Elaboration des précurseurs non conventionnels en charbon actif à base des déchets agroalimentaires dopés par un sel métallique : utilisation au traitement des eau

Abstract

The growing demand for adsorbents used in environmental protection processes has made their cost more and more expensive, which prompts additional research for the manufacture of new, less expensive adsorbent materials, specifically from biomass. The objective of this work is to develop new materials based on charcoal from agrofood waste, which are orange peelings and artichoke leaves, and to test their adsorption affinities towards organic pollutants (the crystal violet and ketoprofen), and to model the adsorption process of these substances by the prepared materials. These tests were in synthetic solutions of distilled water. For this, a series of activated carbons made from orange peels and artichoke leaves were produced by chemical activation with zinc chloride. The supports prepared were characterized by several analyzes such as: pHpzc, IRTF, Id, Iphenol, IBM. The adsorption kinetics results showed that after 30 minutes the adsorption capacity of the treated orange reached 87% for CV and ketoprofen by 96%. So from the results we can say that the elimination of these pollutants is interesting in an acidic environment for treated orange peels, unlike artichoke leaves. The application of an experimental design (full factorial for ketoprofen and Box Behnken for CV) confirms the previous results.