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Calcium carbonate biofouling

Biofouling is the formation of composite deposits consisting of living organic matter and inorganic salts. So far there is little mechanistic information on biofouling. In this work the role of the presence microalgae on the nucleation and growth of calcium carbonate from aqueous supersaturated solutions was investigated with free drift and constant supersaturation batch experiments at 25oC. Living and dead microalgae colonies were used to inoculate aqueous solutions supersaturated with respect to calcium carbonate. The presence of algae accelerated the crystal growth of calcium carbonate while at the same time affected the nucleation process showing a catalytic activity. Higher acceleration was found for higher amounts of microalgal colonies. The extracellular components of the test microalgae are believed to play important role on the nucleation and the subsequent rate of precipitation of calcite which was the only polymorph forming on the algae. It is suggested that the polysaccharides contained exert a templating effect for the formation of the mineral phase on the organic matter.

Product Number: 51319-12930-SG
Author: Petros Koutsoukos
Publication Date: 2019
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