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Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes

Marcos F. Martinez-Moreno Orcid Logo, Cristina Povedano-Priego Orcid Logo, Mar Morales-Hidalgo, Adam Mumford, Jesus Ojeda Ledo Orcid Logo, Fadwa Jroundi, Mohamed L. Merroun Orcid Logo

Journal of Hazardous Materials, Volume: 458, Start page: 131940

Swansea University Authors: Adam Mumford, Jesus Ojeda Ledo Orcid Logo

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DOI (Published version): 10.1016/j.jhazmat.2023.131940

Abstract

The Deep Geological Repository (DGR) is the preferred option for the final disposal of high-level radioactive waste. Microorganisms could affect the safety of the DGR by altering the mineralogical properties of the compacted bentonite or inducing the corrosion of the metal canisters. In this work, t...

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Published in: Journal of Hazardous Materials
ISSN: 0304-3894 1873-3336
Published: Elsevier BV 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa63710
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spelling 2024-10-09T10:15:42.6200474 v2 63710 2023-06-26 Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes 950f680b2dfca0e78d8dd229be5babd7 Adam Mumford Adam Mumford true false 4c1c9800dffa623353dff0ab1271be64 0000-0002-2046-1010 Jesus Ojeda Ledo Jesus Ojeda Ledo true false 2023-06-26 The Deep Geological Repository (DGR) is the preferred option for the final disposal of high-level radioactive waste. Microorganisms could affect the safety of the DGR by altering the mineralogical properties of the compacted bentonite or inducing the corrosion of the metal canisters. In this work, the impact of physicochemical parameters (bentonite dry density, heat shock, electron donors/acceptors) on the microbial activity, stability of compacted bentonite and corrosion of copper (Cu) discs was investigated after one-year anoxic incubation at 30 ºC. No-illitization in the bentonite was detected confirming its structural stability over 1 year under the experimental conditions. The microbial diversity analysis based on 16S rRNA Next Generation Sequencing showed slight changes between the treatments with an increase of aerobic bacteria belonging to Micrococcaceae and Nocardioides in heat-shock tyndallized bentonites. The survival of sulfate-reducing bacteria (the main source of Cu anoxic corrosion) was demonstrated by the most probable number method. The detection of CuxS precipitates on the surface of Cu metal in the bentonite/Cu metal samples amended with acetate/lactate and sulfate, indicate an early stage of Cu corrosion. Altogether, the outputs of this study help to better understand the predominant biogeochemical processes at the bentonite/Cu canister interface upon DGR closure. Journal Article Journal of Hazardous Materials 458 131940 Elsevier BV 0304-3894 1873-3336 DGR; compacted bentonite; microbial diversity; sulfate-reducing bacteria; copper corrosion 15 9 2023 2023-09-15 10.1016/j.jhazmat.2023.131940 COLLEGE NANME COLLEGE CODE Swansea University Another institution paid the OA fee The present work was supported by grant RTI2018-101548-B-I00 from MCIN/AEI/10.13039/501100011033 “ERDF A way of making Europe” to MLM from the “Ministerio de Ciencia, Innovación y Universidades” (Spanish Government) and JJO/ADM acknowledge funding from the UK Engineering and Physical Sciences Research Council (EPSRC) DTP, project reference: 2748843. EPSRC project reference: 2748843. Grant RTI2018-101548-B-I00 from MCIN/AEI/10.13039/501100011033 “ERDF A way of making Europe” from the “Ministerio de Ciencia, Innovación y Universidades” (Spanish Government). 2024-10-09T10:15:42.6200474 2023-06-26T15:10:29.6392250 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Marcos F. Martinez-Moreno 0000-0002-6808-1922 1 Cristina Povedano-Priego 0000-0001-9859-7666 2 Mar Morales-Hidalgo 3 Adam Mumford 4 Jesus Ojeda Ledo 0000-0002-2046-1010 5 Fadwa Jroundi 6 Mohamed L. Merroun 0000-0003-4553-5976 7 63710__32554__ae869e1f04be4f34ae26bd96fd790f1d.pdf 1-s2.0-S0304389423012232-main VoR.pdf 2024-10-08T19:19:24.7222706 Output 10988636 application/pdf Version of Record true © 2024 The Authors. This is an open access article under the CC BY license. true eng http://creativecommons.org/licenses/by/4.0/
title Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes
spellingShingle Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes
Adam Mumford
Jesus Ojeda Ledo
title_short Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes
title_full Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes
title_fullStr Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes
title_full_unstemmed Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes
title_sort Impact of compacted bentonite microbial community on the clay mineralogy and copper canister corrosion: a multidisciplinary approach in view of a safe Deep Geological Repository of nuclear wastes
author_id_str_mv 950f680b2dfca0e78d8dd229be5babd7
4c1c9800dffa623353dff0ab1271be64
author_id_fullname_str_mv 950f680b2dfca0e78d8dd229be5babd7_***_Adam Mumford
4c1c9800dffa623353dff0ab1271be64_***_Jesus Ojeda Ledo
author Adam Mumford
Jesus Ojeda Ledo
author2 Marcos F. Martinez-Moreno
Cristina Povedano-Priego
Mar Morales-Hidalgo
Adam Mumford
Jesus Ojeda Ledo
Fadwa Jroundi
Mohamed L. Merroun
format Journal article
container_title Journal of Hazardous Materials
container_volume 458
container_start_page 131940
publishDate 2023
institution Swansea University
issn 0304-3894
1873-3336
doi_str_mv 10.1016/j.jhazmat.2023.131940
publisher Elsevier BV
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description The Deep Geological Repository (DGR) is the preferred option for the final disposal of high-level radioactive waste. Microorganisms could affect the safety of the DGR by altering the mineralogical properties of the compacted bentonite or inducing the corrosion of the metal canisters. In this work, the impact of physicochemical parameters (bentonite dry density, heat shock, electron donors/acceptors) on the microbial activity, stability of compacted bentonite and corrosion of copper (Cu) discs was investigated after one-year anoxic incubation at 30 ºC. No-illitization in the bentonite was detected confirming its structural stability over 1 year under the experimental conditions. The microbial diversity analysis based on 16S rRNA Next Generation Sequencing showed slight changes between the treatments with an increase of aerobic bacteria belonging to Micrococcaceae and Nocardioides in heat-shock tyndallized bentonites. The survival of sulfate-reducing bacteria (the main source of Cu anoxic corrosion) was demonstrated by the most probable number method. The detection of CuxS precipitates on the surface of Cu metal in the bentonite/Cu metal samples amended with acetate/lactate and sulfate, indicate an early stage of Cu corrosion. Altogether, the outputs of this study help to better understand the predominant biogeochemical processes at the bentonite/Cu canister interface upon DGR closure.
published_date 2023-09-15T14:31:36Z
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