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| Titel |
On the existence of stationary reaction fronts in precipitation-dissolution systems |
| VerfasserIn |
Paweł Kondratiuk, Hanna Nizinkiewicz, Anthony J. C. Ladd, Piotr Szymczak |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086564
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| Publikation (Nr.) |
 EGU/EGU2014-455.pdf |
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| Zusammenfassung |
| Coupled precipitation-dissolution processes are ubiquitous in hydrogeochemical systems which are out of chemical equilibrium. However, as already remarked by Ortoleva et al. [1], the precipitation front will in general move with a velocity different form that of a dissolution front; thus the distance between them will increase in time. However, there are a number of systems where the both fronts appear to move with the same velocity. One example is the terra rossa formation process [2], in which kaolinite precipitation produces hydrogen ions that dissolve the underlying calcite. In this case the velocities of the dissolution and precipitation front agree to within 1%, which does not seem accidental. In this communication, we propose a possible mechanism of such a front synchronization, and study its further implications for the dynamics of the system.
[1] P. Ortoleva et al., Physica D: 19, 334 (1986)
[2] E. Merino and A. Banjerjee, J. Geol., 116, 62 (2008) |
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