Macroscopic and Microscopic Investigation of U(VI) and Eu(III) Adsorption on Carbonaceous Nanofibers

doi:10.1021/acs.est.6b00058

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院等离子体物理研究所

	Macroscopic and Microscopic Investigation of U(VI) and Eu(III) Adsorption on Carbonaceous Nanofibers
	Sun, Yubing 1,2,4,5; Wu, Zhen-Yu 3; Wang, Xiangxue 1,2; Ding, Congcong 2; Cheng, Wencai 2; Yu, Shu-Hong 3; Wang, Xiangke 1,2,4,5,6
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2016-04-19
卷号	50 期号:8 页码:4459-4467
DOI	10.1021/acs.est.6b00058
文献子类	Article
英文摘要	The adsorption mechanism of U(VI) and Eu(III) on carbonaceous nanofibers (CNFs) was investigated using batch, IR, XPS, XANES, and EXAFS techniques. The pH-dependent adsorption indicated that the adsorption of U(VI) on the CNFs was significantly higher than the adsorption of Eu(III) at pH < 7.0. The maximum adsorption capacity of the CNFs calculated from the Langmuir model at pH 4.5 and 298 K for U(VI) and Eu(III) were 125 and 91 mg/g, respectively. The CNFs displayed good recyclability and recoverability by regeneration experiments. Based on XPS and XANES analyses, the enrichment of U(VI) and Eu(III) was attributed to the abundant adsorption sites (e.g., OH and COOH groups) of the CNFs. IR analysis further demonstrated that COOH groups were more responsible for U(VI) adsorption. In addition, the remarkable reducing agents of the R-CH2-OH groups were responsible for the highly efficient adsorption of U(VI) on the CNFs. The adsorption mechanism of U(VI) on the CNFs at pH 4.5 was shifted from inner- to outer-sphere surface complexation with increasing initial concentration, whereas the surface (co)precipitate (i.e., schoepite) was observed at pH 7.0 by EXAFS spectra. The findings presented herein play an important sole in the removal of radionuclides on inexpensive and available carbon-based nanoparticles in environmental cleanup applications.
WOS关键词	GRAPHENE OXIDE NANOSHEETS ; HUMIC-ACID ; URANIUM(VI) ADSORPTION ; MODELING TECHNIQUES ; ACTIVATED CARBON ; HIGHLY EFFICIENT ; BACTERIAL-CELLULOSE ; CRYSTAL-STRUCTURE ; AEROGELS ; SORPTION
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000374707100036
资助机构	Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Natural Science Foundation of China(21477133 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 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内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/21812]
专题	合肥物质科学研究院_中科院等离子体物理研究所
作者单位	1.North China Elect Power Univ, Sch Environm & Chem Engn, Beijing 102206, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Key Lab New Thin Film Solar Cells, POB 1126, Hefei 230031, Anhui, Peoples R China 3.Univ Sci & Technol China, Dept Chem, Hefei Natl Lab Phys Sci Microscale, Div Nanomat & Chem, Hefei 230026, Anhui, Peoples R China 4.Soochow Univ, Sch Radiol & Interdisciplinary Sci, Suzhou 215123, Peoples R China 5.Jiangsu Higher Educ Inst, Collaborat Innovat Ctr Radiat Med, Suzhou 215123, Peoples R China 6.King Abdulaziz Univ, Fac Sci, NAAM Res Grp, Jeddah 21589, Saudi Arabia
推荐引用方式 GB/T 7714	Sun, Yubing,Wu, Zhen-Yu,Wang, Xiangxue,et al. Macroscopic and Microscopic Investigation of U(VI) and Eu(III) Adsorption on Carbonaceous Nanofibers[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(8):4459-4467.
APA	Sun, Yubing.,Wu, Zhen-Yu.,Wang, Xiangxue.,Ding, Congcong.,Cheng, Wencai.,...&Wang, Xiangke.(2016).Macroscopic and Microscopic Investigation of U(VI) and Eu(III) Adsorption on Carbonaceous Nanofibers.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(8),4459-4467.
MLA	Sun, Yubing,et al."Macroscopic and Microscopic Investigation of U(VI) and Eu(III) Adsorption on Carbonaceous Nanofibers".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.8(2016):4459-4467.