Dynamic pH control for selective CO2 carbonation and tunable CaCO3 formation from multi-ion solutions
• Two pH control strategies (swing, constant) selectively precipitate CaCO 3 from multi-ion mine tailing leachates. • The pH-swing method yields fine, uniform Calcite particles via rapid nucleation. • The pH-constant method produces larger particles and a bimodal size distribution. • About 90% Ca 2+ conversion is achieved, mineralising ∼185 kg CO 2 per tonne of tailings.
Authors
- Kai Sundmacher (ORCID: https://orcid.org/0000-0003-3251-0593)
- Andreas Voigt (ORCID: https://orcid.org/0000-0002-3586-3565)
- Chinmay Hegde (ORCID: https://orcid.org/0009-0009-3445-6405)
Institutions
- Max Planck Institute for Dynamics of Complex Technical Systems (DE)
- Otto-von-Guericke-Universität Magdeburg (DE)
Publication Details
- Journal
- Journal of CO2 Utilization
- Published
- 2026-05-23
- DOI
- https://doi.org/10.1016/j.jcou.2026.103457
- Primary Topic
- Calcium Carbonate Crystallization and Inhibition
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Deutsche Forschungsgemeinschaft