Experimental solubility of silica in nano-pores - INSU - Institut national des sciences de l'Univers Access content directly
Conference Papers Year : 2012

Experimental solubility of silica in nano-pores

Abstract

We used a pressure membrane extractor (Model 1020, Soil Moisture Equipment Corp.) to study the silica content at equilibrium with the decreasing pore sizes of amorphous silica. The principle is to extract the aqueous solution through a sequential process from the larger (micrometric) pores to the thinner (some nm) pores. Each extraction step is followed by an equilibration period. The measurements confirmed earlier observations [1,2] that the concentration in dissolved silica decreases when the extraction pressure increases. The direct conclusion is that the silica solubility is pore-size dependent. These results are interpreted with the Young- Laplace relationship, at constant silica-solution surface tension, which means to attribute an elasto-capillary pressure to the solid.
Fichier principal
Vignette du fichier
2100.pdf (258.29 Ko) Télécharger le fichier
Origin : Explicit agreement for this submission

Dates and versions

insu-01291793 , version 1 (23-03-2016)

Identifiers

  • HAL Id : insu-01291793 , version 1

Cite

Lionel Mercury, Majda Bouzid, Jean-Michel Matray. Experimental solubility of silica in nano-pores. 20th annual V.M. Goldschmidt Conference, Jun 2012, Montréal, Canada. ⟨insu-01291793⟩
88 View
187 Download

Share

Gmail Facebook Twitter LinkedIn More