Diffusive processes in aqueous glass dissolution
Diffusive processes in aqueous glass dissolution
复制标题
水玻璃溶解中的扩散过程
DOI:
10.1038/s41529-019-0102-5
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发表时间:
2019
影响因子:
5.1
通讯作者:
Goût T
中科院分区:
文献类型:
--
作者:
Goût T
High level nuclear waste is often immobilised in a borosilicate glass for disposal. However, this glass corrodes in contact with aqueous solutions. To predict radionuclide releases from wasteforms, their dissolution mechanisms must be understood. Understanding glass dissolution mechanisms presents a challenge across numerous other disciplines and many glass dissolution models still remain conflicted. Here we show that diffusion was a significant process during the later stages of dissolution of a simplified waste glass but was not evidenced during the initial stages of dissolution. The absence of measurable isotopic fractionation in solution initially supports models of congruent dissolution. However, the solution becoming isotopically lighter at later times evidences diffusive isotopic fractionation and opposes models that exclude diffusive transport as a significant mechanism. The periodically sampled isotopic methodologies outlined here provide an additional dimension with which to understand glass dissolution mechanisms beyond the usual measurement of solution concentrations and, post-process, nano-scale analysis of the altered glass.
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影响因子:
5
作者:
R. Hindshaw;Rebecca Tosca;Thomas L. Goût;I. Farnan;N. Tosca;E. Tipper
通讯作者:
R. Hindshaw;Rebecca Tosca;Thomas L. Goût;I. Farnan;N. Tosca;E. Tipper
影响因子:
5
作者:
Geisler, Thorsten;Nagel, Thorsten;Nemchin, Alexander A.
通讯作者:
Nemchin, Alexander A.
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
R. Doremus
通讯作者:
R. Doremus
影响因子:
3.5
作者:
Rui Guo;C. Brigden;S. Gin;S. Swanton;I. Farnan
通讯作者:
Rui Guo;C. Brigden;S. Gin;S. Swanton;I. Farnan
影响因子:
3.5
作者:
DOREMUS, RH
通讯作者:
DOREMUS, RH