| Title |
Low Environmental Impact Magnetic Chitosan and Chitin Cryogels for PFAS Remediation |
| ID_Doc |
13797 |
| Authors |
García-Castrillo, M; Barandika, G; Lizundia, E |
| Title |
Low Environmental Impact Magnetic Chitosan and Chitin Cryogels for PFAS Remediation |
| Year |
2024 |
| Published |
|
| DOI |
10.1002/adfm.202405298 |
| Abstract |
Polymers derived from renewable carbon feedstock are destined to play a pivotal role in the transition to a sustainable circular economy, displacing conventional fossil-carbon materials. Chitin (CT) and chitosan (CS) are well-suited to develop multifunctional materials that are mechanically resilient and easy to process. Their abundance of hydroxyl and amine groups facilitates hydrogen bonding and electrostatic interactions, making them suitable for persistent pollutant removal from drinking water. Therefore, porous CS cryogels are fabricated by dissolution in acetic acid, coagulation, and subsequent freeze-drying. To enhance durability in harsh environments, CT cryogels are obtained through acetylation. Furthermore, Fe3O4 nanoparticles are incorporated to enable removal by external magnetic fields. The rapid removal of per- and polyfluoroalkyl substances (PFASs) with capacities reaching 451 mg g-1 offers competitive performance against state-of-the-art materials. The shear-thinning properties of CS enable rapid additive manufacturing in predetermined free-standing shapes, useful for accessing sites with complex geometries. Life cycle assessment (LCA) confirms the suitability of chitosan and CT cryogels for low environmental impact water remediation applications. Furthermore, the cryogels can be recycled, closing the material loops back into the economic cycle. Altogether, this work demonstrates the potential of chitosan and CT as competitive alternatives to fossil-carbon derived systems for sustainable environmental remediation. Magnetically active chitosan and chitin cryogels are fabricated by simple dissolution, coagulation, lyophilization, and acetylation. The cryogels demonstrate competitive performance in the remediation of per- and polyfluoroalkyl substances. The material has low environmental impacts and is sufficiently versatile to enable its additive manufacturing and recycling, providing novel avenues for the application of biobased and circular materials in sustainable water purification. image |
| Author Keywords |
chitin; chitosan; life cycle assessment; PFAS; water remediation |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001241933500001 |
| WoS Category |
Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter |
| Research Area |
Chemistry; Science & Technology - Other Topics; Materials Science; Physics |
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