Sorption mechanism of Th(IV) at iron oxyhydroxide (IOHO)/water interface: Batch, model and spectroscopic studies

doi:10.1016/j.molliq.2017.06.048

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 兰州油气中心

	Sorption mechanism of Th(IV) at iron oxyhydroxide (IOHO)/water interface: Batch, model and spectroscopic studies
	Li, Ping 1; Ma, Xiangxian 1; Li, Hong 1; Li, Shicheng 2; Wu, Hanyu 1; Xu, Di 3; Zheng, Guodong 1; Fan, Qiaohui 1
刊名	JOURNAL OF MOLECULAR LIQUIDS
	2017-09-01
卷号	241 页码:478-485
关键词	Sorption Iron oxyhydroxide Th(IV) Surface complexation model Mossbauer spectroscopy XPS
ISSN号	0167-7322
DOI	10.1016/j.molliq.2017.06.048
文献子类	Article
英文摘要	In this study, sorption mechanism of Th(IV) at iron oxyhydroxide (IOHO)/water interface was studied under ambient conditions to explore the retardation effects of IOHO on actinides in the engineering barrier system of the high-level radioactive waste geological repository. The sorption of Th(IV) on IOHO was strongly dependent on pH, and the intra-particle diffusion was the rate-controlling step. The presence of humic acid can enhance the sorption of Th(IV) on IOHO below pH similar to 3.5, while slightly inhibit Th(IV) sorption above pH 3.5 due to the competing effect of humic acid remaining in aqueous phase. The surface complexation model (SCM) confirmed that the bi-dentate complex of ( FeO)(2)Th2+ and mono-dentate complexes of FeOThOH2+, and. FeOTh(OH)(3)(0) are controlling the sorption process of Th(IV) on IOHO. Th(IV) sorption on IOHO is favorable to high temperature with respect to the hydrolysis effect of Th(IV). XPS analysis also confirmed the above mono and bi-dentate surface complexes of Th(IV) on IOHO, which are very sensitive to environmental conditions. Mossbauer spectroscopy showed a decreasing geometry of each components of IOHO after Th(IV) sorption, indicating the chemisorption of Th(IV) on IOHO. Moreover, the contributions from Fe3O4(A) and Fe3O4(B) components to Th(IV) sorption were higher under high temperature and initial Th(IV) concentration in comparison with alpha-FeOOH and amorphous Fe(3)O4 components. The mono-dentate FeO-ThOH2+ and FeO-Th(OH)(2+) complexes formed at Fe3O4(A) and Fe3OO4(B) surfaces, whereas the bi-dentate ( FeO)(2)-Th2+ complex was preferring forming at the surface of alpha-FeOOH and amorphous Fe3O4. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词	NATURAL ORGANIC-MATTER ; IONIC-STRENGTH ; HUMIC SUBSTANCES ; AQUEOUS-SOLUTION ; GRAPHENE OXIDES ; CONTACT TIME ; FULVIC-ACID ; ADSORPTION ; EU(III) ; PH
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000407535000056
资助机构	National Natural Science Foundation of China(21601169 ; "100-Talent" program from Chinese Academy of Science in Lanzhou Center for Oil Gas Resources ; Institute of Geology and Geophysics, CAS "Light of West China" Program ; Key Laboratory of Special Function Materials and Structure Design, Ministry of Education ; 41573128 ; 21601179) ; National Natural Science Foundation of China(21601169 ; "100-Talent" program from Chinese Academy of Science in Lanzhou Center for Oil Gas Resources ; Institute of Geology and Geophysics, CAS "Light of West China" Program ; Key Laboratory of Special Function Materials and Structure Design, Ministry of Education ; 41573128 ; 21601179) ; National Natural Science Foundation of China(21601169 ; "100-Talent" program from Chinese Academy of Science in Lanzhou Center for Oil Gas Resources ; Institute of Geology and Geophysics, CAS "Light of West China" Program ; Key Laboratory of Special Function Materials and Structure Design, Ministry of Education ; 41573128 ; 21601179) ; National Natural Science Foundation of China(21601169 ; "100-Talent" program from Chinese Academy of Science in Lanzhou Center for Oil Gas Resources ; Institute of Geology and Geophysics, CAS "Light of West China" Program ; Key Laboratory of Special Function Materials and Structure Design, Ministry of Education ; 41573128 ; 21601179)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/61912]
专题	地质与地球物理研究所_兰州油气中心
通讯作者	Fan, Qiaohui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resource Res, Key Lab Petr Resource Res, Lanzhou 730000, Gansu, Peoples R China 2.China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, Ping,Ma, Xiangxian,Li, Hong,et al. Sorption mechanism of Th(IV) at iron oxyhydroxide (IOHO)/water interface: Batch, model and spectroscopic studies[J]. JOURNAL OF MOLECULAR LIQUIDS,2017,241:478-485.
APA	Li, Ping.,Ma, Xiangxian.,Li, Hong.,Li, Shicheng.,Wu, Hanyu.,...&Fan, Qiaohui.(2017).Sorption mechanism of Th(IV) at iron oxyhydroxide (IOHO)/water interface: Batch, model and spectroscopic studies.JOURNAL OF MOLECULAR LIQUIDS,241,478-485.
MLA	Li, Ping,et al."Sorption mechanism of Th(IV) at iron oxyhydroxide (IOHO)/water interface: Batch, model and spectroscopic studies".JOURNAL OF MOLECULAR LIQUIDS 241(2017):478-485.