Calcium carbonates: induced biomineralization with controlled macromorphology

Abstract:

Biomineralization of (magnesium) calcite and vaterite by bacterial isolates has been known for quite some time. However, the extracellular precipitation has hardly ever been linked to different morphologies of the minerals that are observed. Here, isolates from limestone-associated groundwater, rock and soil were shown to form calcite, magnesium calcite or vaterite. More than 92 % of isolates were indeed able to form carbonates, while abiotic controls failed to form minerals. The crystal morphologies varied, including rhombohedra, prisms and pyramid-like macromorphologies. Different conditions like varying temperature, pH or media components, but also cocultivation to test for collaborative effects of sympatric bacteria, were used to differentiate between mechanisms of calcium carbonate formation. Single crystallites were cemented with bacterial cells; these may have served as nucleation sites by providing a basic pH at short distance from the cells. A calculation of potential calcite formation of up to 2 g L−1 of solution made it possible to link the microbial activity to geological processes.

SEEK ID: https://data.chembiosys.de/publications/73

DOI: 10.5194/bg-14-4867-2017

Projects: C3

Publication type: Not specified

Journal: Copernicus GmbH

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Date Published: 6th Nov 2017

Registered Mode: Not specified

Authors: Aileen Meier, Anne Kastner, Dennis Harries, Maria Wierzbicka-Wieczorek, Juraj Majzlan, Georg Büchel, Erika Kothe

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Meier, A., Kastner, A., Harries, D., Wierzbicka-Wieczorek, M., Majzlan, J., Büchel, G., & Kothe, E. (2017). Calcium carbonates: induced biomineralization with controlled macromorphology. Biogeosciences, 14(21), 4867–4878. http://doi.org/10.5194/bg-14-4867-2017
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Created: 23rd Nov 2017 at 08:52

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