Etude de la chimie de l'eau en présence d'ions dans des silices nanoporeuses - Archive ouverte HAL Access content directly
Conference Papers Year : 2016

Etude de la chimie de l'eau en présence d'ions dans des silices nanoporeuses

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Abstract

Prediction of material behaviors regarding their interactions with water is interesting for geochemistry and requires the use of modelling. Thermodynamic models and rate laws integrated in computer programs (PHREEQC, JChess…) used to predict materials dissolution kinetics and phase transformation integrate data obtained from experiments performed in diluted media. Due to the fact that most of the materials in these domains are nanoporous filled with water and ions (clay materials, secondary minerals formed from rocks, alteration layer of glasses…) and the validity of these models and rate laws are still not proven yet, thus, prediction can be defective.1 The strong interaction between water and the surface in confined media are not considered in such calculations. Furthermore, it is also expected that nanoconfined water molecules are strongly influenced by the presence of ions through sorption processes at the surface. The ions ability to be solvated also modifiy the electrostatic interactions in the system. These are really important since it strongly impacts the hydrolysis rate of materials
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Dates and versions

hal-02441908 , version 1 (27-02-2020)

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  • HAL Id : hal-02441908 , version 1

Cite

Markus Baum. Etude de la chimie de l'eau en présence d'ions dans des silices nanoporeuses. Journées scientifiques de Marcoule 2016, Jun 2016, Bagnols sur cèze, France. ⟨hal-02441908⟩

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