Only basalt absorption judging by the wording, and that sounds optimist (unsurprising for marketing material): "One tonne of basalt captures 0.153–0.165 tonne

Only basalt absorption judging by the wording, and that sounds optimist (unsurprising for marketing material): "One tonne of basalt captures 0.153–0.165 tonne CO2, depending on infiltration rate (400–1200 mm/a), reactive surface area (3.7–15 m2/g) and CO2 partial pressure (41.1–3000 Pa). When the infiltration rate is high (1200 mm/a), the CO2 capture capacity of basalt is exhausted after 9.5–11.4 years." [1] [1] https://link.springer.com/article/10.1007/s12665-022-10320-0 https://link.springer.com/article/10.1007/s12665-022-10320-0