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dc.contributor.author
Al Disi, Zulfa A.
dc.contributor.author
Bontognali, Tomaso R.R.
dc.contributor.author
Jaoua, Samir
dc.contributor.author
Attia, Essam S.M.
dc.contributor.author
Al Saad Al‑Kuwari, Hamad
dc.contributor.author
Zouari, Nabil
dc.date.accessioned
2020-02-04T08:48:31Z
dc.date.available
2020-01-03T03:44:21Z
dc.date.available
2020-01-10T11:46:11Z
dc.date.available
2020-02-04T08:48:31Z
dc.date.issued
2019-12
dc.identifier.issn
2045-2322
dc.identifier.other
10.1038/s41598-019-56144-0
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/387424
dc.identifier.doi
10.3929/ethz-b-000387424
dc.description.abstract
Studies have demonstrated that microbes facilitate the incorporation of Mg2+ into carbonate minerals, leading to the formation of potential dolomite precursors. Most microbes that are capable of mediating Mg-rich carbonates have been isolated from evaporitic environments in which temperature and salinity are higher than those of average marine environments. However, how such physicochemical factors affect and concur with microbial activity influencing mineral precipitation remains poorly constrained. Here, we report the results of laboratory precipitation experiments using two mineral-forming Virgibacillus strains and one non-mineral-forming strain of Bacillus licheniformis, all isolated from the Dohat Faishakh sabkha in Qatar. They were grown under different combinations of temperature (20°, 30°, 40 °C), salinity (3.5, 7.5, 10 NaCl %w/v), and Mg2+:Ca2+ ratios (1:1, 6:1 and 12:1). Our results show that the incorporation of Mg2+ into the carbonate minerals is significantly affected by all of the three tested factors. With a Mg2+:Ca2+ ratio of 1, no Mg-rich carbonates formed during the experiments. With a Mg2+:Ca2+ ratios of 6 and 12, multivariate analysis indicates that temperature has the highest impact followed by salinity and Mg2+:Ca2+ ratio. The outcome of this study suggests that warm and saline environments are particularly favourable for microbially mediated formation of Mg-rich carbonates and provides new insight for interpreting ancient dolomite formations.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Nature Publishing Group
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Influence of temperature, salinity and Mg2+:Ca2+ ratio on microbially-mediated formation of Mg-rich carbonates by Virgibacillus strains isolated from a sabkha environment
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Scientific Reports
ethz.journal.volume
9
en_US
ethz.journal.abbreviated
Sci Rep
ethz.pages.start
19633
en_US
ethz.size
12 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2020-01-03T03:44:24Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-01-10T11:46:20Z
ethz.rosetta.lastUpdated
2021-02-15T07:48:13Z
ethz.rosetta.versionExported
true
ethz.COinS
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