Pogge von Strandmann, PAE;
Tooley, C;
Mulders, JJPA;
Renforth, P;
(2022)
The Dissolution of Olivine Added to Soil at 4°C: Implications for Enhanced Weathering in Cold Regions.
Frontiers in Climate
, 4
, Article 827698. 10.3389/fclim.2022.827698.
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Abstract
Crushed olivine was added to a soil core to mimic enhanced weathering, and water was continually dripped through for ~6 months. Our experiments were conducted at 4°C, and are compared to previously run identical experiments at 19°C. Olivine dissolution rates in both experiments start out similar, likely due to fines and sharp crystal corners. However, after >100 days of reaction, the dissolution rate at 4°C was two orders of magnitude lower than at 19°C. The accumulation of heavy metals, such as Ni and Cd, was low in both experiments, but soil retention of these elements was proportionally higher at higher temperatures, likely due to enhanced sorption and formation of clays. Overall, this study suggests that olivine dissolution rates in experiments that mimic natural settings are orders of magnitude slower than in normal laboratory experiments, and that enhanced weathering may be a considerably less efficient method of carbon dioxide removal at low climatic temperatures. Both of these conclusions have implications for the application of enhanced weathering as a CO2 removal method.
| Type: | Article |
|---|---|
| Title: | The Dissolution of Olivine Added to Soil at 4°C: Implications for Enhanced Weathering in Cold Regions |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3389/fclim.2022.827698 |
| Publisher version: | https://doi.org/10.3389/fclim.2022.827698 |
| Language: | English |
| Additional information: | © 2022 Pogge von Strandmann, Tooley, Mulders and Renforth. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
| Keywords: | weathering, carbon sequestration, weathering experiment, enhanced weathering of minerals, temperature effect on weathering |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10145184 |
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