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dc.contributor.authorRani, A.
dc.contributor.authorRockne, KJ
dc.contributor.authorDrummond, J.
dc.contributor.authorAl-Hinai, M.
dc.contributor.authorRanjan, R.
dc.date.accessioned2016-02-12T00:25:39Z
dc.date.available2016-02-12T00:25:39Z
dc.date.issued2015-08-14
dc.identifier.bibliographicCitationRani, A., Rockne, K. J., Drummond, J., Al-Hinai, M. and Ranjan, R. Geochemical influences and mercury methylation of a dental wastewater microbiome. Scientific Reports. 2015. 5. DOI: 10.1038/srep12872.en_US
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/10027/20128
dc.descriptionThis is the copy of an article published in Scientific Reports © 2013 Nature Publishing Group.en_US
dc.description.abstractThe microbiome of dental clinic wastewater and its impact on mercury methylation remains largely unknown. Waste generated during dental procedures enters the sewer system and contributes a significant fraction of the total mercury (tHg) and methyl mercury (MeHg) load to wastewater treatment facilities. Investigating the influence of geochemical factors and microbiome structure is a critical step linking the methylating microorganisms in dental wastewater (DWW) ecosystems. DWW samples from a dental clinic were collected over eight weeks and analyzed for geochemical parameters, tHg, MeHg and bacterio-toxic heavy metals. We employed bacterial fingerprinting and pyrosequencing for microbiome analysis. High concentrations of tHg, MeHg and heavy metals were detected in DWW. The microbiome was dominated by Proteobacteria, Actinobacteria, Bacteroidetes, Chloroflexi and many unclassified bacteria. Significant correlations were found between the bacterial community, Hg levels and geochemical factors including pH and the predicted total amount (not fraction) of neutral Hg-sulfide species. The most prevalent known methylators included Desulfobulbus propionicus, Desulfovibrio desulfuricans, Desulfovibrio magneticus and Geobacter sulfurreducens. This study is the first to investigate the impact of high loads of Hg, MeHg and other heavy metals on the dental clinic wastewater microbiome, and illuminates the role of many known and unknown sulfatereducing bacteria in Hg methylation.en_US
dc.description.sponsorshipThis work was supported in part by a fellowship from the Sultanate of Oman to M.A.-H. We also acknowledge the Research Open Access Publishing (ROAAP) Fund of the University of Illinois at Chicago for financial support towards the open access publishing fee for this article.en_US
dc.publisherNature Publishing Groupen_US
dc.titleGeochemical influences and mercury methylation of a dental wastewater microbiomeen_US
dc.typeArticleen_US


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