Abstract
Oil spills represent a serious threat for the ecosystem and human health. Materials with high porosity have been proven to be efficient as oil adsorbents. In this paper, new materials based on xanthan, lignin and their esters have been studied. The novelty of the present work consists in the esterification of lignin through an enzymatically catalyzed reaction. Lignin esters were added into a xanthan matrix to obtain adsorbent materials. FTIR, C13 NMR and XPS analyses have confirmed the success of the lignin esterification reaction. Materials based on xanthan, lignin and their esters were obtained. Their mechanical properties were evaluated. The adsorption of altered argan oil and sunflower oil onto the obtained materials was investigated. Experiments were carried out at different amounts of oil. For the kinetic study, measurements at different contact time were also done. It was found that the studied materials retained over 60% of the total oil quantity. Equilibrium data were well fitted to Henry, Langmuir and Harkin-Jura isotherm models.
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