Limited reactivity of pyroxene and plagioclase in batch experiments with supercritical CO

• Tác giả: Wladyslaw Altermann, Frédéric J Doucet, Zakhele H Nkosi, Herbert Pölmann
• Ngôn ngữ: eng
• Ký hiệu phân loại: 355.0215 Military science
• Thông tin xuất bản: Germany : Environmental science and pollution research international , 2025
• Bộ sưu tập: NCBI
• ID: 177210

Tóm tắt

One-step high-pressure and high-temperature direct aqueous mineral carbonation of tailings derived from mining of Platinum Group Metals in South Africa requires a fundamental understanding of the reactivity of the most dominant mineral phases, i.e. pyroxene and plagioclase (66 wt. % and 12 wt. % of the bulk rock respectively) that are typically found in these tailings. The silicate minerals pyroxene and plagioclase were sampled from a pyroxenite footwall mined with the ore-bearing UG2 and from the Merensky Reefs outcropping in the eastern limb of the Bushveld Complex. These pyroxene and plagioclase grains were concentrated by gravity separation from the orthopyroxenite bulk rock and batch-reacted in a sodium chloride (NaCl) brine saturated with pure carbon dioxide (CO