| 纳米零价铁富集水体中的铀 |
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| 引用本文： | 李若繁,黄潇月,张伟贤,王伟,唐振平,滑熠龙. 纳米零价铁富集水体中的铀[J]. 南华大学学报(自然科学版), 2018, 32(5): 13-21 |
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| 作者姓名： | 李若繁 黄潇月 张伟贤 王伟 唐振平 滑熠龙 |
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| 作者单位： | 同济大学 污染控制与资源化研究国家重点实验室,上海 200092;同济大学 环境科学与工程学院, 上海 200092,同济大学 污染控制与资源化研究国家重点实验室,上海 200092;同济大学 环境科学与工程学院, 上海 200092,同济大学 污染控制与资源化研究国家重点实验室,上海 200092;同济大学 环境科学与工程学院, 上海 200092,同济大学 污染控制与资源化研究国家重点实验室,上海 200092;同济大学 化学科学与工程学院,上海 200092,南华大学 污染控制与资源化 技术湖南省重点实验室,湖南 衡阳 421001,同济大学 污染控制与资源化研究国家重点实验室,上海 200092;同济大学 环境科学与工程学院, 上海 200092;南华大学 资源环境与安全工程学院,湖南 衡阳 421001 |
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| 基金项目： | 国家自然科学基金资助项目(51578398);国家级博士后创新人才计划(BX201700172) |
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| 摘 要： | 应用纳米零价铁(nZVI)富集水体中的铀不但能够回收珍贵的铀资源,同时还可以避免放射性物质对环境的污染.研究结果表明纳米零价铁可快速高效地分离水体中的铀.nZVI对铀的最大富集负荷达到920.16 mg/g,溶液中铀离子的质量浓度可降低至0.03 mg/L以下.弱酸性的水质条件促进nZVI对铀的分离,且分离和还原效率随着nZVI投加量的增加、HCO-3浓度的降低而升高.高浓度的铀离子可水解形成UO3·2H2O沉淀,但Fe0和Fe2+的还原作用是nZVI分离铀离子的主要反应机理.nZVI富集尾矿水中铀资源的过程中可同步去除多种共存重金属污染物.
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| 关 键 词： | 铀 纳米零价铁 富集 还原 废水 |
| 收稿时间： | 2018-05-02 |
Enrichment of Uranium from Aqueous Solution with Nanoscale Zero-valent Iron |
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| LI Ruofan,HUANG Xiaoyue,ZHANG Weixian,WANG Wei,TANG Zhenping and HUA Yilong. Enrichment of Uranium from Aqueous Solution with Nanoscale Zero-valent Iron[J]. Journal of Nanhua University(Science and Technology), 2018, 32(5): 13-21 |
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| Authors: | LI Ruofan HUANG Xiaoyue ZHANG Weixian WANG Wei TANG Zhenping HUA Yilong |
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| Affiliation: | State Key Laboratory of Pollution Control and Resource Reuse,Tongji University, Shanghai 200092,China;College of Environmental Science and Engineering,Tongji University, Shanghai 200092,China,State Key Laboratory of Pollution Control and Resource Reuse,Tongji University, Shanghai 200092,China;College of Environmental Science and Engineering,Tongji University, Shanghai 200092,China,State Key Laboratory of Pollution Control and Resource Reuse,Tongji University, Shanghai 200092,China;College of Environmental Science and Engineering,Tongji University, Shanghai 200092,China,State Key Laboratory of Pollution Control and Resource Reuse,Tongji University, Shanghai 200092,China;School of Chemical Science and Engineering,Tongji University, Shanghai 200092,China,Hunan Provincial Key Laboratory of Pollution and Resources Technology, University of South China,Hengyang,Hunan,421001,China and State Key Laboratory of Pollution Control and Resource Reuse,Tongji University, Shanghai 200092,China;College of Environmental Science and Engineering,Tongji University, Shanghai 200092,China;School of Resource & Environment and Safety Engineering,University of South China,Hengyang,Hunan 421001,China |
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| Abstract: | Enrichment of uranium from radioactive wastewater is of great significance for environmental protection and uranium reuse.Results in this paper indicate that nanoscale zero-valent iron (nZVI) is a cost-effective candidate to separate uranium from aqueous solution.After reactions with uranium,the maximum separation capacity of uranium is 920.16 mg/g and the aqueous uranium concentration is lower than the drinking water standard of USEPA (0.03 mg/L).Weak acidic condition (pH 4~6) favors nZVI to remove uranium,and the efficiencies for uranium separation and reduction increase as nZVI dose increases or concentrations of bicarbonate decreases.In the nZVI slurry,uranium ions form hydrolyze precipitates (UO3·2H2O) at high uranium concentration,however,reduction of uranium with Fe0 and/or Fe2+ is the key role for nZVI to immobilize uranium.Furthermore,uranium and other co-existed metal contaminants could be removed from uranium tailings wastewater by nZVI simultaneously. |
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| Keywords: | uranium nanoscale zero-valent iron enrichment reduction wastewater |
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