Repository logo
 

The role of microbial sulfate reduction in calcium carbonate polymorph selection

Simple item page
cam.issuedOnline2018-06-30
dc.contributor.authorLin, Chin Yik
dc.contributor.authorTurchyn, AV
dc.contributor.authorSteiner, Zvi
dc.contributor.authorBots, P
dc.contributor.authorLampronti, GI
dc.contributor.authorTosca, NJ
dc.contributor.orcidTurchyn, Sasha [0000-0002-9298-2173]
dc.contributor.orcidSteiner, Zvi [0000-0002-9584-4956]
dc.date.accessioned2019-04-30T14:57:55Z
dc.date.available2019-04-30T14:57:55Z
dc.date.issued2018-09-15
dc.description.abstractMicrobial sulfate reduction is a dominant metabolism in many marine sedimentary environments. The influence of this metabolism on the kinetics of CaCO3 growth, as well as the dominant polymorphs precipitated, is poorly understood. To investigate the role of microbial metabolism on CaCO3 precipitation and polymorph selection, we conducted growth experiments with the sulfate reducing bacteria (D. bizertensis) in media with varying Mg/Ca and different seeding materials (calcite and kaolinite). Our results suggest that sulfate reducing bacteria both induce carbonate mineral precipitation through an increase in alkalinity and serve as a nucleation sites for the growing carbonate mineral; the majority of the carbonate minerals produced were on cell material rather than mineral seeds. We also find the Mg/Ca and presence of phosphate in the media play a key role in controlling the rates of carbonate mineral precipitation and calcium carbonate polymorph selection. In media where the Mg/Ca is greater than 2, crystalline monohydrocalcite (MHC) is the primary carbonate mineral produced. Although phosphate concentrations have a lesser effect on which polymorph initially precipitates, a series of transformation experiments suggests that the presence of phosphate stabilizes MHC crystals and prevents its transformation to more stable calcium carbonate polymorphs. Collectively, these results suggest that the polymorph of microbially-mediated calcium carbonate cements is determined by the solution chemistry upon nucleation.
dc.description.sponsorshipMinistry of Education Malaysia, SLAI (Skim Latihan Akademik IPTA) scholarship to CYL
dc.identifier.doi10.17863/CAM.39286
dc.identifier.eissn1872-9533
dc.identifier.issn0046-564X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/292134
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S001670371830334X?via%3Dihub
dc.language.isoeng
dc.publisherElsevier
dc.publisher.urlhttps://www.sciencedirect.com/science/article/pii/S001670371830334X?via%3Dihub
dc.subjectMonohydrocalcite
dc.subjectMg/Ca
dc.subjectSeeding material
dc.subjectPhosphate
dc.subjectTransformation
dc.subjectSulfate reducing bacteria
dc.subjectIncubation
dc.subjectInhibitors
dc.subjectNucleation
dc.titleThe role of microbial sulfate reduction in calcium carbonate polymorph selection
dc.typeArticle
dcterms.dateAccepted2018-06-17
prism.endingPage204
prism.publicationDate2018
prism.publicationNameGeochimica et Cosmochimica Acta
prism.startingPage184
prism.volume237
pubs.funder-project-idEuropean Research Council (307582)
pubs.funder-project-idNatural Environment Research Council (NE/J017930/1)
pubs.funder-project-idNatural Environment Research Council (NE/S001344/1)
rioxxterms.licenseref.startdate2018-09-15
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1016/j.gca.2018.06.019

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Lin et al (Revised - No Track Changes) 1.pdf
Size:
2.49 MB
Format:
Adobe Portable Document Format
Description:
Accepted version
Licence
http://creativecommons.org/licenses/by-nc-nd/4.0/
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
DepositLicenceAgreement.pdf
Size:
417.78 KB
Format:
Adobe Portable Document Format
Download

Collections

Cambridge University Research Outputs