Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository

Copper and steel canning and bentonite buffer are normally forseen as the primary containment component of a deep nuclear waste repository. Distribution of microbes in subsurface environments have been found to be extensive and directly or indirectly may exert influence on waste canister corrosion a...

Full description

Bibliographic Details
Main Authors:	Mohd Yuhyi, Mohd Tadza, M. A., Mohd Tadza, Bag, Ramakrishna, Harith, N. S. H.
Format:	Conference or Workshop Item
Language:	English
Published:	IOP Publishing 2018
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/22229/ http://umpir.ump.edu.my/id/eprint/22229/ http://umpir.ump.edu.my/id/eprint/22229/1/Potential%20impact%20of%20Andrassy%20bentonite.pdf

id	ump-22229
recordtype	eprints
spelling	ump-222292018-09-26T03:16:52Z http://umpir.ump.edu.my/id/eprint/22229/ Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository Mohd Yuhyi, Mohd Tadza M. A., Mohd Tadza Bag, Ramakrishna Harith, N. S. H. TA Engineering (General). Civil engineering (General) Copper and steel canning and bentonite buffer are normally forseen as the primary containment component of a deep nuclear waste repository. Distribution of microbes in subsurface environments have been found to be extensive and directly or indirectly may exert influence on waste canister corrosion and the mobility of radionuclides. The understanding of clays and microbial interaction with radionuclides will be useful in predicting the microbial impacts on the performance of the waste repositories. The present work characterizes the culture-dependent microbial diversity of Andrassy bentonite recovered from Tawau clay deposits. The evaluation of microbial populations shows the presence of a number of cultivable microbes (e.g. Staphylococcus, Micrococcus, Achromobacter, Bacillus, Paecilomyces, Trichoderma, and Fusarium). Additionally, a pigmented yeast strain Rhodotorula mucilaginosa was also recovered from the formation. Both Bacillus and Rhodotorula mucilaginosa have high tolerance towards U radiation and toxicity. The presence of Rhodotorula mucilaginosa in Andrassy bentonite might be able to change the speciation of radionuclides (e.g. uranium) in a future deep repository. However, concern over the presence of Fe (III) reduction microbes such as Bacillus also found in the formation could lead to corrosion of copper steel canister and affect the overall performance of the containment system. IOP Publishing 2018 Conference or Workshop Item PeerReviewed pdf en cc_by http://umpir.ump.edu.my/id/eprint/22229/1/Potential%20impact%20of%20Andrassy%20bentonite.pdf Mohd Yuhyi, Mohd Tadza and M. A., Mohd Tadza and Bag, Ramakrishna and Harith, N. S. H. (2018) Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository. In: IOP Conference Series: Materials Science and Engineering, International Nuclear Science, Technology and Engineering Conference (iNuSTEC2017), 25-27 September 2017 , Selangor, Malaysia. pp. 1-6., 298 (012009). ISSN 1757-899X https://doi.org/10.1088/1757-899X/298/1/012009
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Mohd Yuhyi, Mohd Tadza M. A., Mohd Tadza Bag, Ramakrishna Harith, N. S. H. Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository
description	Copper and steel canning and bentonite buffer are normally forseen as the primary containment component of a deep nuclear waste repository. Distribution of microbes in subsurface environments have been found to be extensive and directly or indirectly may exert influence on waste canister corrosion and the mobility of radionuclides. The understanding of clays and microbial interaction with radionuclides will be useful in predicting the microbial impacts on the performance of the waste repositories. The present work characterizes the culture-dependent microbial diversity of Andrassy bentonite recovered from Tawau clay deposits. The evaluation of microbial populations shows the presence of a number of cultivable microbes (e.g. Staphylococcus, Micrococcus, Achromobacter, Bacillus, Paecilomyces, Trichoderma, and Fusarium). Additionally, a pigmented yeast strain Rhodotorula mucilaginosa was also recovered from the formation. Both Bacillus and Rhodotorula mucilaginosa have high tolerance towards U radiation and toxicity. The presence of Rhodotorula mucilaginosa in Andrassy bentonite might be able to change the speciation of radionuclides (e.g. uranium) in a future deep repository. However, concern over the presence of Fe (III) reduction microbes such as Bacillus also found in the formation could lead to corrosion of copper steel canister and affect the overall performance of the containment system.
format	Conference or Workshop Item
author	Mohd Yuhyi, Mohd Tadza M. A., Mohd Tadza Bag, Ramakrishna Harith, N. S. H.
author_facet	Mohd Yuhyi, Mohd Tadza M. A., Mohd Tadza Bag, Ramakrishna Harith, N. S. H.
author_sort	Mohd Yuhyi, Mohd Tadza
title	Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository
title_short	Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository
title_full	Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository
title_fullStr	Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository
title_full_unstemmed	Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository
title_sort	potential impact of andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository
publisher	IOP Publishing
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/22229/ http://umpir.ump.edu.my/id/eprint/22229/ http://umpir.ump.edu.my/id/eprint/22229/1/Potential%20impact%20of%20Andrassy%20bentonite.pdf
first_indexed	2023-09-18T22:32:58Z
last_indexed	2023-09-18T22:32:58Z
_version_	1777416408882216960

Potential impact of Andrassy bentonite microbial diversity in the long-term performance of a deep nuclear waste repository

Similar Items