Calcifying Bacteria Flexibility in Induction of CaCO₃ Mineralization.

ABSTRACT: Microbially induced CaCO₃ precipitation (MICP) is considered as an alternative green technology for cement self-healing and a basis for the development of new biomaterials. However, some issues about the role of bacteria in the induction of biogenic CaCO₃ crystal nucleation, growth and aggregation are still debatable. Our aims were to screen for ureolytic calcifying microorganisms and analyze their MICP abilities during their growth in urea-supplemented and urea-deficient media. Nine candidates showed a high level of urease specific activity, and a sharp increase in the urea-containing medium pH resulted in efficient CaCO₃ biomineralization. In the urea-deficient medium, all ureolytic bacteria also induced CaCO₃ precipitation although at lower pH

SUBMITTER: Golovkina DA 

PROVIDER: S-EPMC7759876 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature