Characteristic study for the uranium and cesium sorption on bentonite by using XPS and XANES

Wey Tsang Liu; Shih Chin Tsai; Tsuey Lin Tsai; Chuan Pin Lee; Chih Hao Lee

doi:10.1007/s10967-017-5584-4

Characteristic study for the uranium and cesium sorption on bentonite by using XPS and XANES

Wey Tsang Liu, Shih Chin Tsai, Tsuey Lin Tsai, Chuan Pin Lee, Chih Hao Lee

Department of Earth Sciences

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16 Citations (Scopus)

Abstract

X-ray photoelectron spectroscopy (XPS) and synchrotron X-ray techniques of absorption near edge structure (XANES) were used to probe the coordination numbers and chemical states of absorption atoms to characterize the retention processes of uranium and cesium transportation in bentonite. The results of XPS showed that minor Van der Waals force interaction near the surface of bentonite were found while cesium adsorbed onto bentonite. The result of XANES showed that the uranium valence state greater than 6, and the cesium valence state also find greater than 1. The uranium valence state of mixture of bentonite and UO₂(NO₃)₂·6H₂O solvent is greater than 6. It maybe due to the strong electron negativity of NO₃ ⁻. From the results of added CsNO₃ to bentonite also find the cesium valence state greater than 1. Checking the atom valence state may be able to identify nuclide migration mechanism, which is fundamental information to estimate nuclide migration to biosphere in natural environments.

Original language	English
Pages (from-to)	2237-2241
Number of pages	5
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume	314
Issue number	3
DOIs	https://doi.org/10.1007/s10967-017-5584-4
Publication status	Published - 2017 Dec 1

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Nuclear Energy and Engineering
Radiology Nuclear Medicine and imaging
Pollution
Spectroscopy
Public Health, Environmental and Occupational Health
Health, Toxicology and Mutagenesis

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10.1007/s10967-017-5584-4

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title = "Characteristic study for the uranium and cesium sorption on bentonite by using XPS and XANES",

abstract = "X-ray photoelectron spectroscopy (XPS) and synchrotron X-ray techniques of absorption near edge structure (XANES) were used to probe the coordination numbers and chemical states of absorption atoms to characterize the retention processes of uranium and cesium transportation in bentonite. The results of XPS showed that minor Van der Waals force interaction near the surface of bentonite were found while cesium adsorbed onto bentonite. The result of XANES showed that the uranium valence state greater than 6, and the cesium valence state also find greater than 1. The uranium valence state of mixture of bentonite and UO2(NO3)2·6H2O solvent is greater than 6. It maybe due to the strong electron negativity of NO3 −. From the results of added CsNO3 to bentonite also find the cesium valence state greater than 1. Checking the atom valence state may be able to identify nuclide migration mechanism, which is fundamental information to estimate nuclide migration to biosphere in natural environments.",

author = "Liu, {Wey Tsang} and Tsai, {Shih Chin} and Tsai, {Tsuey Lin} and Lee, {Chuan Pin} and Lee, {Chih Hao}",

note = "Funding Information: Acknowledgements We are grateful to the 07A and 16A beamline at National Synchrotron Radiation Research Center (Taiwan) for providing beam time and assistance during the XANES measurements. The experimental section of this study was supported by the Ministry of Science and Technology (MOST, Taiwan) under contract numbers 105-2623-E-007-006-NU and 105-2623-E-007-007 -NU and the Atomic Energy Council (AEC, Taiwan). Publisher Copyright: {\textcopyright} 2017, Akad{\'e}miai Kiad{\'o}, Budapest, Hungary.",

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AU - Lee, Chih Hao

N1 - Funding Information: Acknowledgements We are grateful to the 07A and 16A beamline at National Synchrotron Radiation Research Center (Taiwan) for providing beam time and assistance during the XANES measurements. The experimental section of this study was supported by the Ministry of Science and Technology (MOST, Taiwan) under contract numbers 105-2623-E-007-006-NU and 105-2623-E-007-007 -NU and the Atomic Energy Council (AEC, Taiwan). Publisher Copyright: © 2017, Akadémiai Kiadó, Budapest, Hungary.

PY - 2017/12/1

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N2 - X-ray photoelectron spectroscopy (XPS) and synchrotron X-ray techniques of absorption near edge structure (XANES) were used to probe the coordination numbers and chemical states of absorption atoms to characterize the retention processes of uranium and cesium transportation in bentonite. The results of XPS showed that minor Van der Waals force interaction near the surface of bentonite were found while cesium adsorbed onto bentonite. The result of XANES showed that the uranium valence state greater than 6, and the cesium valence state also find greater than 1. The uranium valence state of mixture of bentonite and UO2(NO3)2·6H2O solvent is greater than 6. It maybe due to the strong electron negativity of NO3 −. From the results of added CsNO3 to bentonite also find the cesium valence state greater than 1. Checking the atom valence state may be able to identify nuclide migration mechanism, which is fundamental information to estimate nuclide migration to biosphere in natural environments.

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Characteristic study for the uranium and cesium sorption on bentonite by using XPS and XANES

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