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Kosov AV, Grishenkova OV, Semerikova OL, Vakarin SV, Zaikov YP. Mechanism and Kinetics of the Phase Formation and Dissolution of Na xWO 3 on a Pt Electrode in a Na 2WO 4-WO 3 Melt. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7207. [PMID: 38005136 PMCID: PMC10672828 DOI: 10.3390/ma16227207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/11/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023]
Abstract
A comprehensive study concerning the phase formation mechanism and growth/dissolution kinetics of sodium tungsten bronze crystals during the electrolysis of a 0.8Na2WO4-0.2WO3 melt was carried out. The regularities of deposit formation on a Pt(111) working electrode were investigated experimentally using cyclic voltammetry, chronoamperometry, scanning electron microscopy, and X-ray diffraction analysis. Models have been developed to calculate the current response during the formation, growth and dissolution of a two-phase deposit consisting of NaxWO3 and metallic tungsten or two oxide tungsten bronzes with different sodium content. These models consider mass transfer to the electrode and nuclei; chemical and electrochemical reactions with the participation of polytungstate ions, Na+, Na0, and O2-; as well as the ohmic drop effect. The approach was proposed to describe the dissolution of an NaxWO3 crystal with a nonuniform sodium distribution. The fitting of cyclic voltammograms was performed using the Levenberg-Marquardt algorithm. The NaxWO3 formation/growth/dissolution mechanism was determined. Concentration profiles and diffusion coefficients of [WnO3n]-, reaction rate constants, number density of nuclei, and time dependencies of crystal size were calculated. The proposed approaches and models can be used in other systems for the cyclic voltammogram analysis and study of the mechanism and kinetics of electrode processes complicated by phase formation; parallel and sequential electrochemical and chemical reactions; as well as the formation of a deposit characterized by a nonuniform phase and/or chemical composition.
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Affiliation(s)
- Alexander V. Kosov
- Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg 620990, Russia; (O.L.S.); (S.V.V.); (Y.P.Z.)
| | - Olga V. Grishenkova
- Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg 620990, Russia; (O.L.S.); (S.V.V.); (Y.P.Z.)
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2
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Sun HY, Hu B, Lv TT, Guo YL, Yao YX, Yang L, Feng ML, Huang XY. Efficient Co-Adsorption and Highly Selective Separation of Cs + and Sr 2+ with a K + -Activated Niobium Germanate by the pH Control. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2208212. [PMID: 36916691 DOI: 10.1002/smll.202208212] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/20/2023] [Indexed: 06/15/2023]
Abstract
137 Cs and 90 Sr are hazardous to ecological environment and human health due to their strong radioactivity, long half-life, and high mobility. However, effective adsorption and separation of Cs+ and Sr2+ from acidic radioactive wastewater is challenging due to stability issues of material and the strong competition of protons. Herein, a K+ -activated niobium germanate (K-NGH-1) presents efficient Cs+ /Sr2+ coadsorption and highly selective Cs+ /Sr2+ separation, respectively, under different acidity conditions. In neutral solution, K-NGH-1 exhibits ultrafast adsorption kinetics and high adsorption capacity for both Cs+ and Sr2+ (qm Cs = 182.91 mg g-1 ; qm Sr = 41.62 mg g-1 ). In 1 M HNO3 solution, K-NGH-1 still possesses qm Cs of 91.40 mg g-1 for Cs+ but almost no adsorption for Sr2+ . Moreover, K-NGH-1 can effectively separate Cs+ from 1 M HNO3 solutions with excess competing Sr2+ and Mn + (Mn + = Na+ , Ca2+ , Mg2+ ) ions. Thus, efficient separation of Cs+ and Sr2+ is realized under acidic conditions. Besides, K-NGH-1 shows excellent acid and radiation resistance and recyclability. All the merits above endow K-NGH-1 with the first example of niobium germanates for radionuclides remediation. This work highlights the facile pH control approach towards bifunctional ion exchangers for efficient Cs+ /Sr2+ coadsorption and selective separation.
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Affiliation(s)
- Hai-Yan Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bing Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Tian-Tian Lv
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Yan-Ling Guo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Yue-Xin Yao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Lu Yang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Mei-Ling Feng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Xiao-Ying Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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Zhang X, Liu Y. Ultrafast removal of radioactive strontium ions from contaminated water by nanostructured layered sodium vanadosilicate with high adsorption capacity and selectivity. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122907. [PMID: 32768821 DOI: 10.1016/j.jhazmat.2020.122907] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/26/2020] [Accepted: 04/26/2020] [Indexed: 06/11/2023]
Abstract
Layered sodium vanadosilicates was synthesized for removing soluble strontium ion (Sr2+) from simulated radioactive wastewater. SEM, EDS and TEM images indicated that layered sodium vanadosilicates had a nanostructure with flake-like shape providing an extremely large surface area. XRD, FTIR and XPS analyses further revealed a framework structure of adsorbent consisting of corner-sharing SiO4 tetrahedra and VO6 octahedra, with sodium ion being the major cation in the synthesized nanostructured layered sodium vanadosilicate. This study for the first time showed ultrafast adsorption of Sr2+ by nanostructured layered sodium vanadosilicates in a time frame of seconds with a high adsorption capacity of 174.3 mg/g estimated from Langmuir isotherm. It was found that about 99.0% of Sr2+ at an initial concentration of 5.00 mg/L and adsorbent dosage of 0.5 g/L could be removed within several seconds. The kinetic analysis further revealed that pseudo-second-order instead of pseudo-first-order kinetics could satisfactorily describe the observed ultrafast removal of Sr2+. In particular, the nanostructure layered sodium vanadosilicates exhibited an excellent affinity to Sr2+ over a wide pH range of 3-11. It was also demonstrated that the working mechanisms of nanostructured layered sodium vanadosilicates for Sr2+ removal mainly included surface electrostatic interaction and ion-exchange with sodium ion. Furthermore, nanostructure layered sodium vanadosilicates had significant advantages for Sr2+ removal compared with other adsorbents. Consequently, it is reasonable to expect that nanostructured layered sodium vanadosilicates synthesized in this study could be considered as a promising adsorbent for ultrafast and high-efficiency removal of radioactive Sr2+ from radioactive wastewaters.
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Affiliation(s)
- Xiaoyuan Zhang
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, 637141, Singapore
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
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Rees GJ, Day SP, Barnsley KE, Iuga D, Yates JR, Wallis JD, Hanna JV. Measuring multiple 17O–13C J-couplings in naphthalaldehydic acid: a combined solid state NMR and density functional theory approach. Phys Chem Chem Phys 2020; 22:3400-3413. [DOI: 10.1039/c9cp03977e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A combined multinuclear solid-state NMR and a density functional theory computational approach, with SIMPSON simulations, is evaluated to determine the four heteronuclear 1J(13C,17O) couplings in naphthalaldehydic acid.
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Affiliation(s)
| | | | | | - Dinu Iuga
- Department of Physics
- University of Warwick
- Coventry
- UK
| | | | - John D. Wallis
- School of Science and Technology
- Nottingham Trent University
- Nottingham
- UK
| | - John V. Hanna
- Department of Physics
- University of Warwick
- Coventry
- UK
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5
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Mou W, Du S, Yu Q, Li X, Wei H, Yang Y. Efficient Capture of Radioactive Strontium from Water Using Magnetic WO 3Assembled on Grapheme Oxide Nanocomposite. ChemistrySelect 2018. [DOI: 10.1002/slct.201800891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wanjun Mou
- China Academy of Engineering Physics; Institute of Nuclear Physics and Chemistry; 64# Mianshan Road, Mianyang Sichuan Province, P. R. China,621900
| | - Shenzhen Du
- China Academy of Engineering Physics; Institute of Nuclear Physics and Chemistry; 64# Mianshan Road, Mianyang Sichuan Province, P. R. China,621900
| | - Qianhong Yu
- China Academy of Engineering Physics; Institute of Nuclear Physics and Chemistry; 64# Mianshan Road, Mianyang Sichuan Province, P. R. China,621900
| | - Xingliang Li
- China Academy of Engineering Physics; Institute of Nuclear Physics and Chemistry; 64# Mianshan Road, Mianyang Sichuan Province, P. R. China,621900
| | - Hongyuan Wei
- China Academy of Engineering Physics; Institute of Nuclear Physics and Chemistry; 64# Mianshan Road, Mianyang Sichuan Province, P. R. China,621900
| | - Yuchuan Yang
- China Academy of Engineering Physics; Institute of Nuclear Physics and Chemistry; 64# Mianshan Road, Mianyang Sichuan Province, P. R. China,621900
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6
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Alby D, Charnay C, Heran M, Prelot B, Zajac J. Recent developments in nanostructured inorganic materials for sorption of cesium and strontium: Synthesis and shaping, sorption capacity, mechanisms, and selectivity-A review. JOURNAL OF HAZARDOUS MATERIALS 2018; 344:511-530. [PMID: 29100131 DOI: 10.1016/j.jhazmat.2017.10.047] [Citation(s) in RCA: 122] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/19/2017] [Accepted: 10/22/2017] [Indexed: 06/07/2023]
Abstract
Liquid wastes containing non-ferrous heavy metal ions and some radionuclides, 137Cs and 90Sr in particular, represent one of the most dangerous sources of environmental contamination. The remediation of wastewater containing such pollutants continue to be among the biggest challenges of Sustainable Development and Environmental Safety. Sorption-based technologies have proven their efficiency also in reducing the radionuclide content in aqueous streams to low-level residual activity, with the concomitant decrease in the amount of ultimate solid waste generated. Although sorption of cesium and strontium by resins, clays, and zeolites has been investigated intensively and even used in real applications, there is still considerable scope for improvement in terms of retention capacity and selectivity. Recent progress in design and preparation of nanostructured inorganic materials has attracted growing interest based on the potential for improving the retention performance when coupling such functionalities as ion exchange capacity, structural flexibility that may result in steric retention effects, as well as the propensity to interact specifically with the target metal cations. Titanate, vanadate, and tungsten based materials, manganese oxides, hexacyanoferrates, metal sulfides, ammonium molybdophosphates, or hydroxyapatite, characterized by various structures and morphologies, are reviewed with the emphasis being put on synthesis and shaping of such materials, their structure in relationship with the capacity and selectivity of trapping cesium and strontium from either single or multi-component aqueous solutions, as well as the possible retention mechanism. The potential candidates for remediation uses are selected with regard to their sorption capacity and distribution coefficient towards target cations, and also the pH window for an optimum cation capture.
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Affiliation(s)
- Delhia Alby
- Institut Charles Gerhardt, UMR-5253 CNRS-UM-ENSCM, Université de Montpellier, Place E. Bataillon, F-34095 Montpellier cedex 5, France
| | - Clarence Charnay
- Institut Charles Gerhardt, UMR-5253 CNRS-UM-ENSCM, Université de Montpellier, Place E. Bataillon, F-34095 Montpellier cedex 5, France
| | - Marc Heran
- Institut Européen des Membranes, UMR5635 CNRS-UM-ENSCM, Université de Montpellier, Place E. Bataillon, F-34095 Montpellier cedex 5, France
| | - Bénédicte Prelot
- Institut Charles Gerhardt, UMR-5253 CNRS-UM-ENSCM, Université de Montpellier, Place E. Bataillon, F-34095 Montpellier cedex 5, France
| | - Jerzy Zajac
- Institut Charles Gerhardt, UMR-5253 CNRS-UM-ENSCM, Université de Montpellier, Place E. Bataillon, F-34095 Montpellier cedex 5, France.
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7
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Hooper TJN, Partridge TA, Rees GJ, Keeble DS, Powell NA, Smith ME, Mikheenko IP, Macaskie LE, Bishop PT, Hanna JV. Direct solid state NMR observation of the 105Pd nucleus in inorganic compounds and palladium metal systems. Phys Chem Chem Phys 2018; 20:26734-26743. [DOI: 10.1039/c8cp02594k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although 105Pd is a very challenging nucleus for solid state NMR, these initial observations demonstrate its potential for characterising catalytically relevant Pd metal systems.
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Affiliation(s)
| | | | | | - Dean S. Keeble
- Diamond Light Source
- Harwell Science and Innovation Campus
- Didcot
- UK
| | | | | | | | | | | | - John V. Hanna
- Department of Physics
- University of Warwick
- Coventry
- UK
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8
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Deng H, Li Y, Wu L, Ma X. The novel composite mechanism of ammonium molybdophosphate loaded on silica matrix and its ion exchange breakthrough curves for cesium. JOURNAL OF HAZARDOUS MATERIALS 2017; 324:348-356. [PMID: 27823822 DOI: 10.1016/j.jhazmat.2016.10.068] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/12/2016] [Accepted: 10/28/2016] [Indexed: 06/06/2023]
Abstract
Long-lived 137Cs (over 30 years), a byproduct of the spent fuel fission processes, comprises the majority of high-level and prolific heat-generating waste in downstream processing. This study reports a novel sequential annealing mechanism with cross-linked network of polyvinyl alcohol, fabricating the composite of ammonium molybdophosphate loaded on silica matrix (SM-AMP20, 20wt% AMP) as an excellent granular ion exchanger for removal Cs+. When the matrix is remarkably sequential annealed, well-dispersed SM-AMP20 particles are formed by firmly anchoring themselves on controlling the porous characteristics and stable structure. The material crystallizes in the complex cubic space group Pn-3m with cell parameters of crystalline AMP formation. The breakthrough curve of Cs+ by SM-AMP20 follows the Thomas model with a high removal rate of 88.23% (∼10mg/L of Cs+) and breakthrough time as high as 26h (flow rate Q≈2.5mL/min and bed height Z≈11cm) at neutral pH. We also report on sorbents that could efficiently remove Cs+ ions from complex solutions containing different competitive cations (Na+, Al3+, Fe3+, and Ni2+, respectively) in large excess. Furthermore, this study shows that there is a probability for SM-AMP20 to recycle cesium using an eluent of 2-3mol/L NH4NO3 solution.
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Affiliation(s)
- Hao Deng
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Yuxiang Li
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, PR China; School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, PR China; National Defense Key Discipline Laboratory for Nuclear Wastes and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, PR China.
| | - Lang Wu
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Xue Ma
- School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, PR China
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9
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Soriano MD, Chieregato A, Zamora S, Basile F, Cavani F, López Nieto JM. Promoted Hexagonal Tungsten Bronzes as Selective Catalysts in the Aerobic Transformation of Alcohols: Glycerol and Methanol. Top Catal 2015. [DOI: 10.1007/s11244-015-0440-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Liu B, Mu W, Xie X, Li X, Wei H, Tan Z, Jian Y, Luo S. Enhancing the adsorption capacity of Sr2+ and Cs+ onto hexagonal tungsten oxide by doped niobium. RSC Adv 2015. [DOI: 10.1039/c4ra13161d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The adsorption capacity of Sr2+ and Cs+ onto hexagonal tungsten oxide was enhanced by the incorporation of Nb.
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Affiliation(s)
- Bijun Liu
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Wanjun Mu
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Xiang Xie
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Xingliang Li
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Hongyuan Wei
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Zhaoyi Tan
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Yuan Jian
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Shunzhong Luo
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
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11
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Mu W, Li M, Li X, Ma Z, Zhang R, Yu Q, Lv K, Xie X, He J, Wei H, Jian Y. Guanidine sulfate-assisted synthesis of hexagonal WO3 nanoparticles with enhanced adsorption properties. Dalton Trans 2015; 44:7419-27. [DOI: 10.1039/c5dt00103j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hexagonal WO3 nanowires prepared with the assistance of C2H10N·H2SO4 possess a large specific surface area and numerous adsorption functional groups, consequently improving the Sr2+ adsorption capacity considerably.
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Affiliation(s)
- Wanjun Mu
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Mei Li
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Xingliang Li
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Zongping Ma
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Rui Zhang
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Qianhong Yu
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Kai Lv
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Xiang Xie
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Jiaheng He
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Hongyuan Wei
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
| | - Yuan Jian
- Institute of Nuclear Chemistry and Physics
- China Academy of Engineering Physics
- Mianyang
- China
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12
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Li X, Mu W, Xie X, Liu B, Tang H, Zhou G, Wei H, Jian Y, Luo S. Strontium adsorption on tantalum-doped hexagonal tungsten oxide. JOURNAL OF HAZARDOUS MATERIALS 2014; 264:386-394. [PMID: 24316810 DOI: 10.1016/j.jhazmat.2013.11.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 10/14/2013] [Accepted: 11/14/2013] [Indexed: 06/02/2023]
Abstract
Hexagonal tungsten oxide (hex-WO3) has the potential to separate (137)Cs and (90)Sr from nuclear power plant or fission (99)Mo production waste. This study aims to increase the capacity of hex-WO3 to adsorb Sr(2+). Ta-doped hex-WO3 was synthesized by the hydrothermal treatment of sodium tungstate dihydrate and tantalum chloride in concentrated HCl, in the presence of ammonium sulfate. Incorporating Ta into the WO3 framework caused the interlayer spacing to expand, and the band gap to shift to higher energy. The Sr(2+) adsorption capacity of Ta-doped hex-WO3 was significantly higher than that of hex-WO3. Sr(2+) adsorption reached equilibrium within 2h in acidic solution. Maximum Sr(2+) removal occurred at pH 4. Sr(2+) uptake by hex-WO3 was described better by the Freundlich model than by the Langmuir model. Sr(2+) adsorption on hex-WO3 was spontaneous under the studied conditions.
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Affiliation(s)
- Xingliang Li
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China; Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, PR China.
| | - Wanjun Mu
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China
| | - Xiang Xie
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China
| | - Bijun Liu
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China
| | - Hui Tang
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China
| | - Guanhong Zhou
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China
| | - Hongyuan Wei
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China
| | - Yuan Jian
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China; Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, PR China
| | - Shunzhong Luo
- Institute of Nuclear Chemistry and Physics, China Academy of Engineering Physics, Mianyang 621900, PR China.
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13
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García-González E, Soriano MD, Urones-Garrote E, López Nieto JM. On the origin of the spontaneous formation of nanocavities in hexagonal bronzes (W,V)O3. Dalton Trans 2014; 43:14644-52. [DOI: 10.1039/c4dt01465k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis route followed to prepare h-WO3 type oxides results in the production of nanostructured crystals by the spontaneous formation of self-assembled and regular nano-cavities on their surface.
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Affiliation(s)
- E. García-González
- Departamento Química Inorgánica
- Facultad de Ciencias Químicas
- Universidad Complutense
- 28040 Madrid, Spain
| | - M. D. Soriano
- Instituto de Tecnología Química
- UPV-CSIC
- Campus Universidad Politécnica de Valencia
- 46022 Valencia, Spain
| | - E. Urones-Garrote
- Centro Nacional de Microscopia Electrónica
- Universidad Complutense
- Madrid, Spain
| | - J. M. López Nieto
- Instituto de Tecnología Química
- UPV-CSIC
- Campus Universidad Politécnica de Valencia
- 46022 Valencia, Spain
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14
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Glycerol oxidehydration into acrolein and acrylic acid over W–V–Nb–O bronzes with hexagonal structure. Catal Today 2012. [DOI: 10.1016/j.cattod.2012.06.024] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Li X, Liu B, Jian Y, Zhong W, Mu W, He J, Ma Z, Liu G, Luo S. Ion-Exchange Characteristics of a Layered Metal Sulfide for Removal of Sr2+from Aqueous Solutions. SEP SCI TECHNOL 2012. [DOI: 10.1080/01496395.2011.629397] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Nagai D, Imazeki T, Morinaga H, Nakabayashi H. Synthesis of a rare-metal adsorbing polymer by three-component polyaddition of diamines, carbon disulfide, and diacrylates in an aqueous/organic biphasic medium. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24414] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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