Vaterite bio-precipitation induced by Bacillus pumilus isolated from a solutional cave in Paiania, Athens, Greece
| Autor: | A. Magoulas, Aristomenis P. Karageorgis, Ioannis Katsikis, G. Kotoulas, Markos I. Daskalakis, Asterios Bakolas, A. Mavridou, Fotis Rigas |
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| Rok vydání: | 2015 |
| Předmět: |
biology
Chemistry Bacillus pumilus Precipitation (chemistry) Microorganism Sonication Mineralogy Substrate (chemistry) biology.organism_classification Microbiology Biomaterials chemistry.chemical_compound Calcium carbonate Chemical engineering Vaterite Waste Management and Disposal Biomineralization |
| Zdroj: | International Biodeterioration & Biodegradation. 99:73-84 |
| ISSN: | 0964-8305 |
| DOI: | 10.1016/j.ibiod.2014.12.005 |
| Popis: | In this work, Bacillus pumilus ACA-DC 4061 was selected for its increased capability for biomineralization on marble, under different nutrient media concentrations and temperature conditions. The optimum conditions for the CaCO3 bacterially-induced precipitation were determined with the aid of testing based on the Design of Experiments (DoE). Biomineral (vaterite) precipitation was favored in both the temperatures (25 and 30 °C) investigated. Stone loss rate was reduced when the samples were subjected to sonication. Thin sections of the substrate confirmed that vaterite was able to adhere onto the surface. Finally, under non-sterile conditions mimicking an in situ application, B. pumilus ACA-DC 4061 formed a fine layer of calcium carbonate. Therefore, this microorganism showed that vaterite formation may consistently occur under specific conditions and could prove useful as a candidate for on-site applications for stone conservation. |
| Databáze: | OpenAIRE |
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