Carbide Slag Decontamination and Mineralization: A Circular Economy Approach to High-Purity CaCO3 and CO2 Storage
カーバイドスラグの除染と鉱化：高純度CaCO3とCO2貯蔵への循環経済アプローチ (AI 翻訳)
Huaigang Cheng, Ruirui Hou, Yanli Wang, Bo Wang, Zhuohui Ma, Jincai Zhang
🤖 gxceed AI 要約
日本語
アセチレン生産時の廃棄物であるカーバイドスラグを物理処理（焼成、磁選、沈降）で精製し、CO2鉱化により高純度CaCO3を生成するプロセスを開発。酸・アルカリ不使用で二次汚染を回避し、CO2固定と廃棄物有効利用を両立。SDG12・13に貢献するスケーラブルな手法を提示。
English
This study develops an integrated physical decontamination and mineralization process for calcium carbide slag, a highly alkaline solid waste from acetylene production. Through calcination, magnetic separation, sedimentation, and CO2 mineralization, it achieves high-purity CaCO3 (97.88%) and permanent CO2 storage without using acids or alkalis, avoiding secondary pollution. The approach supports circular economy and climate action (SDG 12, 13).
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
日本でもカーバイドスラグは発生し、その処理とCO2削減は課題。本プロセスは物理処理のみで高純度CaCO3とCO2固定を両立し、日本の化学産業や廃棄物処理業界に応用可能。特にCCUSとサーキュラーエコノミーの政策文脈で価値が高い。
In the global GX context
This paper presents a scalable, low-impact method for alkaline solid waste valorization and CO2 mineralization, relevant to global CCUS and circular economy targets. The process avoids chemical additives, enhancing environmental compatibility. It offers a practical pathway for industries generating similar wastes (e.g., steel, cement) to reduce emissions and produce valuable materials.
👥 読者別の含意
🔬研究者:Provides a novel integrated process for waste-derived CO2 mineralization and high-purity CaCO3 production, relevant for CCUS and circular economy research.
🏢実務担当者:Chemical plants with carbide slag waste can adopt this low-cost, chemical-free process to reduce waste and produce marketable CaCO3 while storing CO2.
🏛政策担当者:Demonstrates a tangible technology for achieving circular economy and climate goals (SDG 12, 13), supporting policy on industrial waste valorization and carbon removal.
📄 Abstract（原文）
Calcium carbide slag is a highly alkaline solid waste generated during acetylene production, but its long-term accumulation causes land occupation and persistent environmental risks such as soil alkalinization and water pollution. To support circular economy and carbon emission reduction goals, in this study, we develop an integrated physical decontamination–mineralization process combining calcination, magnetic separation, sedimentation, and CO2 mineralization. After calcination, magnetic separation, and 8 h of gravity sedimentation, the removal efficiency of Si reaches about 67% (residual Si content reduces to 0.43%), while those of Fe and Al are 75.4% and 74.2%, respectively. The purified calcium-rich slurry is then used for CO2 mineralization. Under a solid-to-liquid ratio of 10% and a CO2 flow rate of 0.4 L/min, CO2 is fixed as carbonate solids, yielding calcite-type CaCO3 with 97.88% ± 0.35% purity. This process is centered on physical separation and uses no acids, alkalis, or ammonium salts, avoiding secondary pollution while achieving waste valorization and permanent CO2 sequestration. In this study, we provide a scalable, low-impact pathway for alkaline solid waste valorization and carbon emission reduction, contributing to sustainable consumption and production (SDG 12) and climate action (SDG 13).
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/su18105206first seen 2026-07-02 06:25:51
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