Abstract
The study emphasize on the synthesis of eco-friendly cellulose based magnetic nanocomposite derived from Lens cullnaris husk and Poly Vinyl Alcohol (Fe3O4@LENT/PVA) for the adsorption of Crystal Violet, Methylene Blue and Malachite Green Dye. The structural and functional morphology was determined by SEM-EDAX analysis and FTIR. The crystalline of Fe3O4@LENT/PVA was analyzed by XRD and pore size was determined by BET. The surface area of nanocellulose Fe3O4@LENT/PVA was found to be 22.308m2/g and the pore volume of 0.074cm3/g. The Fe3O4@LENT/PVA nanocomposites show successful adsorption of CV, MB and MG in 120min equilibrium time at pH7 for CV and 8 for MB and MG respectively. The Fe3O4@LENT/PVA nanocomposites was best fitted Langmuir isotherm and follows pseudo 2nd order kinetics with intra particle as rate controlling mechanism. The nanocellulose Fe3O4@LENT/PVA composite shows good monolayer adsorption capacity in the order of CV(357mg/g)>MB(112.35mg/g)>MG(111.11mg/g). Thermodynamic study reveals the process is endothermic and spontaneous in nature with ΔG0 value less than 20KJmol-1 at respective temperatures indicating Physiosorption. The nano-cellulose Fe3O4@LENT/PVA composite can be effectively desorb dyes by 0.1M NaOH. The nanocellulose Fe3O4@LENT/PVA composite proves to be an effective adsorbent showing regeneration ability upto five times for all the dyes.
Published Version
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