| Title: |
From Corncob By-Product to Functional Lignins: Comparative Analysis of Alkaline and Organosolv Extraction Followed by Laccase Treatment |
| Authors: |
Martin, Elise; Agnihotri, Swarnima; Audonnet, Fabrice; Record, Eric; Dubessay, Pascal; Taherzadeh, Mohammad, J; Michaud, Philippe |
| Contributors: |
Laboratoire de Géographie et d'Aménagement de Montpellier (LAGAM); Université Paul-Valéry - Montpellier 3 (UPVM); Environnement, Ville, Société (EVS); École normale supérieure de Lyon (ENS de Lyon); Université de Lyon-Université de Lyon-École des Mines de Saint-Étienne (Mines Saint-Étienne MSE); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-Université Lumière - Lyon 2 (UL2)-Université Jean Moulin - Lyon 3 (UJML); Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon); Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-École Nationale des Travaux Publics de l'État (ENTPE)-École nationale supérieure d'architecture de Lyon (ENSAL)-Centre National de la Recherche Scientifique (CNRS)-Approches Littéraires, Linguistiques et Historiques des Sources (ALLHiS); Université Jean Monnet - Saint-Étienne (UJM)-Université Jean Monnet - Saint-Étienne (UJM); Institut Pascal (IP); Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne); Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA); SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS); Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS); Biodiversité et Biotechnologie Fongiques (BBF); Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE); Génie des Procédés, Energétique et Biosystèmes (GePEB); SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) |
| Source: |
ISSN: 2218-273X ; Biomolecules ; https://hal.inrae.fr/hal-05290621 ; Biomolecules, 2025, 15 (9), pp.1226. ⟨10.3390/biom15091226⟩. |
| Publisher Information: |
CCSD; MDPI |
| Publication Year: |
2025 |
| Collection: |
Université Jean Monnet – Saint-Etienne: HAL |
| Subject Terms: |
Pycnoporus cinnabarinus; laccases; corncob; extraction; lignin; [SPI]Engineering Sciences [physics] |
| Description: |
International audience ; Corncobs, produced globally at over 200 million tons annually with 11-18% lignin content, represent an abundant and underexploited lignocellulosic resource for sustainable lignin valorization. In this study, two distinct extraction methodologies, alkaline treatment using sodium hydroxide and an organosolv process with a 50:50 ethanol/water mixture, were systematically compared for their efficiency in isolating lignin from corncobs. Both protocols achieved high yields, up to 82% for alkaline and 84% for organosolv extraction under optimized conditions. The resulting lignins displayed notable differences in chemical structure and physical properties, as revealed by spectroscopic and thermal analyses, highlighting their divergent potential for downstream applications. To evaluate the suitability of these lignins to biocatalytic upgrading, post-extraction enzymatic treatment was performed using Pycnoporus cinnabarinus laccase (EC 1.10.3.2). Significant structural modifications were observed in alkaline-extracted lignin, as determined by FTIR spectroscopy, while organosolv lignin remained largely unaltered, a difference attributed to its lower aqueous solubility at the enzyme's optimal pH. These results demonstrate the critical impact of extraction conditions on lignin reactivity and suitability for enzymatic tailoring. This work underscores the potential for holistic corncob valorization within integrated biorefinery frameworks. Selective extraction and targeted enzymatic modification not only facilitate efficient by-product utilization but also expand the prospects for producing versatile bio-based materials, thereby advancing the transition toward a sustainable, circular bioeconomy. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| ISBN: |
978-0-01-580375-9; 0-01-580375-9 |
| Relation: |
info:eu-repo/semantics/altIdentifier/pmid/41008533; PUBMED: 41008533; WOS: 001580375900001 |
| DOI: |
10.3390/biom15091226 |
| Availability: |
https://hal.inrae.fr/hal-05290621; https://hal.inrae.fr/hal-05290621v1/document; https://hal.inrae.fr/hal-05290621v1/file/BiomoleculesMartin2025.pdf; https://doi.org/10.3390/biom15091226 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.8128A486 |
| Database: |
BASE |