Water pollution is a major concern in most developing nations which are dealing with a severe issue having significant influences on human health, environment and aquatic systems. According to the World Health Organization (WHO), half of the world's population will be living in water-stressed areas by 2025 (WHO/UNICEF, 2019)1. Among the different techniques explored, water purification through adsorption has emerged as a suitable alternative for the removal of toxic molecules2. Thanks to its abundance in nature, its non-toxicity and its biodegradability, cellulose and its derivatives constitute a promising adsorbent material for this type of applications. Within this panorama, an adsorbent material based on oxidized cellulose nanofibrils (TEMPO-CNF) has been prepared by chemical functionalization with benzylamine for the adsorption of two model molecules, methylene blue (MB) and chlorhexidine digluconate (CHX). The material obtained appears to be efficient, with a maximum absorption of MB equal to 120 mg/g and CHX equal to 292 mg/g, easily recoverable, washable and reusable (Fig. 1). Finally, the bio fragmentation of the material was studied to evaluate the possible effects of the chemical graft on the fibers.

Surface amidated TEMPO-CNF films for dyes and drugs adsorption

Domenico Santandrea;
2024

Abstract

Water pollution is a major concern in most developing nations which are dealing with a severe issue having significant influences on human health, environment and aquatic systems. According to the World Health Organization (WHO), half of the world's population will be living in water-stressed areas by 2025 (WHO/UNICEF, 2019)1. Among the different techniques explored, water purification through adsorption has emerged as a suitable alternative for the removal of toxic molecules2. Thanks to its abundance in nature, its non-toxicity and its biodegradability, cellulose and its derivatives constitute a promising adsorbent material for this type of applications. Within this panorama, an adsorbent material based on oxidized cellulose nanofibrils (TEMPO-CNF) has been prepared by chemical functionalization with benzylamine for the adsorption of two model molecules, methylene blue (MB) and chlorhexidine digluconate (CHX). The material obtained appears to be efficient, with a maximum absorption of MB equal to 120 mg/g and CHX equal to 292 mg/g, easily recoverable, washable and reusable (Fig. 1). Finally, the bio fragmentation of the material was studied to evaluate the possible effects of the chemical graft on the fibers.
2024
978-88-94952-50-6
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11591/549784
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