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Muhire C, Zhang D, Chang C, Zhang X, Li D, Zhiren G, Zhang Z, Zhang F, Hou J, Li J, Xu X. Highly radioiodine gas capture by 2-mercaptobenzimidazole-functionalized Bi/Mg oxide and effective iodine waste immobilization by etidronic-Bi 2O 3 complex. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134688. [PMID: 38805823 DOI: 10.1016/j.jhazmat.2024.134688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 05/11/2024] [Accepted: 05/20/2024] [Indexed: 05/30/2024]
Abstract
The present work prepared a novel BiMgO-2MBD (X = 0.42) material for iodine vapor capture in temperature conditions related to spent nuclear fuel reprocessing and nuclear accidents. BiMgO-2MBD (X = 0.42) was synthesized by a solvothermal process and exhibited an exceptional ultrafast and high iodine uptake with a capacity of 4352.12 mg/g and 5147.08 mg/g after 5 h at 75 °C and 150 °C, respectively. The TGA analysis shows that Bi/Mg oxide substrate highly contributed to improving the thermal stability of the functionalized BiMgO-2MB (X = 0.42) as indicated by the weight losses of the material components of 3.77 wt%, 29.32 wt%, and 97.72 wt%, respectively for Bi/Mg oxide, BiMgO-2MBD, and 2-MBD. The material characterization and DFT calculations indicate that 2-MBD played a significant role towards improving iodine capture capacity. For long-term and safe waste disposal, a chemically durable waste form was made from etidronic acid and Bi2O3, and successfully immobilized the iodine-loaded wastes (I2 @BiMgO-2MBD) which exhibited a low normalized leaching rate of 1.098 × 10-6 g.m2/day for 7 days under the PCT-A method. In addition, BiMgO-2MBD (X = 0.42) showed an ability to be reused after several regeneration cycles. The comparison with previously reported materials shows that the current BiMgO-2MBD (X = 0.42) is the first functionalized metal oxide comparable to metal-organic and covalent organic frameworks for iodine uptake. BiMgO-2MBD (X = 0.42) shows promising results for practical applications in the gas phase capture of radioactive iodine.
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Affiliation(s)
- Constantin Muhire
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China
| | - Dongxiang Zhang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China; Department of Chemistry, MSU-BIT University, Shenzhen 517182, PR China.
| | - Cui Chang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China
| | - Xu Zhang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China
| | - Dagang Li
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China
| | - Guo Zhiren
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China
| | - Zilei Zhang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China
| | - Fengqi Zhang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China
| | - Jinzheng Hou
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China
| | - Jinying Li
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China; China National Nuclear Corporation, Beijing 100822, China
| | - Xiyan Xu
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, PR China.
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Jung YE, Yang JH, Yim MS. Investigation of bismuth-based metal-organic frameworks for effective capture and immobilization of radioiodine gas. JOURNAL OF HAZARDOUS MATERIALS 2024; 467:133777. [PMID: 38359759 DOI: 10.1016/j.jhazmat.2024.133777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/09/2024] [Accepted: 02/10/2024] [Indexed: 02/17/2024]
Abstract
In this study, we investigated the use of Bi-mna, a specific type of bismuth metal organic framework (MOF) for the capture and disposal of iodine, a key nuclide of concern in nuclear fuel reprocessing plants and nuclear power plants. To find the suitable form of Bi-mna for the purpose, experiments were performed by synthesizing four different Bi-mna with varying reagent ratios and connecting iodine adsorption and conversion for immobilization. After iodine adsorption and characterization to investigate their adsorption mechanisms, the Bi-mna samples went through conversion for immobilization to fix captured iodine into the adsorbents. The converted materials are characterized to examine their thermal stability. The Bi-2mna, showing the best performance of adsorption and thermal stability after the conversion, was selected to explore its chemical stability. According to the test results, the converted compound showed relatively low leaching rate (3.06 ×10-5 g/m2∙day) compared with other iodine containing waste forms for disposal. Based on the results, we proposed the Bi-2mna as a candidate material as iodine adsorbent as well as waste form precursor. ENVIRONMENTAL IMPLICATION: Radioiodine a key nuclide of concern in nuclear fuel reprocessing plants and nuclear power plants. Once ingested, it is accumulated in thyroid grand, causing negative health effects. Currently, a typical radioiodine adsorbent is silver-based zeolites. Despite a strong affinity to iodine of silver, it has a chemical toxicity that causes a potential issue in disposal. Therefore, it is substantially required to develop new type of adsorbents which are both good for capture and disposal of radioiodine. In this respect, we suggested a bismuth-based metal-organic framework as an alternative adsorbent to manage the life cycle of radioiodine.
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Affiliation(s)
- Young Eun Jung
- Advanced Fuel Cycle Technology Division, Korea Atomic Energy Research Institute, 111 Daedeok-daero, 989 beon-gil, Yuseong-gu, Daejeon 34057, South Korea
| | - Jae Hwan Yang
- Department of Environmental & IT Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, South Korea.
| | - Man-Sung Yim
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea.
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Galotta A, Demir Ö, Marsan O, Sglavo VM, Loca D, Combes C, Locs J. Apatite/Chitosan Composites Formed by Cold Sintering for Drug Delivery and Bone Tissue Engineering Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:441. [PMID: 38470772 DOI: 10.3390/nano14050441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/23/2024] [Accepted: 02/24/2024] [Indexed: 03/14/2024]
Abstract
In the biomedical field, nanocrystalline hydroxyapatite is still one of the most attractive candidates as a bone substitute material due to its analogies with native bone mineral features regarding chemical composition, bioactivity and osteoconductivity. Ion substitution and low crystallinity are also fundamental characteristics of bone apatite, making it metastable, bioresorbable and reactive. In the present work, biomimetic apatite and apatite/chitosan composites were produced by dissolution-precipitation synthesis, using mussel shells as a calcium biogenic source. With an eye on possible bone reconstruction and drug delivery applications, apatite/chitosan composites were loaded with strontium ranelate, an antiosteoporotic drug. Due to the metastability and temperature sensitivity of the produced composites, sintering could be carried out by conventional methods, and therefore, cold sintering was selected for the densification of the materials. The composites were consolidated up to ~90% relative density by applying a uniaxial pressure up to 1.5 GPa at room temperature for 10 min. Both the synthesised powders and cold-sintered samples were characterised from a physical and chemical point of view to demonstrate the effective production of biomimetic apatite/chitosan composites from mussel shells and exclude possible structural changes after sintering. Preliminary in vitro tests were also performed, which revealed a sustained release of strontium ranelate for about 19 days and no cytotoxicity towards human osteoblastic-like cells (MG63) exposed up to 72 h to the drug-containing composite extract.
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Affiliation(s)
- Anna Galotta
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Öznur Demir
- Institute of Biomaterials and Bioengineering, Faculty of Natural Sciences and Technology, Riga Technical University, Pulka St. 3, LV-1007 Riga, Latvia
- Baltic Biomaterials Centre of Excellence, Riga Technical University, Pulka St. 3, LV-1007 Riga, Latvia
| | - Olivier Marsan
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 4 Allée Emile Monso, BP 44362, CEDEX 4, 31030 Toulouse, France
| | - Vincenzo M Sglavo
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Dagnija Loca
- Institute of Biomaterials and Bioengineering, Faculty of Natural Sciences and Technology, Riga Technical University, Pulka St. 3, LV-1007 Riga, Latvia
- Baltic Biomaterials Centre of Excellence, Riga Technical University, Pulka St. 3, LV-1007 Riga, Latvia
| | - Christèle Combes
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 4 Allée Emile Monso, BP 44362, CEDEX 4, 31030 Toulouse, France
| | - Janis Locs
- Institute of Biomaterials and Bioengineering, Faculty of Natural Sciences and Technology, Riga Technical University, Pulka St. 3, LV-1007 Riga, Latvia
- Baltic Biomaterials Centre of Excellence, Riga Technical University, Pulka St. 3, LV-1007 Riga, Latvia
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Chee TS, Lee S, Ng WJ, Akmal M, Ryu HJ. Bi 0-Reduced Graphene Oxide Composites for the Enhanced Capture and Cold Immobilization of Off-Gas Radioactive Iodine. ACS APPLIED MATERIALS & INTERFACES 2023; 15:40438-40450. [PMID: 37581564 DOI: 10.1021/acsami.3c06761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
Radioactive waste management is critical for maintaining the sustainability of nuclear fuel cycles. In this study, we propose a novel bismuth-based reduced graphene oxide (Bi0-rGO) composite for the immobilization of off-gas radioactive iodine. This material synthesized via a solvothermal route exhibited a low surface area (2.96 m2/g) combined with a maximum iodine sorption capacity of 1228 ± 25 mg/g at 200 °C. The iodine sorbent was mixed with Bi2O3 powder and distilled water to fabricate waste matrices, which were cold-sintered at 300 °C under a uniaxial pressure of 500 MPa for 20 min to achieve a relative density of ∼98% and Vickers hardness of 1.3 ± 0.1 GPa. The utilized methodology reduced the iodine leaching rate by approximately 3 orders of magnitude through the formation of a chemically durable iodine-bearing waste form (BiOI). This study demonstrates the high potential of Bi0-rGO as an innovative solution for the immobilization of radioactive waste at relatively low temperatures.
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Affiliation(s)
- Tien-Shee Chee
- Department of Materials Science and Engineering, KAIST, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sujeong Lee
- Department of Materials Science and Engineering, KAIST, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Woei Jer Ng
- Department of Nuclear and Quantum Engineering, KAIST, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Muhammad Akmal
- Department of Materials Science and Engineering, KAIST, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ho Jin Ryu
- Department of Materials Science and Engineering, KAIST, Yuseong-gu, Daejeon 34141, Republic of Korea
- Department of Nuclear and Quantum Engineering, KAIST, Yuseong-gu, Daejeon 34141, Republic of Korea
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Yu RL, Li QF, Li ZL, Wang XY, Xia LZ. Analysis of Radioactive Iodine Trapping Mechanism by Zinc-Based Metal-Organic Frameworks with Various N-Containing Carboxylate Ligands. ACS APPLIED MATERIALS & INTERFACES 2023; 15:35082-35091. [PMID: 37458304 DOI: 10.1021/acsami.3c07032] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
This study aimed to develop effective adsorbents for capturing radioactive iodine in nuclear power waste gas. Two zinc metal-organic frameworks (Zn-MOFs) were synthesized and found to have favorable properties such as a large surface area, thermal stability, surface rich in π-electron-containing nitrogen, and redox potential. Adsorption experiments revealed maximum capacities of 1.25 and 1.96 g g-1 for the MOFs at 75 °C, with the pseudo-second-order kinetic model fitting the data well. The Langmuir equation provided a better fit in cyclohexane, with maximum adsorption amounts of 249 and 358 mg g-1 for Zn-MOF-1 and Zn-MOF-2, respectively. The MOFs were also stable during six cycles of adsorption and desorption. Furthermore, electron transfer occurred due to the synergistic adsorption of Zn, N, and O atoms, resulting in the conversion of some iodine to polyiodide. Zn-MOF-2 exhibited better chemisorption than Zn-MOF-1 due to a smaller highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap. Notably, it was discovered that N-containing radicals had stronger interactions with iodine compared to radicals without N. These findings provide valuable insights into MOF synthesis and environmental protection.
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Affiliation(s)
- Rui-Li Yu
- Department of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Qian-Fan Li
- Department of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhen-Le Li
- Department of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xiao-Yu Wang
- Department of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Liang-Zhi Xia
- Department of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
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Lee S, Kim YI, Akmal M, Ryu HJ. Effects of Cold Sintering on the Performance of Zeolite 13X as a Consolidated Adsorbent for Cesium. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37487116 DOI: 10.1021/acsami.3c08628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
Cold sintering, a novel low-temperature consolidation technique, has shown promising results in various inorganic materials. However, the application of this technique to nanoporous materials for energy and environmental fields is not yet fully understood. This study investigates the effects of cold sintering on the relative densities, compressive strengths, chemical durabilities, crystal structures, specific surface areas, and adsorption capacities of zeolites. Cold sintering at 200 °C achieved 10 to 20% greater densification than conventional high temperature (700 °C) sintering; however, the original nanoporous structure of dry cold sintered zeolite was not maintained. Introducing liquid agents during the cold sintering process resulted in reduced degradation of the SSA and increased densification. Using NaOH as the liquid agent increased the solubility of elements in zeolite, which promoted chemical mobility and achieved the highest relative density (96.7 ± 2.8%). However, soluble layers between the particles led to fragmentation, making it unsuitable for aqueous applications. Using H2O as the liquid agent resulted in a relative density of 90.4 ± 4.1% while maintaining the nanoporous properties and structural integrity of zeolite under water. The cesium adsorption capacity (19.0 ± 0.1 mg·g-1) was similar to that of conventional zeolite ion exchangers, indicating that cold sintering with H2O was an efficient, economical, and safer alternative to conventional high-temperature consolidation method. Our findings suggest that this cold sintering can be applied to other nanoporous materials, such as metal-organic frameworks and covalent organic frameworks, in separation, catalysis, and adsorption applications.
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Affiliation(s)
- Sujeong Lee
- Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Yong-Il Kim
- Korea Research Institute of Standards and Science, Daejeon 34113, South Korea
| | - Muhammad Akmal
- Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
| | - Ho Jin Ryu
- Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
- Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea
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Asmussen RM, Turner J, Chong S, Riley BJ. Review of recent developments in iodine wasteform production. Front Chem 2022; 10:1043653. [PMID: 36618856 PMCID: PMC9816813 DOI: 10.3389/fchem.2022.1043653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
Radioiodine capture and immobilization is not only important to consider during the operation of reactors (i.e., I-131), during nuclear accidents (i.e., I-131 and I-129) or nuclear fuel reprocessing (i.e., I-131 and I-129), but also during disposal of nuclear wastes (i.e., I-129). Most disposal plans for I-129-containing waste forms (including spent nuclear fuel) propose to store them in underground repositories. Here, iodine can be highly mobile and, given its radiotoxicity, needs to be carefully managed to minimize long-term environmental impacts arising from disposal. Typically, any process that has been used to capture iodine from reprocessing or in a reactor is not suitable for direct disposal, rather conversion into a wasteform for disposal is required. The objectives of these materials are to use either chemical immobilization or physical encapsulation to reduce the leaching of iodine by groundwaters. Some of the more recent ideas have been to design capture materials that better align with disposal concepts, making the industrial processing requirements easier. Research on iodine capture materials and wasteforms has been extensive. This review will act as both an update on the state of the research since the last time it was comprehensively summarized, and an evaluation of the industrial techniques required to create the proposed iodine wasteforms in terms of resulting material chemistry and applicability.
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Affiliation(s)
- R. Matthew Asmussen
- Pacific Northwest National Laboratory, Richland, WA, United States,*Correspondence: R. Matthew Asmussen, ; Joshua Turner,
| | - Joshua Turner
- National Nuclear Laboratory, Sellafield, Cumbria, United Kingdom,*Correspondence: R. Matthew Asmussen, ; Joshua Turner,
| | - Saehwa Chong
- Pacific Northwest National Laboratory, Richland, WA, United States
| | - Brian J. Riley
- Pacific Northwest National Laboratory, Richland, WA, United States
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Xian Q, Xiao X, Yu J, Gan Y, Chen L, He X, Wang E, Dan H, Zhu L, Ding Y, Duan T. High Retention Immobilization of Iodine in B–Bi–Zn Oxide Glass Using Bi 2O 3 as a Stabilizer under a N 2 Atmosphere. Inorg Chem 2022; 61:19633-19641. [DOI: 10.1021/acs.inorgchem.2c03601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Qiang Xian
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Xin Xiao
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Jiaping Yu
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Yi Gan
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Li Chen
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Xinmiao He
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Enchao Wang
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Hui Dan
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Lin Zhu
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
- National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang621010, China
- State Key Laboratory of Environment-friendly Energy Materials, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang621010, China
| | - Yi Ding
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
| | - Tao Duan
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang621010, China
- National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang621010, China
- State Key Laboratory of Environment-friendly Energy Materials, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang621010, China
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Reiser JT, Lawter AR, Avalos NA, Bonnett J, Riley BJ, Chong S, Canfield N, Saslow SA, Bourchy A, Asmussen RM. Review and experimental comparison of the durability of iodine waste forms in semi-dynamic leach testing. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100300] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Zahid M, Zhang D, Xu X, Pan M, Ul Haq MH, Reda AT, Xu W. Barbituric and thiobarbituric acid-based UiO-66-NH 2 adsorbents for iodine gas capture: Characterization, efficiency and mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125835. [PMID: 34492792 DOI: 10.1016/j.jhazmat.2021.125835] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/01/2021] [Accepted: 04/04/2021] [Indexed: 06/13/2023]
Abstract
Efficient iodine gas capture is necessitated in many industries like spent nuclear fuel off-gas treatment in view of environmental protection and resource recycling. However, the adsorption efficiency and stability of the current adsorbents are limited. In the present work, efficient and stable barbituric and thiobarbituric acid-based UiO-66-NH2 adsorbents (i.e., UiO-66-NH-B.D and UiO-66-NH-T.D, respectively) have been synthesized by post-synthetic covalent modification. Characterization approaches, including SEM-EDS, TEM, XRD, FTIR, XPS, 1H NMR, TGA and BET, are used to obtain information on the properties and adsorption mechanisms of these metal-organic framework (MOF) adsorbents. The kinetics and mechanisms involved are studied in detail. The treatment efficiency and recyclability of the adsorbents are checked and compared with the adsorbents reported in previous works. The results show that the current adsorbents are potentially suitable for efficient iodine gas capture. High maximum iodine adsorption amount by UiO-66-NH-B.D and UiO-66-NH-T.D (1.17 and 1.33 g/g) was achieved under 75 °C. These new adsorbents are thermally stable for iodine adsorption and regenerated and reused with good performance. The adsorption mechanisms were revealed based on experimental results, indicating that iodine is adsorbed by both physisorption and chemisorption.
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Affiliation(s)
- Muhammad Zahid
- College of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Dongxiang Zhang
- College of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
| | - Xiyan Xu
- College of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
| | - Meng Pan
- College of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Muhammad Hammad Ul Haq
- College of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Alemtsehay Tesfay Reda
- College of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Wenguo Xu
- College of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
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