Anaerobic microbial corrosion of carbon steel under conditions relevant for deep geological repository of nuclear waste

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43923134" target="_blank" >RIV/60461373:22310/21:43923134 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/26722445:_____/21:N0000011 RIV/00216208:11310/21:10439415 RIV/46747885:24220/21:00008940 RIV/46747885:24620/21:00008940

Výsledek na webu

<a href="https://www.journals.elsevier.com/science-of-the-total-environment" target="_blank" >https://www.journals.elsevier.com/science-of-the-total-environment</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.scitotenv.2021.149539" target="_blank" >10.1016/j.scitotenv.2021.149539</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Anaerobic microbial corrosion of carbon steel under conditions relevant for deep geological repository of nuclear waste

Popis výsledku v původním jazyce

We examined microbial corrosion of carbon steel in synthetic bentonite pore water inoculated with natural underground water containing microorganisms over a period of 780-days under sterile and anaerobic conditions. Corrosion behaviour was determined using the mass loss method, SEM-EDS analysis and Raman spectroscopy, while qualitative and quantitative changes in the microbial community were analysed using molecular biological tools (16S rDNA amplicon sequencing and qPCR analysis, respectively). Corrosion rates were signifi-cantly higher in the biotic environment (compared with an abiotic environment), with significant localisation of corrosion attacks of up to 1 mm arising within 12-months. Nitrate reducing bacteria, such as Pseudomonas, Brevundimonas and Methyloversatilis, dominated the microbial consortium, the high abundance of Methyloversatilis correlating with periods of highest localised corrosion penetrations, suggesting that this bacterium plays an important role in microbially influenced corrosion. Our results indicate that nitrate-reducing bacteria could represent a potential threat to waste canisters under nuclear repository conditions. (c) 2021 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Anaerobic microbial corrosion of carbon steel under conditions relevant for deep geological repository of nuclear waste

Popis výsledku anglicky

We examined microbial corrosion of carbon steel in synthetic bentonite pore water inoculated with natural underground water containing microorganisms over a period of 780-days under sterile and anaerobic conditions. Corrosion behaviour was determined using the mass loss method, SEM-EDS analysis and Raman spectroscopy, while qualitative and quantitative changes in the microbial community were analysed using molecular biological tools (16S rDNA amplicon sequencing and qPCR analysis, respectively). Corrosion rates were signifi-cantly higher in the biotic environment (compared with an abiotic environment), with significant localisation of corrosion attacks of up to 1 mm arising within 12-months. Nitrate reducing bacteria, such as Pseudomonas, Brevundimonas and Methyloversatilis, dominated the microbial consortium, the high abundance of Methyloversatilis correlating with periods of highest localised corrosion penetrations, suggesting that this bacterium plays an important role in microbially influenced corrosion. Our results indicate that nitrate-reducing bacteria could represent a potential threat to waste canisters under nuclear repository conditions. (c) 2021 Elsevier B.V. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Science of the Total Environment

ISSN

0048-9697

e-ISSN

—

Svazek periodika

800

Číslo periodika v rámci svazku

8 August 2021

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

2-12

Kód UT WoS článku

000702859900011

EID výsledku v databázi Scopus

2-s2.0-85112352405