Skip to main content

Research Repository

Advanced Search

Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes

Pogge von Strandmann, Philip A.E.; Burton, Kevin W.; Snæbjörnsdóttir, Sandra O.; Sigfússon, Bergur; Aradóttir, Edda S.; Gunnarsson, Ingvi; Alfredsson, Helgi A.; Mesfin, Kiflom G.; Oelkers, Eric H.; Gislason, Sigurður R.

Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes Thumbnail


Authors

Philip A.E. Pogge von Strandmann

Sandra O. Snæbjörnsdóttir

Bergur Sigfússon

Edda S. Aradóttir

Ingvi Gunnarsson

Helgi A. Alfredsson

Kiflom G. Mesfin

Eric H. Oelkers

Sigurður R. Gislason



Abstract

The engineered removal of atmospheric CO2 is now considered a key component of mitigating climate warming below 1.5 °C. Mineral carbonation is a potential negative emissions technique that, in the case of Iceland’s CarbFix experiment, precipitates dissolved CO2 as carbonate minerals in basaltic groundwater settings. Here we use calcium (Ca) isotopes in both pre- and post-CO2 injection waters to quantify the amount of carbonate precipitated, and hence CO2 stored. Ca isotope ratios rapidly increase with the pH and calcite saturation state, indicating calcite precipitation. Calculations suggest that up to 93% of dissolved Ca is removed into calcite during certain phases of injection. In total, our results suggest that 165 ± 8.3 t CO2 were precipitated into calcite, an overall carbon storage efficiency of 72 ± 5%. The success of this approach opens the potential for quantification of similar mineral carbonation efforts where drawdown rates cannot be estimated by other means.

Citation

Pogge von Strandmann, P. A., Burton, K. W., Snæbjörnsdóttir, S. O., Sigfússon, B., Aradóttir, E. S., Gunnarsson, I., Alfredsson, H. A., Mesfin, K. G., Oelkers, E. H., & Gislason, S. R. (2019). Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes. Nature Communications, 10(1), Article 1983. https://doi.org/10.1038/s41467-019-10003-8

Journal Article Type Article
Acceptance Date Apr 8, 2019
Online Publication Date Apr 30, 2019
Publication Date Apr 30, 2019
Deposit Date May 29, 2019
Publicly Available Date May 29, 2019
Journal Nature Communications
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 10
Issue 1
Article Number 1983
DOI https://doi.org/10.1038/s41467-019-10003-8
Public URL https://durham-repository.worktribe.com/output/1300816

Files


Published Journal Article (733 Kb)
PDF

Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.






You might also like



Downloadable Citations