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Li L, Lv J, Liu W, Ma Q, Tan W. Study on uranium leaching from uranium purification residue with ammonium hydrogen fluoride. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2024; 276:107441. [PMID: 38677042 DOI: 10.1016/j.jenvrad.2024.107441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/16/2024] [Accepted: 04/20/2024] [Indexed: 04/29/2024]
Abstract
Residues generated from the uranium purification process, characterized by a high uranium content, pose a significant challenge for recovery through leaching and present a considerable environmental threat. After using XRD and SEM-mapping characterization analysis combined with the BCR continuous graded extraction test to analyze the content of different states of uranium, it was found that the main reason why the uranium in the residue was difficult to leach because it was encapsulated by SiO2 crystals. Using NH4HF2 as a leaching agent, a leaching study of uranium in the residue was carried out, and the results showed that the H+ and F- produced by NH4HF2could react with SiO2, destroying the crystal lattice of SiO2 and causing the encapsulated uranium to come into contact with the leaching agent, facilitating the leaching of uranium in the residue. The optimum conditions for uranium leaching were 10% mass fraction of NH4HF2, a liquid-solid ratio of 30:1, a reaction temperature of 30 °C and a reaction time of 120 min, and the leaching efficiency of uranium from the residue was as high as 98.95%. The leaching kinetics of uranium by NH4HF2 were consistent with the mixed controlled model in the shrinking core models, indicating that the surface chemical reaction and mass diffusion dominated both uranium leaching processes. This may provide a viable method for resource recovery and the treatment of uranium purification residues.
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Affiliation(s)
- Lingxin Li
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, China.
| | - Junwen Lv
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, China; Hengyang Key Laboratory of Contamination Control and Remediation, Hengyang, 421001, China.
| | - Wang Liu
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, China
| | - Qiang Ma
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, China; Hengyang Key Laboratory of Contamination Control and Remediation, Hengyang, 421001, China
| | - Wenfa Tan
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, China; Hengyang Key Laboratory of Contamination Control and Remediation, Hengyang, 421001, China
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Chai L, Li T, Liu X, Dai S, Liu X, Sun Y, Pan J. Rapid recovery of high pure PbO from spent lead acid battery without desulfation and chemicals consumption method. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 184:52-62. [PMID: 38795540 DOI: 10.1016/j.wasman.2024.05.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/06/2024] [Accepted: 05/19/2024] [Indexed: 05/28/2024]
Abstract
The direct recovery of high-purity PbO from spent lead paste without a pre-desulfation process has significant industrial promise. Herein, we propose a recyclable, ultra-fast, and high value-added closed-loop of high-purity PbO recovery process by intensive multidentate coordination of histidine with crude 2PbO·PbSO4 by a rotating liquid-film (RLF) reactor and CO2 carbonation-dissociation. Parameter optimizations and kinetic calculations show the leaching time is shortened from 40 min to 60 s with 99.14 % leaching rate and 99.99 % PbO purity by internal diffusion control, where the RLF reactor promotes mass transfer and reaction rates by instantly renewing the surface of crude 2PbO·PbSO4. Furthermore, all 5 batches reveal that the separation of SO42- ions from the regenerated mother liquid with Ba(OH)2 significantly improves the recycling rate of the mother liquid and high-purity PbO product. This new strategy reveals a bright prospect of a highly efficient, high value-added, and environmentally friendly recycling route for solid waste resources.
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Affiliation(s)
- Lulu Chai
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
| | - Tian Li
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaowei Liu
- Chilwee Power Group, Changxing 313100, Zhejiang, China
| | - Shaozhen Dai
- Chilwee Power Group, Changxing 313100, Zhejiang, China
| | - Xiaoguang Liu
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yanzhi Sun
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
| | - Junqing Pan
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
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Chai L, Li Z, Wang K, Liu X, Dai S, Liu X, Sun Y, Pan J. Ultra-Fast Recyclable and Value-Added Desulfation Method for Spent Lead Paste via Dual Intensification Processes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304863. [PMID: 37867231 DOI: 10.1002/advs.202304863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/08/2023] [Indexed: 10/24/2023]
Abstract
The new low-cost clean pre-desulfation technology is very important in pyrometallurgy and hydrometallurgy. However, traditional reactors have low space-time yield and desulfation rate, resulting in high energy consumption and SO2 emissions in the industrial desulfation processes. Herein, dual rotating liquid film reactors (RLFRs) and lime are proposed to construct a recyclable, ultra-fast, and value-added desulfation method. Parameter optimization and kinetic calculations prove that the above reactions are controlled by internal diffusion, revealing that RLFR promotes the mass transfer and reaction rate. The new process greatly shortens the desulfation time of lead paste from 40 min to 10 s with a high desulfation rate of 99.7%, and the sulfation time of lime from 30 min to 30 s with a sulfation rate of 98.6% with a net profit of 55.99 ¥/ton by cost accounting. Moreover, ten batches of continuous scale-up experiments demonstrate the stability of processes, the desulfation and sulfation rates are kept at 99.7% and 98.2%, which greatly reduces the emissions of waste desulfate liquor. This work provides a new universal strategy for a sustainable, low-cost, and clean desulfation method of waste resources to achieve technical and economic feasibility.
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Affiliation(s)
- Lulu Chai
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zhiyu Li
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Keyu Wang
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiaowei Liu
- Chilwee Power Group, Changxing, Zhejiang, 313100, China
| | - Shaozhen Dai
- Chilwee Power Group, Changxing, Zhejiang, 313100, China
| | - Xiaoguang Liu
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yanzhi Sun
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Junqing Pan
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
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Guo Z, Zhang Z, Cao X, Feng D. Fe-Ti bimetal oxide adsorbent for removing low concentration H 2S at room temperature. ENVIRONMENTAL TECHNOLOGY 2022; 43:3693-3705. [PMID: 33998970 DOI: 10.1080/09593330.2021.1931472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
ABSTRACTHerein, a series of Fe-Ti bimetal oxide adsorbents were prepared by reduction-co-precipitation method, and their performance in removing low concentration H2S at room temperature was investigated. The adsorbents were characterized by X-Ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Ultraviolet Visible diffuse reflectance spectroscopy (UV-Vis-DRS), X-Ray photoelectron spectroscopy (XPS) and N2 adsorption-desorption. The results showed that the addition of Ti increased the specific surface area, pore volume and small oligomeric Fe2O3 of ferrihydrite. When the Fe/Ti molar ratio was 8:1, Fe-Ti bimetal oxide formed a large amount of oligomeric Fe2O3, and its specific surface area and pore volume reached 344.99 m2/g and 0.34 cm3/g, respectively. At this time, Fe-Ti bimetal oxide exhibited the highest breakthrough sulfur capacity of 222.8 mg/g. High temperature calcination caused Fe-Ti bimetal oxide to form small specific surface area and pore volume, and produced crystalline α-Fe2O3. And the breakthrough sulfur capacity of Fe-Ti bimetal oxide decreased with the increasing calcination temperature. In addition, the desulfurization process conformed to the unreacted shrinking nucleus model.
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Affiliation(s)
- Zhuangzhuang Guo
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, People's Republic of China
| | - Zhihong Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, People's Republic of China
| | - Xiaoyan Cao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, People's Republic of China
| | - Dongfang Feng
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, People's Republic of China
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Xu Z, Li Y, Lin Y, Wang B, Gao P, Zhu T. Enhanced activity and sulfur resistance of Cu- and Fe-modified activated carbon for the reduction of NO by CO from regeneration gas. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01951a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reduction of NO by CO was proposed to be applied for regeneration gas to remove NOx from industrial flue gas with activated carbon purification technology.
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Affiliation(s)
- Zhicheng Xu
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuran Li
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Yuting Lin
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Bin Wang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Panting Gao
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
| | - Tingyu Zhu
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
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Wang C, Xuan J, Zhang L, Liu Z, Cui Q, Wang H. Low Temperature Adsorption Desulfurization Performance and Mechanism of CeFe/ZSM‐5 for H
2
S and SO
2
Mixture. ChemistrySelect 2020. [DOI: 10.1002/slct.202003414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chenyang Wang
- College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 210009 P. R. China
| | - Jianyu Xuan
- College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 210009 P. R. China
| | - Lin Zhang
- College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 210009 P. R. China
| | - Zongjian Liu
- College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 210009 P. R. China
- Research Institute of Sinopec Yangzi Petrochemical Nanjing Jiangsu 210048 P. R. China
| | - Qun Cui
- College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 210009 P. R. China
| | - Haiyan Wang
- College of Chemical Engineering Nanjing Tech University Nanjing Jiangsu 210009 P. R. China
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