Highlights
- A new strategy for the laboratory study of CaCO3 dissolution in seawater using the Solution oriented approach is proposed based on the mixed kinetics model.
- A check-list is provided against which any new design of experiment choosing to adopt this new strategy, can be tested before implementation.
Abstract
While the distribution of undersaturation of CaCO3 in the oceans is broadly known by applying chemical equilibrium theory, there is an increasing need, especially with advancing Climate Change and acidification of the oceans, to know about CaCO3-dissolution kinetics in more mobile systems. Experiments conducted in the laboratory to mimic conditions in the oceans in these faster circumstances often operate at even higher overall velocities, and matching laboratory simulations to field conditions is once again, problematic. Added to this, it has been shown in the last few years that when heterogeneous chemical kinetics developed out of its homogeneous counterpart, essential kinetics rigor was not carried forward. The Solution-oriented approach has been developed to recover the lost rigor, and the mathematical modelling of an in-line sequence of, molecular and diffusion components, which rely upon rigorous chemical kinetics, accompanies these developments. This paper supports workers adopting this new approach by describing 9 major practical issues that should be built into future experiments intending to prove the modelling.
Truesdale V. W., Greenwood J. & Southern T., 2026. On the future strategy for dissolution kinetics of CaCO3 in seawater by the solution-oriented approach. Marine Chemistry: 104692. doi: 10.1016/j.marchem.2026.104692. Article (subscription required).
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