Abstract
Our study is located on the cellulosic part of Opuntia Ficus Indica seed's residue. The extracted cellulose was dissolved in NaOH/urea solution and then we used the epichlorohydrin as crosslink reagent, to obtain the cellulose-based hydrogel. The structure of the extracted cellulose and synthetized hydrogel was determined using Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction analysis (XRD) also scanning electron microscopy (SEM) for a better understanding of the morphology of the synthetized hydrogel. The hydrogel has shown an interesting methylene blue dye adsorption and removal capacity up to 83% using an optimal adsorbent dose m=0.5g at an ambient temperature T=25˚C, the solution concentration 10ppm at a pH=6.5 for 70min. This study confirmed the potentials of using hydrogels in water treatment as a biological support for their extracting properties, respecting the environment, as well as their renewability and their biodegradability.
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