Pulsating dissolution of crystalline matter


Pulsating dissolution of crystalline matter

Fischer, C.; Lüttge, A.

Fluid-solid reactions result in dissolution or precipitation reactions. The prediction of the related material flux
from or to the reacting surface, its variations and changes with time are of interest to a wide array of disciplines.
Reaction rate maps that are derived from sequences of topography maps illustrate the spatial distribution of
reaction rates across the crystal surface [1]. Here we present dissolution rate maps that reveal the existence
of rhythmic pulses of the material flux from the crystal surface. This observation leads to a change in our
understanding of the way crystalline matter dissolves. Rhythmic fluctuations of the reactive surface site density
and potentially concomitant oscillations in the fluid saturation imply spatial and temporal variability in surface
reaction rates. Knowledge of such variability could aid attempts to upscale microscopic rates and predict reactive
transport through changing porous media.
[1] Fischer, C., Luttge, A., 2017. Beyond the conventional understanding of water–rock reactivity. Earth and
Planetary Science Letters 457, 100-105.

  • Lecture (Conference)
    EGU 2018 - European Geosciences Union General Assembly 2018, 08.-13.04.2018, Wien, Österreich

Permalink: https://www.hzdr.de/publications/Publ-28252
Publ.-Id: 28252