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Título

Carbonate and Phosphate Precipitation by Chromohalobacter marismortui

AutorAngustias Rivadeneyra, María; Martín-Algarra, Agustín; Sánchez-Navas, A.; Martín-Ramos, Daniel
Palabras claveBiomineralization
Aragonite
Huntite
Ca-Mg kutnahorite
Magnesian calcite
Monohydrocalcite
Struvite
Vaterite
C. marismortui
Fecha de publicaciónmar-2006
EditorTaylor & Francis
CitaciónGeomicrobiology Journal 23(2): 89-101 (2006)
ResumenThe ability of Chromohalobacter marismortui to precipitate carbonate and phosphate minerals has been demonstrated for the first time. Mineral precipitation in both solid and liquid media at different salts concentrations and different magnesium/calcium ratios occurred whereas crystal formation was not observed in the control. The precipitated minerals were studied by X-ray diffraction, scanning electron microscopy and EDX, and were different in liquid and solid media. In liquid media aragonite, struvite, vaterite and monohydrocalcite were precipitated forming crystals and bioliths. Bioliths accreted preferentially close to organic pellicles, whereas struvite preferentially grows in microenvironments free of such pellicles. Magnesian calcite, calcian-magnesian kutnahorite, “proto-dolomite” and huntite were formed in solid media. The Mg content of the magnesian calcite and of Ca-Mg kutnahorite also varied depending on the salt concentration of the culture media. This is the first report on bacterial precipitation of Ca-Mg kutnahorite and huntite in laboratory cultures. The results of this research show the active role played by C. marismortui in mineral precipitation, and allow us to compare them with those obtained previously using other taxonomic groups of moderately halophilic bacteria.
Descripción13 pages, 6 figures, 2 tables.
Versión del editorhttp//dx.doi.org/10.1080/01490450500533882
URIhttp://hdl.handle.net/10261/18673
DOI10.1080/01490450500533882
ISSN0149-0451 (Print)
1521-0529 (Online)
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