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Influence of pH and organic ligands on dissolution kinetics of natural silicatesстатья
- Авторы: Karaseva O.N., Lakshtanov L.Z., Khanin D.A., Proskuryakova A.S.
- Журнал: Experiment in GeoSciences
- Том: 29
- Номер: 1
- Год издания: 2023
- Первая страница: 142
- Последняя страница: 145
- Аннотация: Natural silicates are potential sources of divalentcations, which are necessary for the mineralization of CO2in carbonate minerals. In order to study the dissolutionkinetics of serpentine and talc in neutral and acidicsolutions (HCl, citric and oxalic acids), experiments wereperformed in a flow-through reactor at 25 0C. It was foundthat under neutral conditions, the dissolution rate ofsilicate minerals is minimal, it increases with a decrease ofpH and in the presence of organic ligands. Dissolution ofsilicate samples demonstrate two stages: a fast one withthe predominant leaching of magnesium cations into thesolution, and a slow stoichiometric stage. Initialincongruent stage may be the most promising for thedevelopment of carbonation technologies, since theminimum removal of the network-forming elements Si andAl prevents the undesirable formation of secondaryminerals (for example, clays), which exclude divalentcations from the carbonation process and greatly reducethe permeability of rocks
- Добавил в систему: Карасева Ольга Николаевна