有機酸による鉱山尾鉱の重要金属抽出と炭素固定の二重価値化
Dual Valorization of Mine Tailings for Critical Metal Extraction and Carbon Capture via Organic Acids (原題)
Valentina Prigiobbe, Simona Liguori, Valentina Brombin, Omid Jazani, Chris Paynter
🤖 gxceed AI 要約
日本語
ウォラストナイト質鉱山尾鉱から有機酸（クエン酸・ギ酸・シュウ酸）を用いて重要元素を抽出し、同時にCO2鉱化の可能性を評価した研究。40〜80℃の流通式溶解実験と多鉱物速度論モデルを組み合わせ、ギ酸がカルシウム抽出に特に有効で金属回収とCO2固定の結合を可能にすることを示す。鉱物ごとの速度論モデルが必要という知見は、尾鉱の持続可能な価値化の予測ツールを提供する。
English
This study extracts critical elements from wollastonite-rich mine tailings using organic acids (citric, formic, oxalic) while assessing CO2 mineralization potential. Flow-through dissolution experiments at 40–80 °C validated a multimineral kinetic model; formic acid proved most efficient for calcium, enabling coupled metal recovery and carbon mineralization. The work offers a predictive framework for sustainable tailings valorization, showing mineral-specific kinetics are needed where elements concentrate in distinct phases.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
資源循環とCO2除去を同時に狙う技術は、日本のカーボンリサイクル政策やGX推進における鉱物固定（mineralization）路線と親和性がある。ただし現段階は実験室研究で、SSBJ開示や企業実務への直接的示唆は限定的。
In the global GX context
Enhanced weathering and mineral carbonation are gaining traction in global carbon-removal and CCUS portfolios, and this dual-recovery approach speaks to circular-economy and industrial-decarbonization debates. It adds mechanistic evidence on organic-acid-enhanced extraction relevant to carbon-removal accounting and MRV discussions, though at lab scale.
👥 読者別の含意
🔬研究者:多鉱物溶解速度論モデルと配位子依存速度則の検証手法が、尾鉱価値化・強化風化研究の設計に有用。
🏢実務担当者:鉱山・セメント等の企業が尾鉱を金属回収とCO2固定の両面で活用する際の初期技術評価に参考となる。
🏛政策担当者:炭素除去・資源循環政策の技術オプションとして鉱物炭酸化の可能性を把握する材料になる。
📄 Abstract（原文）
Abstract The growing demand for critical elements (CEs) and carbon removal solutions creates opportunities to valorize mine waste. We investigate the organic acid-enhanced extraction of critical elements from wollastonite-rich tailings while assessing carbon dioxide (CO2) mineralization potential. Tailings were obtained from a mine in New York and contained aluminum, calcium, iron, magnesium, manganese, and titanium in wollastonite, pyroxene, garnet, and feldspar phases. Flow-through dissolution experiments at 40 and 80 °C using citric, formic, and oxalic acids (0.001–0.1 M), coupled with online pH, temperature, and pressure monitoring, were conducted, and the data were used to validate a multimineral kinetic model based on population balance equations, aqueous geochemistry, and ligand-dependent dissolution rate laws. Formic and oxalic acids achieved superior extraction, with formic acid particularly efficient for calcium─enabling coupled CEs recovery and CO2 mineralization. The ligand-promoted rate laws show a kinetic order of 0.5–1 with respect to formate activity for all minerals. Moreover, comparison of the estimated rates with previous works shows up to 1 order of magnitude faster dissolution in the presence of 0.1 M formic acid, reaching a plateau around pH 4 as the formate activity becomes constant. Overall, our multimineral kinetic framework demonstrates that model complexity should match element distribution, with mineral-specific kinetic models required for elements concentrated in distinct phases. In this way, the proposed approach provides a predictive tool to support sustainable tailings valorization.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.est.6c02171first seen 2026-11-12 04:59:46 · last seen 2026-11-13 05:11:15
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。