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Enzymatic crosslinking of lignin nanoparticles and nanocellulose in cryogels improves adsorption of pharmaceutical pollutants
VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 VTT, Finland, P.O. Box 1000; Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, P.O. Box 66, FI-00014, Helsinki, Finland, P.O. Box 66.
Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, P.O. Box 66, FI-00014, Helsinki, Finland, P.O. Box 66.
Department of Chemistry, Faculty of Science, University of Helsinki, P.O. Box 55, FI-00014, Helsinki, Finland, P.O. Box 55.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Biocomposites. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0002-2984-7702
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2024 (English)In: International Journal of Biological Macromolecules, ISSN 0141-8130, E-ISSN 1879-0003, Vol. 266, article id 131168Article in journal (Refereed) Published
Abstract [en]

Pharmaceuticals, designed for treating diseases, ironically endanger humans and aquatic ecosystems as pollutants. Adsorption-based wastewater treatment could address this problem, however, creating efficient adsorbents remains a challenge. Recent efforts have shifted towards sustainable bio-based adsorbents. Here, cryogels from lignin-containing cellulose nanofibrils (LCNF) and lignin nanoparticles (LNPs) were explored as pharmaceuticals adsorbents. An enzyme-based approach using laccase was used for crosslinking instead of fossil-based chemical modification. The impact of laccase treatment on LNPs alone produced surface-crosslinked water-insoluble LNPs with preserved morphology and a hemicellulose-rich, water-soluble LNP fraction. The water-insoluble LNPs displayed a significant increase in adsorption capacity, up to 140 % and 400 % for neutral and cationic drugs, respectively. The crosslinked cryogel prepared by one-pot incubation of LNPs, LCNF and laccase showed significantly higher adsorption capacities for various pharmaceuticals in a multi-component system than pure LCNF or unmodified cryogels. The crosslinking minimized the leaching of LNPs in water, signifying enhanced binding between LNPs and LCNF. In real wastewater, the laccase-modified cryogel displayed 8–44 % removal for cationic pharmaceuticals. Overall, laccase treatment facilitated the production of bio-based adsorbents by improving the deposition of LNPs to LCNF. Finally, this work introduces a sustainable approach for engineering adsorbents, while aligning with global sustainability goals.

Place, publisher, year, edition, pages
Elsevier BV , 2024. Vol. 266, article id 131168
Keywords [en]
Adsorbents, Laccase, Lignin nanoparticles, Lignin-containing cellulose nanofibrils, Pharmaceutical pollutants, Wastewater treatment
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-345732DOI: 10.1016/j.ijbiomac.2024.131168ISI: 001220099600001PubMedID: 38552694Scopus ID: 2-s2.0-85189552287OAI: oai:DiVA.org:kth-345732DiVA, id: diva2:1852508
Note

QC 20240524

Available from: 2024-04-18 Created: 2024-04-18 Last updated: 2024-05-24Bibliographically approved

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Oliaei, Erfan

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