Abstract
The dissolution kinetics of albite were studied using a continuous flow reactor based on the fluidized bed technique. The influence of pH and concentration of dissolved Na, Al and Si was investigated. The results indicate that the mechanism in- volves three successive steps: 1) rapid exchange of Na+ with H+, 2) build-up of a residual layer depleted in Na and also depleted in Al under acidic conditions, and 3) a steady-state and congruent dissolution stage where the rate is controlled by a surface reaction between the residual layer and the solution. It might be possible to describe the kinetics of this steady-state stage in terms of activated surface complexes, but their nature is certainly more complicated than previously considered.
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© 1985 D. Reidel Publishing Company
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Wollast, R., Chou, L. (1985). Kinetic Study of The Dissolution of Albite with a Continuous Flow-Through Fluidized Bed Reactor. In: Drever, J.I. (eds) The Chemistry of Weathering. Nato ASI Series, vol 149. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5333-8_5
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DOI: https://doi.org/10.1007/978-94-009-5333-8_5
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