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Yang Y, Zhao X, Zhang X, Li H. Influence of Wave-Absorbing Materials on the Heating Efficiency in Microwave Heating Treatment of Contaminated Soil. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7655. [PMID: 38138797 PMCID: PMC10744507 DOI: 10.3390/ma16247655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/06/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
China has a lot of wastelands that are usually overly contaminated as a result of the relocation of industrial enterprises. Given that long-term threats are thus generated, safe and effective treatment routines are urgently needed. Due to its low carbon footprint and environmental protection benefits, the microwave heating treatment of contaminated soil has generated substantial academic interest. Nevertheless, wave-absorbing materials must be added during the treatment process to holistically enhance the effectiveness of heating the contaminated soil. Therefore, this study selects three typical wave-absorbing materials, i.e., Fe3O4, SiC and activated carbon, to explore the influence of the addition of wave-absorbing materials on the microwave heating efficiency for contaminated soil. Moreover, the changes in the mineral phases and microscopic morphology of the contaminated soil and wave-absorbing materials after heating at different temperatures are analyzed. It is concluded that the heating rate would reach 39.5 °C/min when the amount of additive Fe3O4 reaches 8%; when the temperature exceeds 300 °C, the Fe3O4 will be gradually oxidized to Fe2O3. Activated carbon is a wave-absorbing material that has a higher thermal stability than Fe3O4, although it has less impact on the heating rate. The ability of SiC to absorb waves has a limited impact on the heating rate. During microwave heating, the microscopic morphology of the contaminated soil and wave-absorbing materials do not change significantly.
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Affiliation(s)
- Yuxuan Yang
- College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; (Y.Y.); (X.Z.); (X.Z.)
| | - Xiang Zhao
- College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; (Y.Y.); (X.Z.); (X.Z.)
| | - Xueqian Zhang
- College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; (Y.Y.); (X.Z.); (X.Z.)
| | - Hui Li
- College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; (Y.Y.); (X.Z.); (X.Z.)
- Shaanxi Ecological Cement & Concrete Engineering Technology Research Center, Xi’an 710055, China
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Xin J, Hong C, Wei J, Qie J, Wang H, Lei B, Li X, Cai Z, Kang Q, Zeng Z, Liu Y. A comprehensive review of radioactive pollution treatment of uranium mill tailings. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:102104-102128. [PMID: 37684506 DOI: 10.1007/s11356-023-29401-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 08/15/2023] [Indexed: 09/10/2023]
Abstract
Natural uranium is a crucial resource for clean nuclear energy, which has brought significant economic and social benefits to humanity. However, the development and utilization of uranium resources have also resulted in the accumulation of vast amounts of uranium mill tailings (UMTs), which pose a potential threat to human health and the ecological environment. This paper reviews the research progress on UMTs treatment technologies, including cover disposal, solidification disposal, backfilling disposal, and bioremediation methods. It is found that cover disposal is a versatile method for the long-term management of UMTs, the engineering performance and durability of the cover system can be improved by choosing suitable stabilizers for the cover layer. Solidification disposal can convert UMTs into solid waste for permanent disposal, but it produces a large amount of waste and requires high operating costs; it is necessary to explore the effectiveness and efficiency of solidification disposal for UMTs, while minimizing the bad environmental impact. Backfilling disposal realizes the resource utilization of solid waste, but the high radon exhalation rate caused by the UMTs backfilling also needs to be considered. Bioremediation methods have low investment costs and are less likely to cause secondary pollution, but the remediation efficiency is low, it can be combined with other treatment technologies to remedy the defects of a single remediation method. The article concludes with key issues and corresponding suggestions for the current UMTs treatment methods, which can provide theoretical guidance and reference for further development and application of radioactive pollution treatment of UMTs.
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Affiliation(s)
- Jiayi Xin
- School of Resources, Environmental and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Changshou Hong
- School of Resources, Environmental and Safety Engineering, University of South China, Hengyang, 421001, China.
| | - Jia Wei
- School of Resources, Environmental and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Jingwen Qie
- School of Resources, Environmental and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Hong Wang
- School of Resources, Environmental and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Bo Lei
- School of Resources, Environmental and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Xiangyang Li
- School of Resources, Environmental and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Ziqi Cai
- School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710000, China
| | - Qian Kang
- School of Emergency Management and Safety Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Zhiwei Zeng
- Department of Radiological Medicine and Environmental Medicine, China Institute for Radiation Protection, Taiyuan, 030000, China
| | - Yong Liu
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518061, China
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Immobilization of simulated strontium contaminated zeolite: microstructure and chemical durability. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08465-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Yan M, Luo F, Shu X, Tang H, Chen S, Wei G, Xie Y, Wang L, Lu X. Response of simulated An3+/An4+ radioactive soil vitrification under alpha-particle irradiation. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Immobilization of uranium soils with alkali-activated coal gangue–based geopolymer. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07812-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tang H, Shu X, Huang W, Miao Y, Shi M, Chen S, Li B, Luo F, Xie Y, Shao D, Lu X. Rapid solidification of Sr-contaminated soil by consecutive microwave sintering: mechanism and stability evaluation. JOURNAL OF HAZARDOUS MATERIALS 2021; 407:124761. [PMID: 33316687 DOI: 10.1016/j.jhazmat.2020.124761] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/06/2020] [Accepted: 12/01/2020] [Indexed: 06/12/2023]
Abstract
Consecutive microwave sintering is a method proposed in this study to dispose soil contaminated by Sr during a nuclear accident by rapidly solidifying the contaminated soil. The results show that soil contaminated with 20 wt% SrSO4 and 30 wt% SrSO4 can be completely solidified by microwave sintering at 1100-1200 and 1300 ℃, respectively, for 30 min. Sr was found to be cured into slawsonite (SrAl2Si2O8) and glass structures. Moreover, soil sintered at 1300 ℃ has large cured solubility (30 wt.%), good uniformity, and excellent hardness (6.9-7.2 GPa) and chemical durability (below 1.46 × 10-5 g m-2 d-1 at 28 d). Thus, consecutive microwave sintering technology may provide a new method for treating Sr-contaminated soil in case of a nuclear accident emergency.
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Affiliation(s)
- Hexi Tang
- State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, PR China; Sichuan Radiation Detection & Protection Institute of Nuclear Industry, Chengdu 610052, PR China
| | - Xiaoyan Shu
- National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, PR China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Wenxiao Huang
- Guangdong Provincial Key Laboratory of Radioactive and Rare Resource Utilization, Shaoguan 512026, PR China
| | - Yulong Miao
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Minghe Shi
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Shunzhang Chen
- Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, PR China
| | - Bingsheng Li
- State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, PR China; National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Fen Luo
- National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, PR China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Yi Xie
- University of Science and Technology of China, Hefei 230026, PR China; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, PR China
| | - Dadong Shao
- Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Xirui Lu
- State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, PR China; National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, PR China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, PR China.
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