliminate AFB1 from contaminated oils with a removal efficiency of 86.82% using a 0.3% dosage. The Fe3O4@ATP possessed paramagnetic character with a saturation magnetization of 50.86 emu/g, enabling its easy separation from the medium using an external magnet. The adsorption process followed the pseudo-second-order model and fitted the Freundlich isotherm well. Moreover, the thermodynamic studies showed that AFB1 adsorption onto Fe3O4@ATP was exothermic and spontaneous. The novelty of this study lies in the fabrication of magnetic composite adsorbents for AFB1 elimination from oils.
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Affiliation(s)
- Junmin Ji
- College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, PR China
| | - Wenlei Xie
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, PR China.
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Wang Y, Wang J, Wang J, Liang J, Pan D, Li P, Fan Q. Efficient recovery of uranium from saline lake brine through photocatalytic reduction. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113007] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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16
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Jiexin L, Pengfei Y, Chunxia Z, Wenxiong Q, Guojun K, Yong L. Preparation of sulfhydryl functionalized magnetic SBA-15 and its high-efficiency adsorption on uranyl ion in solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:34487-34498. [PMID: 31642018 DOI: 10.1007/s11356-019-06329-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 08/26/2019] [Indexed: 06/10/2023]
Abstract
A novel assembly method was used to prepare the sulfhydryl functionalized magnetic SBA-15 (SH-M-SBA-15). The physicochemical properties of SH-M-SBA-15 were characterized by TEM, XRD, EDS, FT-IR, BET, and VSM. Batch adsorption experiments were conducted to investigate the influence of initial uranium concentration, dosage of adsorbent, pH values, contact time, and temperature on the adsorption efficiency and behaviors. The adsorption types were analyzed from the aspects of kinetic, isotherms, and thermodynamic. The results show that the specific surface area of SH-M-SBA-15 is 316.67 m2/g, which is smaller than that of SBA-15 (692.18 m2/g). However, compared with SBA-15, SH-M-SBA-15 has more surface sulfhydryl functional groups. The addition of this group can improve the adsorption of uranyl ions by SH-M-SBA-15. The optimal adsorption conditions were adsorption dosage 40 mg/L, pH 6, temperature 35 °C, contact time 180 min, and initial uranium concentration 35 mg/L. Under this condition, the maximum adsorption amount of uranyl ion by SH-M-SBA-15 can reach 804.79 mg/g, which is much higher than the highest adsorption capacity of uranyl ion by SBA-15 (146.23 mg/g). The adsorption process was better depicted by the Langmuir isotherm model. The process was consistent with the quasi-second-order model. ΔG was negative and ΔH was positive, indicating spontaneous and endothermic adsorption.
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Affiliation(s)
- Li Jiexin
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Yang Pengfei
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, Hunan, China.
- Hunan Province Engineering Research Center of Radioactive Control Technology in Uranium Mining and Metallurgy & Hunan Province Engineering Technology Research Center of Uranium Tailings Treatment Technology, University of South China, Hengyang, 421001, Hunan, China.
| | - Zhu Chunxia
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Qiao Wenxiong
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Ke Guojun
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Liu Yong
- Hunan Province Engineering Research Center of Radioactive Control Technology in Uranium Mining and Metallurgy & Hunan Province Engineering Technology Research Center of Uranium Tailings Treatment Technology, University of South China, Hengyang, 421001, Hunan, China
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Niu Z, Wei X, Qiang S, Wu H, Pan D, Wu W, Fan Q. Spectroscopic studies on U(VI) incorporation into CaCO 3: Effects of aging time and U(VI) concentration. CHEMOSPHERE 2019; 220:1100-1107. [PMID: 33395797 DOI: 10.1016/j.chemosphere.2019.01.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 12/22/2018] [Accepted: 01/02/2019] [Indexed: 06/12/2023]
Abstract
In this study, the incorporation of U(VI) into CaCO3 under different aging times and U(VI) concentrations was studied by combining batch experiments, X-ray diffraction (XRD), attenuated total reflection Fourier transformed infrared spectroscopy (ATR-FTIR), and extended X-ray absorption fine structure (EXAFS) approaches. Batch sorption experiments showed that the sorption of U(VI) on calcite was strong pH-dependence, and high pH was beneficial for U(VI) sorption possibly due to the electrostatic attraction between positively charged calcite and negatively charged uranyl tri-carbonate species. XRD patterns showed that the [104] facet of calcite shifted toward low angle at pH ∼10.0, which indicated that the uranyl tri-carbonate species of U(VI) possibly diffused into calcite lattice by replacing Ca atoms, and then induced the expansion of calcite crystal cell. The incorporation of U(VI) into CaCO3 showed that the uptake of U(VI) gradually decreased within the first 200 h, and then significantly increased with the increasing aging time. U(VI) incorporation into CaCO3 might experience vaterite, transition from vaterite to calcite, and calcite stages, which were confirmed by XRD, ATR-FTIR, and X-ray absorption near-edge structure (XANES) spectroscopy. As the U(VI) concentration increased, the transition time from vaterite to calcite correspondingly increased, indicating that U(VI) incorporation into CaCO3 can stabilize vaterite phase. EXAFS analyses suggested that the local structure of uranyl moiety was changing during the incorporation process, and the species of U(VI) incorporation into vaterite was similar to uranyl carbonates, however indeed different from the species of uranyl tri-carbonate presented in calcite.
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Affiliation(s)
- Zhiwei Niu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Xiaoyan Wei
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Shirong Qiang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, and Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Hanyu Wu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Duoqiang Pan
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Wangsuo Wu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Qiaohui Fan
- Key Laboratory of Petroleum Resources, Gansu Province, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
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19
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Synthesis of amidoxime-decorated 3D cubic mesoporous silica via self-assembly co-condensation as a superior uranium(VI) adsorbent. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Li M, Liu H, Chen T, Dong C, Sun Y. Synthesis of magnetic biochar composites for enhanced uranium(VI) adsorption. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:1020-1028. [PMID: 30266047 DOI: 10.1016/j.scitotenv.2018.09.259] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 08/30/2018] [Accepted: 09/20/2018] [Indexed: 05/12/2023]
Abstract
Magnetic biochar composites were successfully fabricated by pyrolysis of siderite and rice husk under N2 condition. The results of a variety of characterization implied magnetic biochar displayed porous structures with larger specific surface area. The batch adsorption experiments showed high adsorption properties of magnetic biochar composites toward U(VI) (52.63 mg/g at pH 4.0), whereas U(VI) adsorption was significantly influenced by Na2CO3 and HA. U(VI) adsorbed onto magnetic biochar was reduced to U(IV) by Fe3O4 according to XPS and XANES analyses. In addition, no significant effect of ionic strength of NaCl and EXAFS results, illustrated the inner-sphere surface complexation of U(VI) on magnetic biochar. Owing to the simple synthesis procedure, low cost, high adsorption efficiency, easy separation and environmental friendly, magnetic biochar can be considered as a potential adsorbent for the purification of U(VI)-bearing wastewater in environmental remediation.
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Affiliation(s)
- Mengxue Li
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China
| | - Haibo Liu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China; Institute of Atmospheric Environment & Pollution Control Engineering, Hefei University of Technology, Hefei 230009, PR China.
| | - Tianhu Chen
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China
| | - Chen Dong
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China
| | - Yubing Sun
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China.
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21
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Tailored synthesis of SBA-15 rods using different types of acids and its application in adsorption of uranium. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.08.039] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Xiao J, Jing Y, Wang X, Yao Y, Jia Y. Preconcentration of Uranium(VI) from Aqueous Solution by Amidoxime‐Functionalized Microspheres Silica Material: Kinetics, Isotherm and Mechanism Study. ChemistrySelect 2018. [DOI: 10.1002/slct.201802472] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jiang Xiao
- Research Institute of Subtropical ForestryChinese Academy of Forestry, Hangzhou Zhejiang 311400 China
- Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake ResourcesQinghai Institute of Salt Lakes, Chinese Academy of Sciences Xining, 810008 China
- Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources Xining, 810008 China
- University of Chinese Academy of Sciences Beijing, 100049 China
| | - Yan Jing
- Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake ResourcesQinghai Institute of Salt Lakes, Chinese Academy of Sciences Xining, 810008 China
- Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources Xining, 810008 China
| | - Xingquan Wang
- Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake ResourcesQinghai Institute of Salt Lakes, Chinese Academy of Sciences Xining, 810008 China
- Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources Xining, 810008 China
- University of Chinese Academy of Sciences Beijing, 100049 China
| | - Ying Yao
- Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake ResourcesQinghai Institute of Salt Lakes, Chinese Academy of Sciences Xining, 810008 China
- Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources Xining, 810008 China
| | - Yongzhong Jia
- Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake ResourcesQinghai Institute of Salt Lakes, Chinese Academy of Sciences Xining, 810008 China
- Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources Xining, 810008 China
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23
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Li P, Wang J, Wang X, He B, Pan D, Liang J, Wang F, Fan Q. Arsenazo-functionalized magnetic carbon composite for uranium(VI) removal from aqueous solution. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.073] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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24
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Abstract
Abstract
Diatomite was modified with TiO2. The synthesized materials were characterized and used for removal of U(VI) from aqueous solutions. The influences of pH, contact time and temperature on U(VI) adsorption onto TiO2@diatomite were studied by batch technique, and X-ray photoelectron spectroscopy (XPS) was employed to analyze the experimental data. We compared the adsorption of U(VI) onto natural diatomite, TiO2 and TiO2@diatomite made by sol-gel method. The dynamic process showed that the adsorption of U(VI) onto TiO2@diatomite matched the pseudo-second-order kinetics model, and the adsorption of U(VI) was significantly dependent on pH values. Through simulating the adsorption isotherms by Langmuir, Freundlich and Dubini–Radushkevich (D–R) models, respectively, it could be seen that the adsorption patterns of U(VI) onto TiO2@diatomite were mainly controlled by surface complexation, and the adsorption processes were endothermic and spontaneous. The modification of diatomite by TiO2 shows a novel material for removing U(VI) from water environment for industrialized application.
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Affiliation(s)
- Ni Yuan
- Radiochemistry Laboratory , Lanzhou University , Lanzhou 730000 , China
| | - Peng Liu
- Radiochemistry Laboratory , Lanzhou University , Lanzhou 730000 , China
| | - Wangsuo Wu
- Radiochemistry Laboratory , Lanzhou University , Lanzhou 730000 , China
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25
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Xie Y, Shao D, Lu X, Hayat T, Alharbi NS, Chen C, Song G, Chen D, Sun Y. Spectroscopic Investigation of Enhanced Adsorption of U(VI) and Eu(III) on Magnetic Attapulgite in Binary System. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b01803] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yi Xie
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P. O. Box 1126, Hefei 230031, P. R. China
| | - Dadong Shao
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P. O. Box 1126, Hefei 230031, P. R. China
| | - Xirui Lu
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science Technology, Mianyang 621010, China
| | | | | | - Changlun Chen
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P. O. Box 1126, Hefei 230031, P. R. China
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China
| | - Yubing Sun
- School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, P. R. China
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26
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Liao Q, Li L, Yuan Y, Cheng B, Lu W, Hou S. Preparation of 4-sulfonylcalix[6]arene modified Fe3O4 as adsorbent for adsorption of U(VI) from aqueous solution. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5650-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Hu S, Lin X, Zhang Y, Huang R, Qu Y, Luo X, Zhou J. Preparation and application of alginate-Ca/attapulgite clay core/shell particle for the removal of uranium from aqueous solution. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5427-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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28
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Magnetic Activated-ATP@Fe 3O 4 Nanocomposite as an Efficient Fenton-Like Heterogeneous Catalyst for Degradation of Ethidium Bromide. Sci Rep 2017; 7:6070. [PMID: 28729718 PMCID: PMC5519544 DOI: 10.1038/s41598-017-06398-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 06/09/2017] [Indexed: 11/22/2022] Open
Abstract
Magnetic attapulgite-Fe3O4 nanocomposites (ATP-Fe3O4) were prepared by coprecipitation of Fe3O4 on ATP. The composites were characterized by scanning electron microscopey, X-ray diffractometry, Brunauer-Emmett-Teller analysis, X-ray photoelectron spectroscopy, energy dispersive spectrometer and transmission electron microscopy. Surface characterization showed that Fe3O4 particles with an average size of approximately 15 nm were successfully embedded in matrix of ATP. The capacity of the Fe3O4-activated ATP (A-ATP@Fe3O4) composites for catalytic degradation of ethidium bromide (EtBr, 80 mg/L) at different pH values, hydrogen peroxide (H2O2) concentrations, temperatures, and catalyst dosages was investigated. EtBr degradation kinetics studies indicated that the pseudo-first-order kinetic constant was 2.445 min−1 at T = 323 K and pH 2.0 with 30 mM H2O2, and 1.5 g/L of A-ATP@Fe3O4. Moreover, a regeneration study suggested that A-ATP@Fe3O4 maintained over 80% of its maximal EtBr degradation ability after five successive cycles. The effects of the iron concentrations and free radical scavengers on EtBr degradation were studied to reveal possible catalytic mechanisms of the A-ATP@Fe3O4 nanocomposites. Electron Paramagnetic Resonance revealed both hydroxyl (∙OH) and superoxide anion (∙O2−) radicals were involved in EtBr degradation. Radical scavenging experiment suggested EtBr degradation was mainly ascribed to ∙OH radicals, which was generated by reaction between Fe2+ and H2O2 on the surface of A-ATP@Fe3O4.
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29
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Ammonium-pillared montmorillonite-CoFe 2 O 4 composite caged in calcium alginate beads for the removal of Cs + from wastewater. Carbohydr Polym 2017; 167:306-316. [DOI: 10.1016/j.carbpol.2017.03.059] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Revised: 03/17/2017] [Accepted: 03/17/2017] [Indexed: 02/01/2023]
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30
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Peng L, Ni Y, Wei X, Hanyu W, Duoqiang P, Wangsuo W. Removal of U(VI) from aqueous solution using TiO2 modified β-zeolite. RADIOCHIM ACTA 2017. [DOI: 10.1515/ract-2017-2765] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
β-Zeolite was synthesized and modified with TiO2. The synthesized materials were characterized and used for removal of U(VI) from aqueous solutions. The influences of pH, contact time and temperature on U(VI) adsorption onto modified β-zeolite by TiO2 were studied by batch technique, and XPS was employed to analysed the experimental data. The dynamic process showed that the adsorption of U(VI) onto TiO2/β-zeolite matched the pseudo-second-order kinetics model, and the adsorption of U(VI) were significantly dependent on pH values. Through simulating the adsorption isotherms by Langmuir, Freundlich and Dubini–Radushkevich (D–R) models, it could be seen, respectively that the adsorption patterns of U(VI) onto TiO2/β-zeolite were mainly controlled by surface complexation, and the adsorption processes were endothermic and spontaneous. The modification of β-zeolite by TiO2 it shows a novel material for the removing of U(VI) from water environment for industrialized application.
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Affiliation(s)
- Liu Peng
- Radiochemistry and Nuclear Environment Laboratory , Lanzhou University , Lanzhou 730000 , China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education , Lanzhou 730000 , China
| | - Yuan Ni
- Radiochemistry and Nuclear Environment Laboratory , Lanzhou University , Lanzhou 730000 , China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education , Lanzhou 730000 , China
| | - Xiong Wei
- Radiochemistry and Nuclear Environment Laboratory , Lanzhou University , Lanzhou 730000 , China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education , Lanzhou 730000 , China
| | - Wu Hanyu
- Radiochemistry and Nuclear Environment Laboratory , Lanzhou University , Lanzhou 730000 , China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education , Lanzhou 730000 , China
| | - Pan Duoqiang
- Radiochemistry and Nuclear Environment Laboratory , Lanzhou University , Lanzhou 730000 , China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education , Lanzhou 730000 , China
| | - Wu Wangsuo
- Radiochemistry and Nuclear Environment Laboratory , Lanzhou University , Lanzhou 730000 , China
- Key Laboratory of Special Function Materials and Structure Design , Ministry of Education , Lanzhou 730000 , China
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31
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Zheng X, Dou J, Yuan J, Qin W, Hong X, Ding A. Removal of Cs + from water and soil by ammonium-pillared montmorillonite/Fe 3O 4 composite. J Environ Sci (China) 2017; 56:12-24. [PMID: 28571846 DOI: 10.1016/j.jes.2016.08.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 08/10/2016] [Accepted: 08/16/2016] [Indexed: 06/07/2023]
Abstract
To remove cesium ions from water and soil, a novel adsorbent was synthesized by following a one-step co-precipitation method and using non-toxic raw materials. By combining ammonium-pillared montmorillonite (MMT) and magnetic nanoparticles (Fe3O4), an MMT/Fe3O4 composite was prepared and characterized. The adsorbent exhibited high selectivity of Cs+ and could be rapidly separated from the mixed solution under an external magnetic field. Above all, the adsorbent had high removal efficiency in cesium-contaminated samples (water and soil) and also showed good recycling performance, indicating that the MMT/Fe3O4 composite could be widely applied to the remediation of cesium-contaminated environments. It was observed that the pH, solid/liquid ratio and initial concentration affected adsorption capacity. In the presence of coexisting ions, the adsorption capacity decreased in the order of Ca2+>Mg2+>K+>Na+, which is consistent with our theoretical prediction. The adsorption behavior of this new adsorbent could be expressed by the pseudo-second-order model and Freundlich isotherm. In addition, the adsorption mechanism of Cs+ was NH4+ ion exchange and surface hydroxyl group coordination, with the former being more predominant.
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Affiliation(s)
- Xianming Zheng
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Junfeng Dou
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Jing Yuan
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Wei Qin
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Xiaoxi Hong
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Aizhong Ding
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
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32
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Yin X, Bai J, Tian W, Li S, Wang J, Wu X, Wang Y, Fan F, Huang Q, Qin Z. Uranium sorption from saline lake brine by amidoximated silica. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5283-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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33
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Liu P, Wu H, Yuan N, Liu Y, Pan D, Wu W. Removal of U(VI) from aqueous solution using synthesized β-zeolite and its ethylenediamine derivative. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.03.055] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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34
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Li W, Troyer LD, Lee SS, Wu J, Kim C, Lafferty BJ, Catalano JG, Fortner JD. Engineering Nanoscale Iron Oxides for Uranyl Sorption and Separation: Optimization of Particle Core Size and Bilayer Surface Coatings. ACS APPLIED MATERIALS & INTERFACES 2017; 9:13163-13172. [PMID: 28338312 DOI: 10.1021/acsami.7b01042] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Herein, we describe engineered superparamagnetic iron oxide nanoparticles (IONPs) as platform materials for enhanced uranyl (UO22+) sorption and separation processes under environmentally relevant conditions. Specifically, monodispersed 8-25 nm iron oxide (magnetite, Fe3O4) nanoparticles with tailored organic acid bilayered coatings have been systematically evaluated and optimized to bind, and thus remove, uranium from water. The combined nonhydrolytic synthesis and bilayer phase transfer material preparation methods yield highly uniform and surface tailorable IONPs, which allow for direct evaluation of the size-dependent and coating-dependent sorption capacities of IONPs. Optimized materials demonstrate ultrahigh sorption capacities (>50% by wt/wt) at pH 5.6 for 8 nm oleic acid (OA) bilayer and sodium monododecyl phosphate (SDP) surface-stabilized IONPs. Synchrotron-based X-ray absorption spectroscopy shows that iron oxide core particle size and stabilizing surface functional group(s) substantially affect U(VI)-removal mechanisms, specifically the ratio of uptake via adsorption versus reduction to U(IV). Taken together, tunable size and surface functionality, high colloidal stability, and favorable affinity toward uranium provide distinct synergistic advantage(s) for the application of bilayered IONPs as part of the next-generation material-based uranium recovery, remediation, and sensing technologies.
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Affiliation(s)
| | | | | | | | | | - Brandon J Lafferty
- U.S. Army Corps of Engineers, Engineer Research and Development Center , Vicksburg, Mississippi 39180, United States
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35
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Zhang S, Zhao X, Li B, Bai C, Li Y, Wang L, Wen R, Zhang M, Ma L, Li S. "Stereoscopic" 2D super-microporous phosphazene-based covalent organic framework: Design, synthesis and selective sorption towards uranium at high acidic condition. JOURNAL OF HAZARDOUS MATERIALS 2016; 314:95-104. [PMID: 27107239 DOI: 10.1016/j.jhazmat.2016.04.031] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 03/19/2016] [Accepted: 04/13/2016] [Indexed: 06/05/2023]
Abstract
So far, only five primary elements (C, H, O, N and B) and two types of spatial configuration (C2-C4, C6 and Td) are reported to build the monomers for synthesis of covalent organic frameworks (COFs), which have partially limited the route selection for accessing COFs with new topological structure and novel properties. Here, we reported the design and synthesis of a new "stereoscopic" 2D super-microporous phosphazene-based covalent organic framework (MPCOF) by using hexachorocyclotriphosphazene (a P-containing monomer in a C3-like spatial configuration) and p-phenylenediamine (a linker). The as-synthesized MPCOF shows high crystallinity, relatively high heat and acid stability and distinctive super-microporous structure with narrow pore-size distributions ranging from 1.0-2.1nm. The results of batch sorption experiments with a multi-ion solution containing 12 co-existing cations show that in the pH range of 1-2.5, MPCOF exhibits excellent separation efficiency for uranium with adsorption capacity more than 71mg/g and selectivity up to record-breaking 92%, and furthermore, an unreported sorption capacity (>50mg/g) and selectivity (>60%) were obtained under strong acidic condition (1M HNO3). Studies on sorption mechanism indicate that the uranium separation by MPCOF in acidic solution is realized mainly through both intra-particle diffusion and size-sieving effect.
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Affiliation(s)
- Shuang Zhang
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Xiaosheng Zhao
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Bo Li
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Chiyao Bai
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Yang Li
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Lei Wang
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Rui Wen
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Meicheng Zhang
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Lijian Ma
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China
| | - Shoujian Li
- College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, Chengdu 610064, PR China.
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36
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Zhu Y, Chen T, Liu H, Xu B, Xie J. Kinetics and thermodynamics of Eu(III) and U(VI) adsorption onto palygorskite. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.03.034] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Adsorption of uranium from aqueous solution by mesoporous SBA-15 with various morphologies. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-4865-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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38
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Wu H, Li P, Pan D, Yin Z, Fan Q, Wu W. Interactions between Silicon Oxide Nanoparticles (SONPs) and U(VI) Contaminations: Effects of pH, Temperature and Natural Organic Matters. PLoS One 2016; 11:e0149632. [PMID: 26930197 PMCID: PMC4773229 DOI: 10.1371/journal.pone.0149632] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 02/02/2016] [Indexed: 11/23/2022] Open
Abstract
The interactions between contaminations of U(VI) and silicon oxide nanoparticles (SONPs), both of which have been widely used in modern industry and induced serious environmental challenge due to their high mobility, bioavailability, and toxicity, were studied under different environmental conditions such as pH, temperature, and natural organic matters (NOMs) by using both batch and spectroscopic approaches. The results showed that the accumulation process, i.e., sorption, of U(VI) on SONPs was strongly dependent on pH and ionic strength, demonstrating that possible outer- and/or inner-sphere complexes were controlling the sorption process of U(VI) on SONPs in the observed pH range. Humic acid (HA), one dominated component of NOMs, bounded SONPs can enhance U(VI) sorption below pH~4.5, whereas restrain at high pH range. The reversible sorption of U(VI) on SONPs possibly indicated that the outer-sphere complexes were prevalent at pH 5. However, an irreversible interaction of U(VI) was observed in the presence of HA (Fig 1). It was mainly due to the ternary SONPs-HA-U(VI) complexes (Type A Complexes). After SONPs adsorbed U(VI), the particle size in suspension was apparently increased from ~240 nm to ~350 nm. These results showed that toxicity of both SONPs and U(VI) will decrease to some extent after the interaction in the environment. These findings are key for providing useful information on the possible mutual interactions among different contaminants in the environment.
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Affiliation(s)
- Hanyu Wu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu, 730000, China
| | - Ping Li
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan, 621000, China
| | - Duoqiang Pan
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu, 730000, China
| | - Zhuoxin Yin
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu, 730000, China
| | - Qiaohui Fan
- Key Laboratory of Petroleum Resources, Gansu Province / CAS Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou, Gansu, 730000, China
- * E-mail: (QF); (WW)
| | - Wangsuo Wu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu, 730000, China
- * E-mail: (QF); (WW)
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39
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Rahman ML, Sarkar SM, Yusoff MM, Abdullah MH. Efficient removal of transition metal ions using poly(amidoxime) ligand from polymer grafted kenaf cellulose. RSC Adv 2016. [DOI: 10.1039/c5ra18502e] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A broad peak of the reflectance spectra at 700 nm was created when Cu(ii) ions (6 to 18 ppm) is adsorbed by ligand whereas blank polymeric ligand does not. Colour optimization of Cu(ii)-complex and HR-TEM micrograph are shown in figure inset.
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Affiliation(s)
- Md Lutfor Rahman
- Faculty of Industrial Sciences and Technology
- University Malaysia Pahang
- Kuantan
- Malaysia
| | - Shaheen M. Sarkar
- Faculty of Industrial Sciences and Technology
- University Malaysia Pahang
- Kuantan
- Malaysia
| | - Mashitah Mohd Yusoff
- Faculty of Industrial Sciences and Technology
- University Malaysia Pahang
- Kuantan
- Malaysia
| | - Mohd Harun Abdullah
- Faculty of Science and Natural Resources
- Universiti Malaysia Sabah
- 88400 Kota Kinabalu
- Malaysia
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40
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Attapulgite Nanofiber-Cellulose Nanocomposite with Core-Shell Structure for Dye Adsorption. INT J POLYM SCI 2016. [DOI: 10.1155/2016/2081734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Nanocomposite particle used for adsorption has attracted continuous attention because of large specific surface area and adjustable properties from nanocomponent. Herein nanocomposite particle with cellulose core and attapulgite nanofibers shell was prepared. The size of cellulose core was about 2 mm and the thickness of nanofibers shell is about 300 μm. Adsorption capacity of nanocomposite particle to methylene blue can reach up to 11.07 mg L−1and the best adsorption effect occurs at pH = 8; pseudo-first-order equation and the Langmuir equation best describe the adsorption kinetic and isotherm, respectively; repeated adsorption-desorption experimental results show that 94.64% of the original adsorption capacity can be retained after being reused three times.
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41
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Investigation of interaction between U(VI) and carbonaceous nanofibers by batch experiments and modeling study. J Colloid Interface Sci 2015; 460:237-46. [DOI: 10.1016/j.jcis.2015.08.073] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 08/30/2015] [Indexed: 11/20/2022]
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42
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Improving the adsorption ability of graphene sheets to uranium through chemical oxidation, electrolysis and ball-milling. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4598-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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43
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Wang C, Yang X, Li C, Liu C. The sorption interactions of humic acid onto Beishan granite. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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44
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Zong P, Wu X, Gou J, Lei X, Liu D, Deng H. Immobilization and recovery of uranium(VI) using Na-bentonite from aqueous medium: equilibrium, kinetics and thermodynamics studies. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.05.052] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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45
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Gao JK, Hou LA, Zhang GH, Gu P. Facile functionalized of SBA-15 via a biomimetic coating and its application in efficient removal of uranium ions from aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2015; 286:325-333. [PMID: 25590826 DOI: 10.1016/j.jhazmat.2014.12.061] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 12/22/2014] [Accepted: 12/30/2014] [Indexed: 06/04/2023]
Abstract
A novel dopamine-functionalized mesoporous silica (DMS), synthesized by grafting dopamine onto a mesoporous molecular sieve (SBA-15), was developed as a sorbent to extract U(VI) from aqueous solution. The method used to modify SBA-15 was simple, facile and cost-effective. The DMS was characterized by SEM, TEM, XRD and BET, showing that the material had an ordered mesoporous structure and a large surface area. The effect of contact time, pH, ionic strength, temperature, and solid-liquid ratio on the sorption process was investigated. It was demonstrated that the adsorption of U(VI) by DMS was fast and that it can be described by the pseudo-second order-equation where the equilibrium time was 20 min. Additionally, the adsorption isotherm data were fitted well by the Langmuir model with the maximum adsorption capacity of DMS of 196 mg/g at pH 6.0. Furthermore, the influence of the K(+) and Na(+) concentrations and solid-to-liquid ratio on the sorption was very weak, and the values of the thermodynamic parameters revealed that the sorption process was exothermic and spontaneous. All the results suggested that the DMS could be used as an excellent adsorbent to remove U(VI) from aqueous solution.
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Affiliation(s)
- Jun-Kai Gao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Li-An Hou
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Guang-Hui Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Ping Gu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
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46
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Yu S, Mei H, Chen X, Tan X, Ahmad B, Alsaedi A, Hayat T, Wang X. Impact of environmental conditions on the sorption behavior of radionuclide 90 Sr(II) on Na-montmorillonite. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2014.12.041] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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Du Y, Yin Z, Wu H, Li P, Qi W, Wu W. Sorption of U(VI) on magnetic illite: effects of pH, ions, humic substances and temperature. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-014-3893-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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48
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Zhao Y, Wang X, Li J, Wang X. Amidoxime functionalization of mesoporous silica and its high removal of U(vi). Polym Chem 2015. [DOI: 10.1039/c5py00540j] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Amidoxime-functionalized mesoporous silica has been prepared and applied to eliminate U(vi) from aqueous solutions.
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Affiliation(s)
- Yingguo Zhao
- School of Environment and Chemical Engineering
- North China Electric Power University
- Beijing 102206
- P.R. China
- Anhui Collaborative Innovation Center for Petrochemical New Materials
| | - Xiangxue Wang
- School of Environment and Chemical Engineering
- North China Electric Power University
- Beijing 102206
- P.R. China
| | - Jiaxing Li
- School of Environment and Chemical Engineering
- North China Electric Power University
- Beijing 102206
- P.R. China
- School for Radiological and interdisciplinary Sciences (RAD-X)
| | - Xiangke Wang
- School of Environment and Chemical Engineering
- North China Electric Power University
- Beijing 102206
- P.R. China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
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49
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Li W, Liu D, Wu J, Kim C, Fortner JD. Aqueous aggregation and surface deposition processes of engineered superparamagnetic iron oxide nanoparticles for environmental applications. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:11892-11900. [PMID: 25222070 DOI: 10.1021/es502174p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Engineered, superparamagnetic, iron oxide nanoparticles (IONPs) have significant potential as platform materials for environmental sensing, imaging and remediation due to their unique size, physicochemical and magnetic properties. To this end, controlling the size and surface chemistry of the materials is crucial for such applications in the aqueous phase, and in particular, for porous matrixes with particle-surface interaction considerations. In this study, superparamagnetic, highly monodispersed 8 nm IONPs were synthesized and transferred into water as stable suspensions (remaining monodispersed) by way of an interfacial oleic acid bilayer surface. Once stabilized and characterized, particle-particle and model surface interactions (deposition and release) were quantitatively investigated and described systematically as a function of ionic strength (IS) and type with time-resolved dynamic light scattering (DLS), zeta potential, and real-time quartz crystal microbalance with dissipation monitoring (QCM-D) measurements. The critical coagulation concentration (CCC) for oleic acid bilayer coated iron oxide nanoparticles (OA-IONPs) were determined to be 710 mM for NaCl (matching DLVO predictions) and 10.6 mM for CaCl2, respectively. For all conditions tested, surface deposition kinetics showed stronger, more favorable interactions between OA-IONPs and polystyrene surfaces compared to silica, which is hypothesized to be due to increased particle-surface hydrophobic interactions (when compared to silica surfaces).
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Affiliation(s)
- Wenlu Li
- Department of Energy, Environmental, and Chemical Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
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50
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Zong P, Gou J. Rapid and economical synthesis of magnetic multiwalled carbon nanotube/iron oxide composite and its application in preconcentration of U(VI). J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.02.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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