Preconcentration of Uranium(VI) from Aqueous Solution by Amidoxime-Functionalized Microspheres Silica Material_Kinetics, Isotherm and Mechanism Study

doi:10.1002/slct.201802472

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 盐湖资源综合利用工程技术中心

	Preconcentration of Uranium(VI) from Aqueous Solution by Amidoxime-Functionalized Microspheres Silica Material_Kinetics, Isotherm and Mechanism Study
	Xiao, Jiang; Jing, Yan; Wang, Xingquan; Yao, Ying; Jia, Yongzhong
刊名	CHEMISTRYSELECT
	2018-11-23
卷号	3 期号:43 页码:12346-12356
ISSN号	2365-6549
DOI	10.1002/slct.201802472
英文摘要	In present study, amidoxime-functionalized MCM-41 microspheres silica materials (denoted as MCM-41-AO) were synthesized and applied to enrich uranium from aqueous mediums. The adsorbents were characterized in detail by SEM, TEM, EDS, FT-IR, elemental analysis and the zero point of change (pHzpc) test. The effects of the pH, ionic strength, contact time, coexisting cations and temperature on the adsorption properties of U(VI) were investigated. The highest sorption capacity of U(VI) on MCM-41-AO was evaluated to be 384.59 mgg(-1) by Langmuir isotherms model at pH=5.00 +/- 0.05 and T=298 +/- 2 K. The adsorption thermodynamics and thermodynamic studies suggest that the U(VI) adsorbed on the amidoxime functionalized microspheres silicas is a chemisorption, spontaneous and endothermic process. In addition, the adsorption mechanism for U(VI) on MCM-41-AO also has been explored by the XPS and FT-IR. The results manifest that the effective adsorption U(VI) is mainly ascribed to the steady formation of surface complexes between uranium ions and the amidoxime ligands.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34455]
专题	青海盐湖研究所_盐湖资源综合利用工程技术中心
推荐引用方式 GB/T 7714	Xiao, Jiang,Jing, Yan,Wang, Xingquan,et al. Preconcentration of Uranium(VI) from Aqueous Solution by Amidoxime-Functionalized Microspheres Silica Material_Kinetics, Isotherm and Mechanism Study[J]. CHEMISTRYSELECT,2018,3(43):12346-12356.
APA	Xiao, Jiang,Jing, Yan,Wang, Xingquan,Yao, Ying,&Jia, Yongzhong.(2018).Preconcentration of Uranium(VI) from Aqueous Solution by Amidoxime-Functionalized Microspheres Silica Material_Kinetics, Isotherm and Mechanism Study.CHEMISTRYSELECT,3(43),12346-12356.
MLA	Xiao, Jiang,et al."Preconcentration of Uranium(VI) from Aqueous Solution by Amidoxime-Functionalized Microspheres Silica Material_Kinetics, Isotherm and Mechanism Study".CHEMISTRYSELECT 3.43(2018):12346-12356.