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Efficient removal of uranium from aqueous solution by zero-valent iron nanoparticle and its graphene composite
Li ZJ(李子杰); Wang L(王琳); Yuan LY(袁立永); Mei L(梅雷); Zheng LR(郑黎荣); Zhang J(张静); Yang JH(杨巨华); Zhao YL(赵宇亮); Chai ZF(柴之芳); Shi WQ(石伟群); Li, ZJ; Wang, L; Yuan, LY; Xiao, CL; Mei, L; Zheng, LR; Zhang, J; Yang, JH; Zhao, YL; Zhu, ZT; Chai, ZF; Shi, WQ
2015
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
EISSN1873-3336
Volume290Pages:26-33
Corresponding Author石伟群
SubtypeArticle
AbstractZero-valent iron nanoparticle (ZVI-np) and its graphene composites were prepared and applied in the removal of uranium under anoxic conditions. It was found that solutions containing 24 ppm U(VI) could be completely cleaned up by ZVI-nps, regardless of the presence of NaHCO3, humic acid, mimic groundwater constituents or the change of solution pH from 5 to 9, manifesting the promising potential of this reactive material in permeable reactive barrier (PRB) to remediate uranium-contaminated groundwater. In the measurement of maximum sorption capacity, removal efficiency of uranium kept at 100% until C-0(U) = 643 ppm, and the saturation sorption of 8173 mg U/g ZVI-nps was achieved at C-0(U) = 714 ppm. In addition, reaction mechanisms were clarified based on the results of SEM, XRD, XANES, and chemical leaching in (NH4)(2)CO3 solution. Partially reductive precipitation of U(VI) as U3O7 was prevalent when sufficient iron was available; nevertheless, hydrolysis precipitation of U(VI) on surface would be predominant as iron got insufficient, characterized by releases of Fe2+ ions. The dissolution of Fe-0 cores was assigned to be the driving force of continuous formation of U(VI) (hydr)oxide. The incorporation of graphene supporting matrix was found to facilitate faster removal rate and higher U(VI) reduction ratio, thus benefitting the long-term immobilization of uranium in geochemical environment. (C) 2015 Elsevier B.V. All rights reserved.
KeywordZero-valent iron nanoparticles Graphene composites Uranium removal Reductive precipitation Hydrolysis precipitation
Subject AreaEngineering; Environmental Sciences & Ecology
DOI10.1016/j.jhazmat.2015.02.028
Indexed BySCI ; EI ; CA
Language英语
WOS Research AreaEngineering, Environmental ; Environmental Sciences
WOS SubjectEngineering ; Environmental Sciences & Ecology
WOS IDWOS:000353097000004
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/228322
Collection院士
多学科研究中心
Recommended Citation
GB/T 7714
Li ZJ,Wang L,Yuan LY,et al. Efficient removal of uranium from aqueous solution by zero-valent iron nanoparticle and its graphene composite[J]. JOURNAL OF HAZARDOUS MATERIALS,2015,290:26-33.
APA 李子杰.,王琳.,袁立永.,梅雷.,郑黎荣.,...&Shi, WQ.(2015).Efficient removal of uranium from aqueous solution by zero-valent iron nanoparticle and its graphene composite.JOURNAL OF HAZARDOUS MATERIALS,290,26-33.
MLA 李子杰,et al."Efficient removal of uranium from aqueous solution by zero-valent iron nanoparticle and its graphene composite".JOURNAL OF HAZARDOUS MATERIALS 290(2015):26-33.
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