Stability and Kinetic Study of Immobilized Carbonic anhydrase into PVDF Membrane
PVDF膜に固定化された炭酸脱水酵素の安定性と速度論的研究 (AI 翻訳)
Siti Nadia, Abdullah, Fazlena Hamzah, Nursyuhani Che Husain, Harumi Veny, Miradatul Najwa, M. Rodhi, Nur Atikah Mohidem, D. Ariyanti
🤖 gxceed AI 要約
日本語
本研究は、CO2鉱化プロセス向けに炭酸脱水酵素（CA）をPVDF膜に固定化し、その安定性と反応速度を評価した。固定化酵素は遊離酵素に比べて熱・pH安定性が向上し、ミカエリス定数Km=7.45 mmol/Lと高い基質親和性を示した。走査型電子顕微鏡で均一な酵素分布を確認。膜固定化CAの安定性-速度論関係の定量的知見を提供し、将来の酵素支援CO2鉱化システムの基盤を確立した。
English
This study immobilizes carbonic anhydrase (CA) onto PVDF membranes for CO2 mineralization. The immobilized enzyme shows enhanced thermal and pH stability, with a low Michaelis constant (7.45 mmol/L) indicating strong substrate affinity. SEM confirms homogeneous enzyme distribution. The work provides quantitative insights into stability-kinetics relationships, establishing a baseline for advanced enzyme-assisted CO2 capture systems.
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
日本のGX実現にはCCUS技術の実用化が不可欠であり、本研究成果は酵素膜を利用した低コストCO2回収・鉱化技術の基盤となる。特に、安定性向上と反応速度論の定量評価は、産業規模での応用に向けた設計指針を提供する。
In the global GX context
In the global GX context, enzyme-assisted carbon capture and mineralization is emerging as a low-energy alternative to amine scrubbing. This work advances the understanding of immobilized CA stability and kinetics, which is critical for scalable membrane contactor systems. The quantitative kinetic parameters offer a benchmark for further process optimization in CCUS.
👥 読者別の含意
🔬研究者:Provides quantitative kinetic parameters and stability data for immobilized CA, useful for designing enzyme-based CCUS systems.
🏢実務担当者:Offers insights into membrane immobilization strategy for CO2 mineralization, but requires further validation for industrial scale.
📄 Abstract（原文）
Carbonic anhydrase (CA) is a highly efficient biocatalyst for accelerating CO₂ hydration and has attracted significant interest for enzyme-assisted carbon mineralization and post-combustion CO₂ capture. However, the practical deployment of CA is hindered by its limited stability and non-recyclability under industrially relevant conditions. In this study, CA was immobilized onto a hydrophobic poly(vinylidene fluoride) (PVDF) membrane via glutaraldehyde-mediated covalent crosslinking to develop a robust enzymatic membrane platform for CO₂ mineralization applications. The immobilized enzyme showed greater enhanced thermal and pH stability than free CA, demonstrating improved resilience under conditions relevant to mineral carbonation processes. Enzymatic kinetics were systematically evaluated using p-nitrophenyl acetate as a model substrate, revealing a low apparent Michaelis constant (Km = 7.45 mmol L⁻¹) and a maximum reaction rate (Vm = 0.76 µmol min⁻¹), indicative of strong enzyme–substrate affinity within the membrane-confined microenvironment. Scanning electron microscopy confirmed homogeneous enzyme distribution and stable attachment within the PVDF pore structure. While employing a conventional immobilization strategy, this work provides quantitative insight into the stability–kinetics relationship of membrane-immobilized CA. It establishes a baseline membrane architecture for future development of advanced enzyme-assisted CO₂ mineralization and membrane contactor systems.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.22146/ajche.17764first seen 2026-05-15 20:50:10
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