Hasemer et al. (2024): Measuring Enhanced Weathering: inorganic carbon-based approaches may be required to complement cation-based approaches
Heath D. Hasemer, Justin Borevitz, Wolfram Buss IN: Frontiers in Climate, doi: 10.3389/fclim.2024.1352825
This study compares current measurement approaches that focus on quantifying inorganic carbon and cations within the soil and leachate. Cation-based calculations of CDR were compared to inorganic carbon-based calculations of CDR and soil results were compared to leachate results. The recovery rate of cations in the soil fraction was also tested. Three different ground silicate minerals/rocks – basalt, olivine and wollastonite, were mixed with two different soils and were allowed to weather over 16 weeks in pots with and without plants under different watering regimes and the application of an acidifying fertiliser. Soil and leachate samples were analysed for cations by ICP-OES and inorganic carbon by direct acidification and total alkalinity titration (in leachate only).