Related Experiment Video
Updated: Aug 10, 2025
09:04
Microbiologically Induced Calcite Precipitation Mediated by Sporosarcina pasteurii
Published on: April 16, 2016
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Single Calcite Particle Dissolution Kinetics: Revealing the Influence of Mass Transport.
Xinmeng Fan1, Christopher Batchelor-McAuley1, Minjun Yang1
1Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, Great Britain.
ACS Measurement Science Au
|February 14, 2023
Summary
Calcite dissolution is controlled by ion transport away from a saturated surface, not surface reactions. This finding impacts climate change ocean modeling.
Area of Science:
- Geochemistry
- Chemical Oceanography
Background:
- Calcite dissolution is crucial for geochemical cycles.
- Previous studies assumed surface-controlled reactions, leading to inconsistencies.
Purpose of the Study:
- To determine calcite dissolution kinetics at the single particle scale.
- To re-evaluate previous assumptions about mineral dissolution.
Main Methods:
- Experimental determination of calcite dissolution rates.
- Analysis of kinetic data at high undersaturation.
Main Results:
- Calcite dissolution rate is controlled by diffusion of ions away from a saturated surface.
- High undersaturation and absence of inhibitors favor this transport control.
- Inconsistencies in prior surface-reaction-controlled models are identified.
Conclusions:
- The study redefines calcite dissolution mechanisms.
- Findings have significant implications for climate change and ocean modeling.
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