The problem of fisheries waste has increased in recent years and has become a global problem influenced by various biological, technical, operational and socioeconomic factors. In this context, the use of these residues as raw materials is a proven approach not only to reduce the crisis of unprecedented magnitude facing the oceans, but also to improve the management of marine resources and increase the competitiveness of the fisheries sector. However, the implementation of valorization strategies at the industrial level is being excessively slow, despite this great potential. Chitosan, a biopolymer extracted from shellfish waste, is a clear example of this because although countless chitosan-based products have been described for a wide variety of applications, commercial products are still limited. To address this drawback, it is essential to consolidate a "bluer" chitosan valorization cycle towards sustainability and circular economy. In this perspective we wanted to focus on the cycle of valorization of chitin, which allows to transform a waste product (chitin) into a material suitable for the development of useful products to solve the source of its origin as a waste product and pollutant; chitosan-based membranes for wastewater remediation.
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http://dx.doi.org/10.1016/j.carbpol.2023.120674 | DOI Listing |
Int J Biol Macromol
December 2024
Department of Agricultural Science, University of Naples, via Università, 100, Portici 80055, Italy; Centro Interdipartimentale di Ricerca per la Risonanza Magnetica Nucleare per l'Ambiente, l'Agroalimentare, ed i Nuovi Materiali (CERMANU), Università di Napoli Federico II, Via Università 100, 80055 Portici, Italy.
Coffee husks have been valorised by isolating humic materials before (HLS-Raw) or after (HS-Comp) composting them. Such substrates were reacted with chitosan at different ratios to synthesize novel nanoparticles (NP) with radical scavenging properties. Size and antioxidant activity of nanomaterials increased at higher HS/chitosan ratio, while zeta potential decreased.
View Article and Find Full Text PDFChem Commun (Camb)
December 2024
China-UK Low Carbon College, Shanghai Jiao Tong University, 3 Yinlian Road, Shanghai, China.
Chitin is the most abundant nitrogen-containing biomass on Earth and presents a compelling alternative to fossil fuels for chemical production. The catalytic conversion of chitin offers a viable approach for harnessing its inherent carbon and nitrogen contents, contributing to developing a green and sustainable society. This feature article reviews recent advances in shell waste biorefinery, with an emphasis on the contributions from our group.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Interdisciplinary Laboratory in Bio-Resources, Environment and Materials, Higher Normal School, Cadi Ayyad University, 40000 Marrakech, Morocco.
Sustainably exploiting the waste of the black soldier fly (BSF) to produce chitin and chitosan remains a challenge. This work valorizes the pupal cases of BSF for chitin and chitosan extraction. Four chemical extraction processes have been employed.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Laboratory of Materials Engineering for the Environment and Valorization (GeMEV), Faculty of Sciences Aïn Chock, Hassan II University of Casablanca, 5366 Casablanca, Morocco. Electronic address:
Active films based on polyvinyl alcohol (PVA) and chitosan (CS) were developed by encapsulating chamomile essential oil using an emulsification process, followed by adsorption onto activated carbon (AC) to stabilize the oil droplets. Microscopic analysis showed that the average size of the micelles was between 0.1 μm and 1.
View Article and Find Full Text PDFNaunyn Schmiedebergs Arch Pharmacol
October 2024
Laboratory of Biotechnology and Natural Resources Valorization, Faculty of Sciences, Ibn Zohr University, 80060, Agadir, Morocco.
The study undertakes the development of an atorvastatin-loaded self-nanoemulsifying drug delivery system (SNEDDS) to improve its bioavailability. The SNEDDS were fabricated using oleic acid, Tween 80, and Span 80 by spontaneous emulsification. The SNEDDS were assessed for their particle size distribution, zeta potential, morphology, drug content, surface tension, viscosity, and drug release.
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