The physical chemistry of uranium (VI) immobilization on manganese oxides
文献类型：期刊论文
| 作者 | Ren, YM; Bao, HL; Wu, Q; Wang, HS; Gai, T; Shao, L; Wang, SF; Tang, H; Li, YR; Wang, XK |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2020 |
| 卷号 | 391页码:- |
| 关键词 | RAY-ABSORPTION SPECTROSCOPY HYDROTHERMAL SYNTHESIS IN-SITU ADSORPTION BEHAVIOR URANYL SORPTION REMOVAL WATER COMPLEXATION MECHANISM GRAPHENE |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2020.122207 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Manganese oxides show strong affinity towards uranium, and have a promising application in uranium immobilization in environmental protection. We successfully synthesized a series of Mn oxide materials of different structures and investigated their U(VI) immobilization performances. The results showed that all Mn oxides share similar sorption capacities per unit surface area, implying similar physical chemistry during immobilization. Among these Mn oxides, alpha-MnO2 shows the most outstanding performance for uranium uptake (280 mg/g). More detailed studies on interfacial properties of U(VI) on alpha-MnO2 were performed to elucidate the binding mechanism. The uptake was largely influenced by acidity, but less impacted by ionic strength, indicative of an inner-sphere binding mode. The selectivity for uranium is much higher than other selected metal ions, i.e. Co2+, Ni2+, Eu3+, etc. ATR-FTIR, and EXAFS results showed that in both mild acidic and neutral conditions, U (VI) formed bidentate binuclear structure on alpha-MnO2, as evidenced by v as (0 = U = 0) at 912 cm(-1) and the number of Mn in U coordination shell. UO2(OH)(2) precipitate was found at the molecular level in neutral condition (pH 7-8). The results reveal the physical chemistry in uranium immobilization process on manganese oxide surfaces and helps to better understand the uranium environmental migration. Furthermore, it provides an alternative approach for radioactive water purification. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33197]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.China Acad Engn Phys, Inst Mat, POB 9071-11, Mianyang, Sichuan, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, 2019 JiaLuo Rd, Shanghai 201800, Peoples R China 3.North China Elect Power Univ, Sch Environm & Chem Engn, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ren, YM,Bao, HL,Wu, Q,et al. The physical chemistry of uranium (VI) immobilization on manganese oxides[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,391:-. |
| APA | Ren, YM.,Bao, HL.,Wu, Q.,Wang, HS.,Gai, T.,...&Wang, XK.(2020).The physical chemistry of uranium (VI) immobilization on manganese oxides.JOURNAL OF HAZARDOUS MATERIALS,391,-. |
| MLA | Ren, YM,et al."The physical chemistry of uranium (VI) immobilization on manganese oxides".JOURNAL OF HAZARDOUS MATERIALS 391(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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