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Wei X, Pan D, Tan Q, Shi X, Hou J, Tang Q, Xu Z, Wu W, Ma B. Surface charge property governing co-transport of illite colloids and Eu(III) in saturated porous media. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Sun Y, Liu Z, Tang R, Lee CP, Wang Z, Luo M, Hua R, Jiang Q, Su X. Investigating diffusion mechanism for HTO and Se(IV)/Se(VI) in compacted Tamusu clay rock with different column lengths. RADIOCHIM ACTA 2022. [DOI: 10.1515/ract-2022-0070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Due to continuous self-sealing and good mechanical properties, the Tamusu clay rock of Inner Mongolia has been identified as the pre-selected site for high-level radioactive waste geological disposal site in China. The study of chemical behaviors related to Tamusu clay rock, such as nuclide migration, will be an important content of the performance assessment and safety assessment of the disposal repository in the future. The diffusion behavior of HTO and Se(IV)/Se(VI) with different compacted column lengths in Tamusu clay rock is discussed by the through-diffusion method. The diffusion coefficient, rock capacity factor, effective porosity, and other diffusion parameters closely related to nuclide migration are calculated, and the mechanism of nuclide diffusion is preliminarily discussed. The results show that D
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(6.23 × 10−11∼17.96 × 10−11 m2 s−1), D
e
(1.62 × 10−11∼4.67 × 10−11 m2 s−1) for HTO increase with the increase of the compacted column length, and it is proposed that the diffusion process of HTO is affected by the change of geometrical factor and path tortuosity. D
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(7.29 × 10−13∼1.74 × 10−13 m2 s−1), D
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(5.15 × 10−12∼2.15 × 10−12 m2 s−1) for Se(IV), D
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(3.11 × 10−12∼1.09 × 10−12 m2 s−1), D
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(2.53 × 10−12∼1.09 × 10−12 m2 s−1) for Se(VI), which decrease with the increase of the compacted column length, it is mainly due to the existence of anion repulsion effect.
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Affiliation(s)
- Yuzhen Sun
- State Key Laboratory of Nuclear Resources and Environment , East China University of Technology , Nanchang 330013 , Jiangxi , China
- Jiangxi College of Traditional Chinese Medicine , Fuzhou 344000 , Jiangxi , China
| | - Zhenxing Liu
- School of Geosciences, East China University of Technology , Nanchang 330013 , Jiangxi , China
| | - Rongjing Tang
- College of Nuclear Science and Engineering, East China University of Technology , Nanchang 330013 , Jiangxi , China
| | - Chuan-Pin Lee
- College of Nuclear Science and Engineering, East China University of Technology , Nanchang 330013 , Jiangxi , China
| | - Zhifen Wang
- College of Nuclear Science and Engineering, East China University of Technology , Nanchang 330013 , Jiangxi , China
| | - Mingbiao Luo
- State Key Laboratory of Nuclear Resources and Environment , East China University of Technology , Nanchang 330013 , Jiangxi , China
| | - Rong Hua
- College of Nuclear Science and Engineering, East China University of Technology , Nanchang 330013 , Jiangxi , China
| | - Qifeng Jiang
- College of Nuclear Science and Engineering, East China University of Technology , Nanchang 330013 , Jiangxi , China
| | - Xuebin Su
- Beijing Research Institute of Chemical Engineering and Metallurgy , Beijing 101149 , China
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