High-temperature carbonization synthesis of coal fly ash/chitosan-carbon composite electrodes for enhanced uranium electroadsorption
文献类型：期刊论文
| 作者 | Zhang, Jianfeng2,3; You, Mu1; Wei, Yijun2; Xu, Mai2; Hu, Yunhu2 |
| 刊名 | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 12 |
| 关键词 | Coal fly ash Capacitive deionization Uranium Electrosorption |
| ISSN号 | 2213-2929 |
| DOI | 10.1016/j.jece.2024.113566 |
| 通讯作者 | Xu, Mai(xumai2215@163.com) ; Hu, Yunhu(huyunhu@ustc.edu.cn) |
| 英文摘要 | Various coal fly ash (CFA)-based adsorbents have been utilized for heavy metal ion adsorption, but their potential in electroadsorption of radioactive nuclides has not yet been explored. In this study, a CFA/chitosan (CS) hybrid material was successfully carbonized at 500 degree celsius under an argon atmosphere to prepare a CFA/chitosancarbon (CSC) composite, which was then employed as the cathode electrode in a capacitive deionization (CDI) device for the electrosorption of U(VI). Electrochemical tests showed the CFA/CSC composite had a higher specific capacitance of 1.19 F/g compared to CFA (0.48 F/g) and CSC (0.55 F/g), due to synergistic electric double-layer capacitance and pseudocapacitance. The composite exhibited a lower equivalent series resistance (1.99 Omega) than CFA (3.51 Omega) and CSC (2.46 Omega), indicating better conductivity. It also demonstrated excellent stability, maintaining performance over 1000 charge-discharge cycles. These properties facilitate charge transfer and ion adsorption, enabling the CFA/CSC composite electrode to achieve a removal efficiency of up to 87.30 % in a 120 mg/L U(VI) solution. Experimental results demonstrated that the CFA/CSC composite electrode reached a saturated adsorption capacity of 253.82 mg/g for U(VI) at an applied voltage of 1.2 V, with the adsorption process conforming to the Langmuir isotherm model. Although the adsorption capacity of the CFA/CSC composite is not as high as some high-performance adsorbents, its low cost suggest significant potential for largescale applications. Future research should focus on optimizing the composite structure and exploring surface modifications to enhance adsorption performance and broaden the applicability of this material for radionuclide removal. |
| WOS关键词 | AQUEOUS-SOLUTION ; EFFICIENT REMOVAL ; ELECTROSORPTION ; U(VI) ; CHITOSAN ; ASH ; VI |
| 资助项目 | The 2023 Anhui Province Higher Education Young and Middle-aged Teacher Training Project[DTR20230412023] ; National Natural Science Foundation of China[22078121] ; Natural Science Foundation of the Anhui Higher Education Institutions of Anhui[KJ2021A0963] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001270217300001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | The 2023 Anhui Province Higher Education Young and Middle-aged Teacher Training Project ; National Natural Science Foundation of China ; Natural Science Foundation of the Anhui Higher Education Institutions of Anhui |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/137113]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xu, Mai; Hu, Yunhu |
| 作者单位 | 1.Huainan Normal Univ, Sch Biol Engn, Huainan 232000, Anhui, Peoples R China 2.Huainan Normal Univ, Anhui Engn Res Ctr Photoelectrocatalyt Electrode M, Sch Chem & Mat Engn, Huainan 232038, Anhui, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jianfeng,You, Mu,Wei, Yijun,et al. High-temperature carbonization synthesis of coal fly ash/chitosan-carbon composite electrodes for enhanced uranium electroadsorption[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2024,12. |
| APA | Zhang, Jianfeng,You, Mu,Wei, Yijun,Xu, Mai,&Hu, Yunhu.(2024).High-temperature carbonization synthesis of coal fly ash/chitosan-carbon composite electrodes for enhanced uranium electroadsorption.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,12. |
| MLA | Zhang, Jianfeng,et al."High-temperature carbonization synthesis of coal fly ash/chitosan-carbon composite electrodes for enhanced uranium electroadsorption".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 12(2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
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