The size and polydispersity of silica nanoparticles under simulated hot spring 
conditions

Tobler, D. J.; Benning, Liane G.; Knapp, J.

doi:10.1180/minmag.2008.072.1.287

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The size and polydispersity of silica nanoparticles under simulated hot spring conditions

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Tobler, D. J.
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Benning, Liane G.
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Knapp, J.
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Tobler, D. J., Benning, L. G., Knapp, J. (2008): The size and polydispersity of silica nanoparticles under simulated hot spring conditions. - Mineralogical Magazine, 72, 1, 287-290.
https://doi.org/10.1180/minmag.2008.072.1.287

Cite as: https://gfzpublic.gfz.de/pubman/item/item_806956

Abstract

The nucleation and growth of silica nanoparticles in supersaturated geothermal waters was simulated using a flow-through geothermal simulator system. The effect of silica concentration ([SiO2]), ionic strength (IS), temperature (T) and organic additives on the size and polydispersity of the forming silica nanoparticles was quantified. A decrease in temperature (58 to 33 degrees C) and the addition of glucose restricted particle growth to sizes <20 mm, while varying [SiO2] or IS did not affect the size (30-35 nm) and polydispersity (+/- 9 nm) observed at 58 degrees C. Conversely, the addition of xanthan gum induced the development of thin films that enhanced silica aggregation.