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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/37309

Title: Bioprecipitation of Calcium Carbonate Crystals by Bacteria Isolated from Saline Environments Grown in Culture Media Amended with Seawater and Real Brine
Authors: Silva-Castro, Gloria Andrea
Uad, Imane
González-Martínez, A.
Rivadeneyra, Almudena
González López, Jesús
Rivadeneyra, María Angustias
Issue Date: 2015
Abstract: The precipitation of calcium carbonate and calcium sulphate by isolated bacteria from seawater and real brine obtained in a desalination plant growth in culture media containing seawater and brine as mineral sources has been studied. However, only bioprecipitation was detected when the bacteria were grown in media with added organic matter. Biomineralization process started rapidly, crystal formation taking place in the beginning a few days after inoculation of media; roughly 90% of total cultivated bacteria showed. Six major colonies with carbonate precipitation capacity dominated bacterial community structure cultivated in heterotrophic platable bacteria medium. Taxonomic identification of these six strains through partial 16S rRNA gene sequences showed their affiliation with Gram-positive Bacillus and Virgibacillus genera. These strains were able to form calcium carbonate minerals, which precipitated as calcite and aragonite crystals and showed bacterial fingerprints or bacteria calcification. Also, carbonic anhydrase activity was observed in three of these isolated bacteria. The results of this research suggest that microbiota isolated from sea water and brine is capable of precipitation of carbonate biominerals, which can occur in situ with mediation of organic matter concentrations. Moreover, calcium carbonate precipitation ability of this microbiota could be of importance in bioremediation of CO2 and calcium in certain environments.
Sponsorship: This investigation was funded by the EC FP7 CO2SolStock research consortium.
Publisher: Hindawi Publishing Corporation
Keywords: Calcium carbonate
URI: http://hdl.handle.net/10481/37309
ISSN: 2314-6133
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Silva-Castro, G.A.; et al. Bioprecipitation of Calcium Carbonate Crystals by Bacteria Isolated from Saline Environments Grown in Culture Media Amended with Seawater and Real Brine. Biomed Research International, 2015: 816102 (2015). [http://hdl.handle.net/10481/37309]
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