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Journal Articles Journal of Physical Chemistry Letters Year : 2016

The Alkaline Dissolution Rate of Calcite

Le taux de dissolution alcalin de la calcite

Jean Colombani


Due to the widespread presence of calcium carbonate on Earth, several geochemical systems, among which the global CO2 cycle, are controlled to a large extent by the dissolution and precipitation of this mineral. For this reason, the dissolution of calcite has been thoroughly investigated for decades. Despite this intense activity, a consensual value of the dissolution rate of calcite has not been found yet. We show here that the inconsistency between the reported values stems mainly from the variability of the chemical and hydrodynamic conditions of measurement. The spreading of the values, when compared in identical conditions, is much less than expected and is interpreted in terms of sample surface topography. This analysis leads us to propose benchmark values of the alkaline dissolution rate of calcite compatible with all the published values, and a method to use them in various chemical and hydrodynamic contexts.
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Dates and versions

hal-01331143 , version 1 (13-06-2016)



Jean Colombani. The Alkaline Dissolution Rate of Calcite. Journal of Physical Chemistry Letters, 2016, 7 (13), pp.2376-2380. ⟨10.1021/acs.jpclett.6b01055⟩. ⟨hal-01331143⟩
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