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Single Calcite Particle Dissolution Kinetics: Revealing the Influence of Mass Transport.

ABSTRACT: Calcite dissolution kinetics at the single particle scale are determined. It is demonstrated that at high undersaturation and in the absence of inhibitors the particulate mineral dissolution rate is controlled by a saturated calcite surface in local equilibrium with dissolved Ca²⁺ and CO₃ ^2- coupled with rate determining diffusive transport of the ions away from the surface. Previous work is revisited and inconsistencies arising from the assumption of a surface-controlled reaction are highlighted. The data have implications for ocean modeling of climate change.

SUBMITTER: Fan X

PROVIDER: S-EPMC9885995 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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Single Calcite Particle Dissolution Kinetics: Revealing the Influence of Mass Transport.

Fan Xinmeng X Batchelor-McAuley Christopher C Yang Minjun M Compton Richard G RG

ACS measurement science au 20220712 5

Calcite dissolution kinetics at the single particle scale are determined. It is demonstrated that at high undersaturation and in the absence of inhibitors the particulate mineral dissolution rate is controlled by a saturated calcite surface in local equilibrium with dissolved Ca2+ and CO3 2- coupled with rate determining diffusive transport of the ions away from the surface. Previous work is revisited and inconsistencies arising from the assumption of a surface-c ...[more]

PMID: 36785660

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