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Wang J, Xu B. Removal of radionuclide 99Tc from aqueous solution by various adsorbents: A review. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2023; 270:107267. [PMID: 37598575 DOI: 10.1016/j.jenvrad.2023.107267] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 08/05/2023] [Indexed: 08/22/2023]
Abstract
Technetium isotope 99Tc is a main radioactive waste produced in the process of nuclear reaction, which has the characteristics of long half-life and strong environmental mobility, and can be bio-accumulated in organisms, resulting in serious threat to human health and ecosystem. Adsorption method is widely used in the field of removing radionuclides from water due to the advantages of high treatment rate, simple and mature industrial application. In this review paper, the recent advances in research and application of various adsorption materials for 99Tc pollution treatment were summarized and analyzed for the first time, including inorganic adsorbents, such as activated carbon, zero-valent iron, metallic minerals, clay minerals, layered double hydroxides (LDHs), tin-based materials, and sulfur-based materials; organic adsorbents, such as porous organic polymers (POPs), covalent-organic frameworks (COFs), metal-organic frameworks (MOFs), and ion exchange resin; and biological adsorbents, such as biopolymers (chitosan, cellulose, alginate), and microbial cells. The performance characteristics and the adsorption kinetics and isotherms of various adsorption materials were discussed. This review could deepen the understanding of the adsorptive removal of 99Tc from aqueous solution, and provide a reference for the future research in this field.
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Affiliation(s)
- Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Beijing 100084, PR China.
| | - Bowen Xu
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China
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2
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Jang J, Sekimoto S, Ohtsuki T, Tatenuma K, Tsuguchi A, Uesaka M. A quantitative description of the compatibility of technetium-selective chromatographic technetium-99m separation with low specific activity molybdenum-99. J Chromatogr A 2023; 1705:464192. [PMID: 37459808 DOI: 10.1016/j.chroma.2023.464192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/29/2023] [Accepted: 07/01/2023] [Indexed: 08/09/2023]
Abstract
Technetium-99m generators employing a technetium-selective stationary phase are a chromatographic instrument developed for use with 99Mo having low specific activity (LSA); particularly, 99Mo produced by electron accelerators. This paper presents a mathematical description of technetium-selective chromatographic (TSC) 99mTc separation and analyzes its compatibility with LSA 99Mo. We developed a theoretical formula for TSC 99mTc separation by discretizing its pertechnetate selectivity, and validated it using an electron linear accelerator and activated carbon-based TSC (AC-TSC) 99mTc generators. We confirmed that the activity concentration of 99mTc obtained from a TSC 99mTc generator can be calculated directly from its input 99Mo activity regardless of the 99Mo specific activity. The formula corroborates that TSC 99mTc separation is compatible with LSA 99Mo, and has a practical application in estimating the number of TSC 99mTc generators required for 99mTc demand of interest.
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Affiliation(s)
- Jaewoong Jang
- Department of Bioengineering, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan; Isotope Science Center, University of Tokyo, 2-11-16 Yayoi, Bunkyo, Tokyo 113-0032, Japan.
| | - Shun Sekimoto
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2-1010 Asashironishi, Kumatori, Sennan, Osaka 590-0494 Japan
| | - Tsutomu Ohtsuki
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2-1010 Asashironishi, Kumatori, Sennan, Osaka 590-0494 Japan
| | | | | | - Mitsuru Uesaka
- Department of Bioengineering, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan; Nuclear Professional School, School of Engineering, University of Tokyo, 2-22 Shirakata-shirane, Tokai, Naka, Ibaraki 319-1188, Japan
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3
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Faizan A, Takeda M, Yoshitake H. Effective adsorption of perrhenate ions on the filamentous sheath‐forming bacteria,
Sphaerotilus montanus
,
Sphaerotilus natans
and
Thiothrix fructosivorans. J Appl Microbiol 2022; 133:607-618. [DOI: 10.1111/jam.15590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/19/2022] [Accepted: 04/20/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Arshad Faizan
- Graduate School of Engineering Yokohama National University, 79‐5 Tokiwadai, 240‐8501, Hodogaya‐ku Yokohama
| | - Minoru Takeda
- Graduate School of Engineering Yokohama National University, 79‐5 Tokiwadai, 240‐8501, Hodogaya‐ku Yokohama
| | - Hideaki Yoshitake
- Graduate School of Engineering Yokohama National University, 79‐5 Tokiwadai, 240‐8501, Hodogaya‐ku Yokohama
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4
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Mausolf EJ, Johnstone EV, Mayordomo N, Williams DL, Guan EYZ, Gary CK. Fusion-Based Neutron Generator Production of Tc-99m and Tc-101: A Prospective Avenue to Technetium Theranostics. Pharmaceuticals (Basel) 2021; 14:ph14090875. [PMID: 34577575 PMCID: PMC8467155 DOI: 10.3390/ph14090875] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/20/2021] [Accepted: 08/26/2021] [Indexed: 12/14/2022] Open
Abstract
Presented are the results of 99mTc and 101Tc production via neutron irradiation of natural isotopic molybdenum (Mo) with epithermal/resonance neutrons. Neutrons were produced using a deuterium-deuterium (D-D) neutron generator with an output of 2 × 1010 n/s. The separation of Tc from an irradiated source of bulk, low-specific activity (LSA) Mo on activated carbon (AC) was demonstrated. The yields of 99mTc and 101Tc, together with their potential use in medical single-photon emission computed tomography (SPECT) procedures, have been evaluated from the perspective of commercial production, with a patient dose consisting of 740 MBq (20 mCi) of 99mTc. The number of neutron generators to meet the annual 40,000,000 world-wide procedures is estimated for each imaging modality: 99mTc versus 101Tc, D-D versus deuterium-tritium (D-T) neutron generator system outputs, and whether or not natural molybdenum or enriched targets are used for production. The financial implications for neutron generator production of these isotopes is also presented. The use of 101Tc as a diagnostic, therapeutic, and/or theranostic isotope for use in medical applications is proposed and compared to known commercial nuclear diagnostic and therapeutic isotopes.
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Affiliation(s)
| | - Erik V. Johnstone
- Innovative Fuel Solutions LLC, North Las Vegas, NV 89031, USA;
- Correspondence:
| | - Natalia Mayordomo
- Helmholtz-Zentrum Dresden–Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany;
| | - David L. Williams
- Adelphi Technology, Inc., Redwood City, CA 94063, USA; (D.L.W.); (E.Y.Z.G.); (C.K.G.)
| | - Eugene Yao Z. Guan
- Adelphi Technology, Inc., Redwood City, CA 94063, USA; (D.L.W.); (E.Y.Z.G.); (C.K.G.)
| | - Charles K. Gary
- Adelphi Technology, Inc., Redwood City, CA 94063, USA; (D.L.W.); (E.Y.Z.G.); (C.K.G.)
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5
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Wang H, Lou X, Hu Q, Sun T. Adsorption of antibiotics from water by using Chinese herbal medicine residues derived biochar: Preparation and properties studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114967] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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6
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Kazakov AG, Garashchenko BL, Yakovlev RY, Vinokurov SE, Myasoedov BF. Study of Technetium Sorption Behavior on Nanodiamonds Using 99,99mTc Isotopes. RADIOCHEMISTRY 2020. [DOI: 10.1134/s1066362220060077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Chaudhury S, Mishra V, Shah D. Highly selective separation of pertechnetate from waste water. JOURNAL OF WATER PROCESS ENGINEERING 2019; 31:100896. [DOI: 10.1016/j.jwpe.2019.100896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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8
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Park JI, Cho HR, Choi KS, Park KK, Park YJ. Pertechnetate removal from aqueous solution using activated carbon modified with oxidizing and reducing agents. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-5769-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Han D, Li X, Cui Y, Yang X, Chen X, Xu L, Peng J, Li J, Zhai M. Polymeric ionic liquid gels composed of hydrophilic and hydrophobic units for high adsorption selectivity of perrhenate. RSC Adv 2018; 8:9311-9319. [PMID: 35541890 PMCID: PMC9078687 DOI: 10.1039/c8ra00838h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 02/26/2018] [Indexed: 11/21/2022] Open
Abstract
The removal of TcO4− from aqueous solutions has attracted more and more attention recently, and ReO4− has been widely used as its natural analog. In this work, polymeric ionic liquid gel adsorbents, PC2-C12vimBr, with high adsorption capacity and selectivity towards ReO4− were synthesized by radiation-induced polymerization and crosslinking. PC2-C12vimBr was composed of two monomers: a hydrophobic unit, 1-vinyl-3-dodecylimidazolium bromide for high selectivity, and a hydrophilic unit, 1-vinyl-3-ethylimidazolium bromide for improved kinetics. A gel fraction up to 90% could be achieved under 40 kGy with varied monomer ratios. The adsorption of PC2-C12vimBr gels for ReO4− was evaluated by batch adsorption. The PC2-C12vimBr gel containing 20 mol% hydrophilic unit (named PC2-C12vimBr-A) could significantly improve the adsorption kinetics, which had an equilibrium time of ca. 24 h. The adsorption capacity obtained from the Langmuir model was 559 mg g−1 (Re/gel). The selective factor against NO3− was 33.4 ± 1.9, which was more than 10 times higher than that of PC2vimBr, and it could maintain ReO4− uptake as high as 100 mg g−1 in 0.5 mol kg−1 HNO3. The ΔHΘ and ΔSΘ of the NO3−/ReO4− ion-exchange reaction of PC2-C12vimNO3-A were −16.9 kJ mol−1 and 29 J mol−1 K−1, respectively, indicating physical adsorption. The adsorption mechanism of ReO4− onto PC2-C12vimBr-A gel was ion-exchange, and it could be recovered using 5.4 mol kg−1 HNO3. Polymeric ionic liquid gels composed of hydrophilic and hydrophobic units with high adsorption selectivity towards perrhenate were synthesized.![]()
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Affiliation(s)
- Dong Han
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Xingxiao Li
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Yu Cui
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Xin Yang
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Xibang Chen
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Ling Xu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics
- School of Public Health
- Xiamen University
- Xiamen
- China
| | - Jing Peng
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Jiuqiang Li
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Maolin Zhai
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
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10
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11
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Separation of 99Tc, 90Sr, 59,63Ni, 55Fe and 94Nb from activated carbon and stainless steel waste samples. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5566-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Daňo M, Viglašová E, Galamboš M, Rajec P, Novák I. Sorption behaviour of pertechnetate on oxidized and reduced surface of activated carbon. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5532-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Removal of pertechnetate from aqueous solution using activated pyrolytic rubber char. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5442-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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15
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Zhu Y, Wu M, Gao N, Chu W, Wang S. Impacts of nitrate and electron donor on perchlorate reduction and microbial community composition in a biologically activated carbon reactor. CHEMOSPHERE 2016; 165:134-143. [PMID: 27643659 DOI: 10.1016/j.chemosphere.2016.08.078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/15/2016] [Accepted: 08/17/2016] [Indexed: 06/06/2023]
Abstract
The sensitivity of perchlorate reduction and microbial composition to varied nitrate and acetate loadings was studied in a biologically activated carbon reactor with perchlorate loading and empty bed contact time fixed at 5 mg/L and 226 min, respectively. In stage 1, the sole electron acceptor ClO4- realized complete removal with ≥21.95 mg C/L of acetate supply. As nitrate loading gradually increased to 5 mg/L (stage 2), perchlorate reduction was slightly promoted and both ClO4- and NO3- were completely removed at an acetate loading of 29.7 mg C/L. When nitrate loading continued increasing to 10-60 mg/L (stage 3), perchlorate reduction converted to be inhibited, along with nondetectable NO3- and approximately exhausted DOC in effluent. When acetate loading increased to 43.9 mg C/L in stage 4, both ClO4- and NO3- were again removed, though lags still existed in perchlorate reduction. β-Proteobacteria accounted for about 60%, 55%, 58%, 61% and 12% in samples from the base and top of the filter in stage 1 and those from the base, middle and top in stage 4, respectively. These findings implied that ratio of NO3- to ClO4- loadings and acetate loading were two key factors impacting ClO4- reduction and microbial structure along the filter.
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Affiliation(s)
- Yanping Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China
| | - Min Wu
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China.
| | - Naiyun Gao
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China
| | - Wenhai Chu
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China
| | - Shuaifeng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China
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16
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Hu H, Jiang B, Wu H, Zhang J, Chen X. Bamboo (Acidosasa edulis) shoot shell biochar: Its potential isolation and mechanism to perrhenate as a chemical surrogate for pertechnetate. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2016; 165:39-46. [PMID: 27623013 DOI: 10.1016/j.jenvrad.2016.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 08/30/2016] [Accepted: 09/03/2016] [Indexed: 06/06/2023]
Abstract
In this work, a biochar was prepared from bamboo (Acidosasa edulis) shoot shell through slow pyrolysis (under 300-700 °C). Characterization with various tools showed that the biochar surface was highly hydrophobic and also had more basic functional groups. Batch sorption experiments showed that the biochar had strong sorption ability to perrhenate (a chemical surrogate for pertechnetate) with maximum sorption capacity of 46.46 mg/g, which was significantly higher than commercial coconut shell activated carbon and some adsorbents reported previously. Desorption experiments showed that more than 94% of total perrhenate adsorbed could be recovered using 0.1 mol/L KOH as a desorption medium. Pearson correlation analysis showed that the recovery of perrhenate by the biochars was mainly through surface adsorption mechanisms involving both high hydrophobicity and high basic sites of biochar surface.
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Affiliation(s)
- Hui Hu
- School of Chemical Engineering, Fuzhou University, Fuzhou 350116, Fujian, China.
| | - Bangqiang Jiang
- School of Chemical Engineering, Fuzhou University, Fuzhou 350116, Fujian, China
| | - Huixiong Wu
- Hualu Engineering & Technology Co., LTD, Xian 710065, Shanxi, China
| | - Jubin Zhang
- School of Chemical Engineering, Fuzhou University, Fuzhou 350116, Fujian, China
| | - Xiaohui Chen
- National Engineering Research Center for Chemical Fertilizer Catalyst, School of Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350002, China
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17
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Surfactant modification and adsorption properties of clinoptilolite for the removal of pertechnetate from aqueous solutions. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-4850-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Zu J, Liu R, Zhang J, Tang F, He L. Adsorption of Re and 99Tc by means of radiation-grafted weak basic anion exchange resin. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-4819-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Williams CD, Carbone P. Selective Removal of Technetium from Water Using Graphene Oxide Membranes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:3875-3881. [PMID: 26954102 DOI: 10.1021/acs.est.5b06032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The effective removal of radioactive technetium ((99)Tc) from contaminated water is of enormous importance from an environmental and public health perspective, yet many current methodologies are highly ineffective. In this work, however, we demonstrate that graphene oxide membranes may remove (99)Tc, present in the form of pertechnetate (TcO4(-)), from water with a high degree of selectivity, suggesting they provide a cost-effective and efficient means of achieving (99)Tc decontamination. The results were obtained by quantifying and comparing the free energy changes associated with the entry of the ions into the membrane capillaries (ΔFperm), using molecular dynamics simulations. Initially, three capillary widths were investigated (0.35, 0.68, and 1.02 nm). In each case, the entry of TcO4(-) from aqueous solution into the capillary is associated with a decrease in free energy, unlike the other anions (SO4(2-), I(-), and Cl(-)) investigated. For example, in the model with a capillary width of 0.68 nm, ΔFperm(TcO4(-)) = -6.3 kJ mol(-1), compared to ΔFperm(SO4(2-)) = +22.4 kJ mol(-1). We suggest an optimum capillary width (0.48 nm) and show that a capillary with this width results in a difference between ΔFperm(TcO4(-)) and ΔFperm(SO4(2-)) of 89 kJ mol(-1). The observed preference for TcO4(-) is due to its weakly hydrating nature, reflected in its low experimental hydration free energy.
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Affiliation(s)
- Christopher D Williams
- School of Chemical Engineering and Analytical Science, The University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Paola Carbone
- School of Chemical Engineering and Analytical Science, The University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
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20
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Williams CD, Carbone P. A classical force field for tetrahedral oxyanions developed using hydration properties: The examples of pertechnetate (TcO4(-)) and sulfate (SO4(2-)). J Chem Phys 2016; 143:174502. [PMID: 26547171 DOI: 10.1063/1.4934964] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Radioactive pertechnetate, (99)TcO4(-), is one of the most problematic ionic species in the context of the clean up and storage of nuclear waste. Molecular simulations can be used to understand the behavior of TcO4(-) in dilute aqueous solutions, providing reliable potentials are available. This work outlines the development of a new potential model for TcO4(-) and competing SO4(2-), optimized using their hydration properties, such as the Gibbs hydration free energy (calculated using Bennett's acceptance ratio method). The findings show that the TcO4(-) oxyanion has a very low hydration free energy (-202 kJ mol(-1)) compared to other anions (Cl(-), I(-), SO4(2-)) leading to fast water exchange dynamics and explaining its observed high mobility in the aqueous environment. Its hydrated structure, investigated using ion-water radial distribution functions, shows that it is unique amongst the other anions in that it does not possess well-defined hydration shells. Since contaminants and ubiquitous species in the aqueous environment are often present as tetrahedral oxyanions, it is proposed that the approach could easily be extended to a whole host of other species.
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Affiliation(s)
- Christopher D Williams
- School of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Paola Carbone
- School of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, United Kingdom
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Rajec P, Rosskopfová O, Galamboš M, Frišták V, Soja G, Dafnomili A, Noli F, Đukić A, Matović L. Sorption and desorption of pertechnetate on biochar under static batch and dynamic conditions. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-4811-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Viglašová E, Daňo M, Galamboš M, Rosskopfová O, Rajec P, Novák I. Column studies for the separation of 99mTc using activated carbon. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4142-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Galamboš M, Daňo M, Viglašová E, Krivosudský L, Rosskopfová O, Novák I, Berek D, Rajec P. Effect of competing anions on pertechnetate adsorption by activated carbon. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-3953-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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