Mixing and sulphate‐reducing activity of bacteria in swelling, compacted bentonite clay under high‐level radioactive waste repository conditions

Aim: The fate of micro‐organisms in the bentonite clay surrounding high‐level radioactive waste (HLW)‐containing copper canisters in a future Swedish underground (500 m) repository were investigated. Methods and Results: Laboratory experiments were designed in which the mixing of various bacterial s...

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Veröffentlicht in:	Journal of applied microbiology 2000-12, Vol.89 (6), p.1038-1047
Hauptverfasser:	Pedersen, K., Motamedi, M., Karnland, O., Sandén, T.
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Sprache:	eng
Schlagworte:	Bacteria - growth & development Bacteria - metabolism Bentonite Biological and medical sciences Biotechnology Colony Count, Microbial Copper Environment and pollution Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Miscellaneous Oxidation-Reduction Radioactive Waste repository Silver Sulfates - metabolism Sulfides - metabolism Sulfur Radioisotopes Sulfur-Reducing Bacteria - growth & development Sulfur-Reducing Bacteria - metabolism Sweden Water Water Microbiology
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container_end_page	1047
container_issue	6
container_start_page	1038
container_title	Journal of applied microbiology
container_volume	89
creator	Pedersen, K. Motamedi, M. Karnland, O. Sandén, T.
description	Aim: The fate of micro‐organisms in the bentonite clay surrounding high‐level radioactive waste (HLW)‐containing copper canisters in a future Swedish underground (500 m) repository were investigated. Methods and Results: Laboratory experiments were designed in which the mixing of various bacterial species with swelling bentonite was studied. A clear trend of fewer cultivable bacteria at depth was seen in the clay. This trend was consistent as the incubation time was increased from 8 h to 28 weeks. Sulphate‐reducing bacteria were found to be active, reducing sulphate at the lowest density studied, 1·5 g cm−3, but sulphate reduction activity ceased at higher densities. Conclusions: The number of viable micro‐organisms in an HLW repository bentonite clay buffer will decrease rapidly during swelling and very few viable cells will be present at full compaction. Significance and Impact of the Study: Sulphate‐reducing bacteria will most probably not be able to induce corrosion of HLW‐containing copper canisters.
doi_str_mv	10.1046/j.1365-2672.2000.01212.x
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Methods and Results: Laboratory experiments were designed in which the mixing of various bacterial species with swelling bentonite was studied. A clear trend of fewer cultivable bacteria at depth was seen in the clay. This trend was consistent as the incubation time was increased from 8 h to 28 weeks. Sulphate‐reducing bacteria were found to be active, reducing sulphate at the lowest density studied, 1·5 g cm−3, but sulphate reduction activity ceased at higher densities. Conclusions: The number of viable micro‐organisms in an HLW repository bentonite clay buffer will decrease rapidly during swelling and very few viable cells will be present at full compaction. Significance and Impact of the Study: Sulphate‐reducing bacteria will most probably not be able to induce corrosion of HLW‐containing copper canisters.</description><identifier>ISSN: 1364-5072</identifier><identifier>EISSN: 1365-2672</identifier><identifier>DOI: 10.1046/j.1365-2672.2000.01212.x</identifier><identifier>PMID: 11123477</identifier><identifier>CODEN: JAMIFK</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Science Ltd</publisher><subject>Bacteria - growth & development ; Bacteria - metabolism ; Bentonite ; Biological and medical sciences ; Biotechnology ; Colony Count, Microbial ; Copper ; Environment and pollution ; Fundamental and applied biological sciences. Psychology ; Industrial applications and implications. Economical aspects ; Miscellaneous ; Oxidation-Reduction ; Radioactive Waste ; repository ; Silver ; Sulfates - metabolism ; Sulfides - metabolism ; Sulfur Radioisotopes ; Sulfur-Reducing Bacteria - growth & development ; Sulfur-Reducing Bacteria - metabolism ; Sweden ; Water ; Water Microbiology</subject><ispartof>Journal of applied microbiology, 2000-12, Vol.89 (6), p.1038-1047</ispartof><rights>2001 INIST-CNRS</rights><rights>Copyright Blackwell Science Ltd. 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Methods and Results: Laboratory experiments were designed in which the mixing of various bacterial species with swelling bentonite was studied. A clear trend of fewer cultivable bacteria at depth was seen in the clay. This trend was consistent as the incubation time was increased from 8 h to 28 weeks. Sulphate‐reducing bacteria were found to be active, reducing sulphate at the lowest density studied, 1·5 g cm−3, but sulphate reduction activity ceased at higher densities. Conclusions: The number of viable micro‐organisms in an HLW repository bentonite clay buffer will decrease rapidly during swelling and very few viable cells will be present at full compaction. Significance and Impact of the Study: Sulphate‐reducing bacteria will most probably not be able to induce corrosion of HLW‐containing copper canisters.</description><subject>Bacteria - growth & development</subject><subject>Bacteria - metabolism</subject><subject>Bentonite</subject><subject>Biological and medical sciences</subject><subject>Biotechnology</subject><subject>Colony Count, Microbial</subject><subject>Copper</subject><subject>Environment and pollution</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Industrial applications and implications. Economical aspects</subject><subject>Miscellaneous</subject><subject>Oxidation-Reduction</subject><subject>Radioactive Waste</subject><subject>repository</subject><subject>Silver</subject><subject>Sulfates - metabolism</subject><subject>Sulfides - metabolism</subject><subject>Sulfur Radioisotopes</subject><subject>Sulfur-Reducing Bacteria - growth & development</subject><subject>Sulfur-Reducing Bacteria - metabolism</subject><subject>Sweden</subject><subject>Water</subject><subject>Water Microbiology</subject><issn>1364-5072</issn><issn>1365-2672</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkctu1DAUhiMEoqXwCsgCiRUJvsRxZsGiqriqFRtYW76cdDzK2MFOOpMdj8CCJ-RJcGZGRWLFysc-3_lt6ysKRHBFcN282VSENbykjaAVxRhXmFBCq_2D4vy-8fBQ1yXHgp4VT1LaYEwY5s3j4owQQlktxHnx68btnb9FyluUpn5YqxF-__gZwU7mcG5Gd-fGGYUO6byB6BRyHqUd9H0GXiMTtsPSsEiDH4N3IyDTqxlN3kJEa3e7zoE93EGPorIuHCIB7VTKZIQhJDeGOOcgb93ogk9Pi0ed6hM8O60Xxbf3775efSyvv3z4dHV5XZqaE1q2nTJW48ZqpZgwdLUiHdccCOiWN6QDboSgWnd1p1ccGNTY1FY0NVPEEoPZRfHqmDvE8H2CNMqtSyZ_THkIU5JEtIwKzDL44h9wE6bo89skZXTVEM54htojZGJIKUInh-i2Ks6SYLlokxu52JGLHblokwdtcp9Hn5_yJ70F-3fw5CkDL0-ASkb1XVTeuHTPtQ2hqzpTb4_UzvUw__f18vPlzVKxP8XYuHY</recordid><startdate>200012</startdate><enddate>200012</enddate><creator>Pedersen, K.</creator><creator>Motamedi, M.</creator><creator>Karnland, O.</creator><creator>Sandén, T.</creator><general>Blackwell Science Ltd</general><general>Blackwell Science</general><general>Oxford University Press</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>7QO</scope><scope>7T7</scope><scope>7TM</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>M7N</scope><scope>P64</scope><scope>RC3</scope></search><sort><creationdate>200012</creationdate><title>Mixing and sulphate‐reducing activity of bacteria in swelling, compacted bentonite clay under high‐level radioactive waste repository conditions</title><author>Pedersen, K. ; Motamedi, M. ; Karnland, O. ; Sandén, T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4512-8facdb06dbaa37c2991f5b5e1eb8561fe5c772bbf4fb95e3e40c4d7643a1d1c03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Bacteria - growth & development</topic><topic>Bacteria - metabolism</topic><topic>Bentonite</topic><topic>Biological and medical sciences</topic><topic>Biotechnology</topic><topic>Colony Count, Microbial</topic><topic>Copper</topic><topic>Environment and pollution</topic><topic>Fundamental and applied biological sciences. 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Economical aspects</topic><topic>Miscellaneous</topic><topic>Oxidation-Reduction</topic><topic>Radioactive Waste</topic><topic>repository</topic><topic>Silver</topic><topic>Sulfates - metabolism</topic><topic>Sulfides - metabolism</topic><topic>Sulfur Radioisotopes</topic><topic>Sulfur-Reducing Bacteria - growth & development</topic><topic>Sulfur-Reducing Bacteria - metabolism</topic><topic>Sweden</topic><topic>Water</topic><topic>Water Microbiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pedersen, K.</creatorcontrib><creatorcontrib>Motamedi, M.</creatorcontrib><creatorcontrib>Karnland, O.</creatorcontrib><creatorcontrib>Sandén, T.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Biotechnology Research Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Nucleic Acids Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><jtitle>Journal of applied microbiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pedersen, K.</au><au>Motamedi, M.</au><au>Karnland, O.</au><au>Sandén, T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mixing and sulphate‐reducing activity of bacteria in swelling, compacted bentonite clay under high‐level radioactive waste repository conditions</atitle><jtitle>Journal of applied microbiology</jtitle><addtitle>J Appl Microbiol</addtitle><date>2000-12</date><risdate>2000</risdate><volume>89</volume><issue>6</issue><spage>1038</spage><epage>1047</epage><pages>1038-1047</pages><issn>1364-5072</issn><eissn>1365-2672</eissn><coden>JAMIFK</coden><abstract>Aim: The fate of micro‐organisms in the bentonite clay surrounding high‐level radioactive waste (HLW)‐containing copper canisters in a future Swedish underground (500 m) repository were investigated. Methods and Results: Laboratory experiments were designed in which the mixing of various bacterial species with swelling bentonite was studied. A clear trend of fewer cultivable bacteria at depth was seen in the clay. This trend was consistent as the incubation time was increased from 8 h to 28 weeks. Sulphate‐reducing bacteria were found to be active, reducing sulphate at the lowest density studied, 1·5 g cm−3, but sulphate reduction activity ceased at higher densities. Conclusions: The number of viable micro‐organisms in an HLW repository bentonite clay buffer will decrease rapidly during swelling and very few viable cells will be present at full compaction. Significance and Impact of the Study: Sulphate‐reducing bacteria will most probably not be able to induce corrosion of HLW‐containing copper canisters.</abstract><cop>Oxford, UK</cop><pub>Blackwell Science Ltd</pub><pmid>11123477</pmid><doi>10.1046/j.1365-2672.2000.01212.x</doi><tpages>10</tpages></addata></record>
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source	MEDLINE; Access via Wiley Online Library; Oxford University Press Journals All Titles (1996-Current)
subjects	Bacteria - growth & development Bacteria - metabolism Bentonite Biological and medical sciences Biotechnology Colony Count, Microbial Copper Environment and pollution Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Miscellaneous Oxidation-Reduction Radioactive Waste repository Silver Sulfates - metabolism Sulfides - metabolism Sulfur Radioisotopes Sulfur-Reducing Bacteria - growth & development Sulfur-Reducing Bacteria - metabolism Sweden Water Water Microbiology
title	Mixing and sulphate‐reducing activity of bacteria in swelling, compacted bentonite clay under high‐level radioactive waste repository conditions
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