Mineralogy of Bioprecipitate Evolution over Induction Times Mediated by Halophilic Bacteria under Various Mg/Ca Molar Ratios.

ABSTRACT: In microbial mineralization experiments, the induction time of mineral precipitation is ambiguous, and this may lead to difficulties in reproducing and confirming the test results. To explore the link between induction time and microbially mediated carbonate precipitation, we report here the mineralogy and morphology of carbonate precipitates induced by the halophilic Halomonas utahensis WMS2 bacterium in media with various Mg/Ca molar ratios over a range of induction times. The results show that the biominerals are formed in an alkaline environment affected by ammonia secreted by H. utahensis WMS2 bacteria. The content of dissolved inorganic carbon increased as a result of carbonic anhydrase catalyzing the hydration of carbon dioxide to release bicarbonate and carbonate ions

SUBMITTER: Han Z 

PROVIDER: S-EPMC9435042 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature