Extraction and Use of Lignin for Membrane Properties Modification

This study aimed to valorize oasis wastes by the extraction of lignin and its use for polymeric membrane modification. We have extracted lignin from five types of oasis wastes using the Klason method. These wastes are date palm stone, leaflet, pedicel, palm frond, and fibrilium. After extraction, the mass yield of lignin production was in the range of 22–32%. The date palm frond showed the highest lignin production yield. The produced lignin was characterized by using FT-IR spectroscopy. The obtained spectra showed that all samples contain a high concentration of (–OH) group except pedicel and fibrilium samples which present a moderate intensity peak of this group. In this study, we demonstrated that, for all extracted lignins, the hydrophilicity and porosity of polymeric membranes went up with the lignin content rise.