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Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix

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Standard Standard

Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix. / Kearney, Sarah; Robshaw, Thomas; Turner, Joshua et al.
In: MRS Advances, Vol. 7, 01.03.2022, p. 105-109.

Research output: Contribution to journal › Article › peer-review

HarvardHarvard

Kearney, S, Robshaw, T, Turner, J, Sharrad, C, Walkley, B & Ogden, M 2022, 'Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix', MRS Advances, vol. 7, pp. 105-109. https://doi.org/10.1557/s43580-022-00207-4

APA

Kearney, S., Robshaw, T., Turner, J., Sharrad, C., Walkley, B., & Ogden, M. (2022). Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix. MRS Advances, 7, 105-109. https://doi.org/10.1557/s43580-022-00207-4

CBE

Kearney S, Robshaw T, Turner J, Sharrad C, Walkley B, Ogden M. 2022. Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix. MRS Advances. 7:105-109. https://doi.org/10.1557/s43580-022-00207-4

MLA

Kearney, Sarah et al. "Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix". MRS Advances. 2022, 7. 105-109. https://doi.org/10.1557/s43580-022-00207-4

VancouverVancouver

Kearney S, Robshaw T, Turner J, Sharrad C, Walkley B, Ogden M. Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix. MRS Advances. 2022 Mar 1;7:105-109. Epub 2022 Feb 9. doi: 10.1557/s43580-022-00207-4

Author

Kearney, Sarah ; Robshaw, Thomas ; Turner, Joshua et al. / Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix. In: MRS Advances. 2022 ; Vol. 7. pp. 105-109.

RIS

TY - JOUR

T1 - Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrix

AU - Kearney, Sarah

AU - Robshaw, Thomas

AU - Turner, Joshua

AU - Sharrad, Clint

AU - Walkley, Brant

AU - Ogden, Mark

PY - 2022/3/1

Y1 - 2022/3/1

N2 - The development of a wasteform for the disposal of I-129 would enable a change in waste management of iodine from recycling of nuclear fuel. Initial results investigating the encapsulation of iodide-loaded metallated silica sorbents into a geopolymer matrix are presented. Two silica materials, with a mercapto and a thiourea functionality, were found in scoping trials to have modest iodide loading capacities [72.9 ± 5 mg(I)/g, 119.5 ± 5 g(I)/g]]. Loaded sorbents were encapsulated in a geopolymer (GP) matrix at a conservative 2 wt% loading of capture material to test whether a wasteform could be created. A Blast Furnace Slag:Portland Cement (BFS:PC) cement was created as a benchmark reference. Successful formation of both BFS:PC and GP wasteforms was achieved, but the silica matrix in the GP samples was found to break down due to the high pH (~ 14) of the fresh geopolymer paste. Bleed water from one of the GP samples was analysed showing formation of Ag2S.

AB - The development of a wasteform for the disposal of I-129 would enable a change in waste management of iodine from recycling of nuclear fuel. Initial results investigating the encapsulation of iodide-loaded metallated silica sorbents into a geopolymer matrix are presented. Two silica materials, with a mercapto and a thiourea functionality, were found in scoping trials to have modest iodide loading capacities [72.9 ± 5 mg(I)/g, 119.5 ± 5 g(I)/g]]. Loaded sorbents were encapsulated in a geopolymer (GP) matrix at a conservative 2 wt% loading of capture material to test whether a wasteform could be created. A Blast Furnace Slag:Portland Cement (BFS:PC) cement was created as a benchmark reference. Successful formation of both BFS:PC and GP wasteforms was achieved, but the silica matrix in the GP samples was found to break down due to the high pH (~ 14) of the fresh geopolymer paste. Bleed water from one of the GP samples was analysed showing formation of Ag2S.

U2 - 10.1557/s43580-022-00207-4

DO - 10.1557/s43580-022-00207-4

M3 - Article

VL - 7

SP - 105

EP - 109

JO - MRS Advances

JF - MRS Advances

SN - 2059-8521

ER -