| 胡梦石,李乾,刘婷婷,孙静.改性石墨毡电极的构建及其对UO2＋2的吸附机理[J].南华大学学报(自然科学版),2024,(5):1~8, 16.[HU Mengshi,LI Qian,LIU Tingting,SUN Jing.Construction of Modified Graphite Felt Electrode and its Adsorption Mechanism for UO2＋2[J].Journal of University of South China(Science and Technology),2024,(5):1~8, 16.] |
| 改性石墨毡电极的构建及其对UO2＋2的吸附机理 |
| Construction of Modified Graphite Felt Electrode and its Adsorption Mechanism for UO2＋2 |
| 投稿时间：2024-03-22 |
| DOI： |
| 中文关键词: 羧基化多壁碳纳米管 氧化铜 纳米银 电吸附 铀 |
| 英文关键词:carboxylated multi-walled carbon nanotubes copper oxide nano silver electrosorption uranium |
| 基金项目:国家自然科学基金青年科学项目(52304189);湖南省教育厅优秀青年项目(22B0438) |
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| 中文摘要: |
| 核燃料循环所产生的含铀废水对人类健康和生态环境造成了严重危害。本研究制备了一种羧基化多壁碳纳米管/氧化铜/纳米银改性石墨毡(carboxylated multi-walled carbon nanotube/copper oxide/nano silver,MCA)电极材料,开展电容去离子(capacitive deionization,CDI)实验,系统研究了不同复合材料改性电极对UO2＋2的电吸附性能及不同作用条件(电压、pH、UO2＋2质量浓度等)对改性电极MCA-2电吸附UO2＋2的影响,以探讨其对UO2＋2的吸附机理。结果表明,在不同改性电极中,MCA-2对UO2＋2的去除率最高,为93.39%；MCA-2是具有双电层(electrical double layer,EDL)和赝电容特性的高混合电容电极,在较宽的电压、pH和质量浓度范围内,均对UO2＋2有较高的去除率；结果表明,MCA-2通过电吸附可以有效去除水溶液中的铀。 |
| 英文摘要: |
| Uranium-containing wastewater from the nuclear fuel cycle poses severe hazards to human health and the ecological environment. In this study, a carboxylated multi-walled carbon nanotube/copper oxide/nano-silver-modified graphite felt (MCA) electrode material was prepared. Capacitive deionization (CDI) experiments were conducted to systematically investigate the electrosorption performance of UO2＋2 using electrodes modified with different composite materials, as well as the effects of various operating conditions (voltage, pH, UO2＋2 concentration, etc.) on the electrosorption performance of the MCA-2 electrode. The adsorption mechanism of UO2＋2 was explored. Results showed that among the different modified electrodes, MCA-2 exhibited the highest UO2＋2 removal efficiency, reaching 93.39%. MCA-2 is a high-capacitance hybrid electrode with both electrical double layer (EDL) and pseudocapacitive properties. It maintained high removal efficiency for UO2＋2 across a wide range of voltage, pH, and concentration conditions. The results showed that MCA-2 could effectively remove uranium from aqueous solution by electrosorption. |
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