磁性海藻酸盐支撑的亚铁氰化钾锰用于从酸性废水中回收铀

IF 1.4 3区 化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR
Tingting Li, Fang Wang, Liangshu Xia
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引用次数: 0

摘要

随着原子能工业的飞速发展,核燃料的需求量不断增加,而铀矿资源有限,难以满足未来核能发展的需要。扩大铀的获取渠道十分必要,而从含铀废水中浓缩和回收贵重铀则显得弥足珍贵。通过合成海藻酸盐支撑的具有磁响应的纳米锰铁氰化钾复合材料(KMnFC/MA/Fe3O4),可以方便快捷地实现酸性含铀废水中铀的高效吸附和分离。通过多种技术手段对磁性复合材料进行了表征,并通过不同环境条件下的静态吸附实验研究了磁性材料对铀的吸附行为。利用一些常用的线性吸附模型研究了 KMnFC/MA/Fe3O4 对铀的吸附动力学和等温线。结果表明,KMnFC/MA/Fe3O4 对铀的吸附速率很快,90 min 内即可达到吸附平衡。吸附过程符合假二级动力学模型,以化学吸附为主。KMnFC/MA/Fe3O4 磁性材料对铀的吸附为单分子层吸附,35 ℃ 时的最大吸附容量为 425.5 mg g-1。KMnFC/MA/Fe3O4对低浓度铀废水的处理效果好,处理后废水中铀的浓度达到排放标准,且吸附后易于磁分离,是一种在酸性低浓度铀废水处理领域很有前景的吸附剂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Magnetic alginate supported potassium manganese ferrocyanide for the recovery of uranium from acidic wastewater
With the rapid development of the atomic energy industry, the demand for nuclear fuel has risen, while the limited resources of uranium mines make it difficult to meet the needs of the future development of nuclear energy. Expanding sources of uranium acquisition is necessary, and the enrichment and recovery of precious uranium from uranium-containing wastewater is invaluable. By synthesizing alginate supported potassium manganese ferrocyanide nanocomposites with magnetic response (KMnFC/MA/Fe3O4), the high efficiency adsorption and separation of uranium in acidic uranium-containing wastewater can be realized conveniently and quickly. The magnetic composite was characterized by a variety of technical means, and the adsorption behavior of the magnetic material on uranium was studied by static adsorption experiments under different environmental conditions. The adsorption kinetics and isotherm of uranium by KMnFC/MA/Fe3O4 were studied by using some common linear adsorption models. The results show that the adsorption rate of KMnFC/MA/Fe3O4 on uranium is fast, and the adsorption equilibrium can be reached within 90 min. The adsorption process conforms to a pseudo-secondary kinetic model and is dominated by chemisorption. The adsorption of uranium by KMnFC/MA/Fe3O4 magnetic material is single molecular layer adsorption, and the maximum adsorption capacity is 425.5 mg g−1 at 35 °C. KMnFC/MA/Fe3O4 is a promising adsorbent in the field of acidic low-concentration uranium wastewater treatment because of its good effect on the treatment of low concentration uranium wastewater, the concentration of uranium in the wastewater reaches the emission standard after treatment and it is easy to be separated magnetically after adsorption.
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来源期刊
Radiochimica Acta
Radiochimica Acta 化学-核科学技术
CiteScore
2.90
自引率
16.70%
发文量
78
审稿时长
6 months
期刊介绍: Radiochimica Acta publishes manuscripts encompassing chemical aspects of nuclear science and technology.
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