Abstract
The diffusion of Re(VII), Se(IV) and Cr(VI) in compacted Gaomiaozi bentonite was conducted by an integrated diffusion setup. The effective diffusion coefficient and the rock capacity factor of Re(VII), Se(IV) and Cr(VI) were measured. Re(VII) and Cr(VI) were excluded from the surface of bentonite particles with an accessible porosity of 0.40 and 0.23. The geometric factor decreased in a sequence of Cr(VI) < Se(IV) < Re(VII), indicating that Cr(IV) had a lower tortuosity, a larger diffusion pore diameter, and a stronger anionic exclusion effect from the surface of bentonite platelets.
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This work was financially supported by Huzhou science and technology planning project (2021GZ60) Special, Special Branch project of South Taihu Lake and Huzhou Key Laboratory of Environmental Functional Materials and Pollution Control.
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Wu, T., Geng, Z., Feng, Z. et al. Diffusion of Re(VII), Se(IV) and Cr(VI) in compacted GMZ bentonite. J Radioanal Nucl Chem 331, 2311–2317 (2022). https://doi.org/10.1007/s10967-022-08278-1
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DOI: https://doi.org/10.1007/s10967-022-08278-1