Enhanced weathering of lizardite-rich sand in seawater: effects of pH and CO₂ pressure on carbonate formation for climate change mitigation
海水中のリザードライト含有砂の促進風化：CO₂圧とpHが炭酸塩形成に及ぼす影響と気候変動緩和への応用 (AI 翻訳)
Arshad Ali, Usman Taura, Sami Al-Khamisi, Zulfiqar Ahmad Rehan, Amrou Al-Alawi, Anas Hamood Al-Rashdi
🤖 gxceed AI 要約
日本語
本研究は、蛇紋岩由来のリザードライト砂を用いた促進風化によるCO₂固定の可能性を実験的に検証した。pHとCO₂圧の条件を変え、アラゴナイトやマグネサイトなどの炭酸塩鉱物の生成を確認した。しかし、pH低下による海洋酸性化の懸念があり、工業廃棄物由来の石灰を混合することで、CO₂固定と酸性化緩和の両立が期待される。
English
This study experimentally investigates enhanced weathering of lizardite-rich sand for CO₂ sequestration, confirming carbonate mineral formation under varying pH and CO₂ pressure. However, pH decline raises ocean acidification concerns, which can be mitigated by adding lime from industrial marble waste, offering dual benefits of carbon mineralization and waste utilization.
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
日本では、ブルーカーボンや海洋を活用したCO₂除去技術への関心が高まっており、本研究成果は海洋環境での促進風化の実用化に向けた基礎データとして有用。また、産業副産物の有効活用は循環経済の観点からも注目される。
In the global GX context
This research contributes to the global discourse on ocean-based carbon dioxide removal (CDR) methods, providing experimental evidence for enhanced weathering as a scalable climate mitigation strategy. It also highlights the trade-off with ocean acidification, informing the design of environmentally safe CDR deployment.
👥 読者別の含意
🔬研究者:Provides experimental data on lizardite weathering kinetics and carbonate formation, useful for modeling ocean-based CDR.
🏢実務担当者:Offers insights for companies exploring carbon removal credits or coastal engineering projects using enhanced weathering.
🏛政策担当者:Informs policy on marine CDR regulation and the potential co-benefits of industrial waste utilization.
📄 Abstract（原文）
Enhanced weathering (EW) of serpentinized peridotites is being investigated as a potential approach for ex situ CO₂ sequestration in both coastal and open-ocean environments. Previous studies on serpentine minerals have provided important insights into their geochemical reactivity, highlighting their preferential dissolution behavior and enhanced weathering potential under natural conditions. This study examines the CO₂ sequestration potential of lizardite-rich sand and evaluates the formation of hydrated and carbonated mineral phases under varying CO₂ conditions. Mineralogical analyses indicate the presence of aragonite, magnesite, and other secondary minerals associated with CO₂ uptake, suggesting successful carbonation. Changes in pH and dissolved inorganic carbon (DIC) point to differing geochemical dynamics under ambient and elevated CO₂ conditions, with acidification observed in both scenarios. While the findings support the feasibility of using lizardite-rich materials for EW-based carbon sequestration, the associated pH decline raises concern about potential ocean acidification. However, incorporating lime derived from industrial marble waste into sand presents a promising approach to mitigate both climate change and ocean acidification. This mixed sand offers dual environmental benefits by facilitating carbon mineralization and promoting the sustainable utilization of industrial by-products, thereby contributing to climate resilience and environmental sustainability. The results underscore the need for careful selection of rock types and operational conditions to ensure both carbon removal efficacy and environmental compatibility. Ongoing work aims to identify optimal materials for sustainable deployment in marine environments.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1007/s11356-026-38071-6first seen 2026-08-12 04:45:02
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