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Abstract
The increase in biorefinery processes underscores the need for effective biofuel generation; nevertheless, inhibitors such as hydroquinone (HQ), 5-hydroxymethylfurfural (HMF), furfural (FF), and vanillin (VAN) resulting from biomass degradation impede microbial growth and process efficiency. Herein, a deep eutectic solvent (DES)-like substance was in-situ generated on the surface of NH2-UiO-66 via a post-synthetic coating process using an amine-functionalized UiO-66 MOF and choline chloride (ChCl). ChCl, selected for its low cost and non-toxic properties as a hydrogen bond acceptor, enabled the formation of the thin layer of pseudo-DES on NH2-UiO-66 under solvent-free, thermal conditions, resulting in the composite material NH2-UiO-66@ pseudo-DES. The Zr6O4(OH)4 nodes and NH2 groups in NH2-UiO-66 are capable of forming robust hydrogen bonds with ChCl, enhancing the stability and functionality of the pseudo-DES coating. Various parameters influencing the removal efficiency, including pH, adsorbent amount, initial inhibitor concentration, and vortex time, were systematically investigated and optimized. Under the optimal conditions, the removal efficiency of HQ, HMF, FF, and VAN was 62.08%, 56.09%, 45.29%, and 83.46% respectively, for a synthetic sample. These values for real samples after hydrolysis and prior to fermentation were exceeded 51.73%, 53.21%, 42.69%, and 37.59%, for HQ, HMF, FF, and VAN, respectively. Inhibitor removal is driven by hydrogen bonding, electrostatic interactions, van der Waals forces, and π-π stacking with the inhibitors. This method demonstrates effective reusability for inhibitor removal up to four cycles. This groundbreaking research is the first of its kind to employ a MOF in conjunction with a pseudo-DES for this purpose; the results are simple, very effective, environmentally friendly, quick to react, and highly selective, making it ideal for biomass hydrolysis purification.
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Authors (6)
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Massoud Kaykhaii
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- Submitted Version
- DOI:
- Digital Object Identifier (open in new tab) 10.34808/fd5h-4y03
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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JOURNAL OF MOLECULAR LIQUIDS
no. 421,
ISSN: 0167-7322 - Language:
- English
- Publication year:
- 2025
- Bibliographic description:
- Honarmandrad Z., Mousavi Khadem S. S., Kucharska K., Kaykhaii M., Łuczak J., Gębicki J.: Enhanced sorption of inhibitory compounds from fermentation broth using a MOF@pseudo-DES composite// JOURNAL OF MOLECULAR LIQUIDS -, (2025), s.126845-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.molliq.2025.126845
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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