Equilibrium Modelling, Thermodynamic and Kinetic Studies on the Bio Sorption of Malachite Green Dye by a Low Cost Effective Adenanthera Pavonina Leaves Activated Carbon

The aim of the current work is to investigate the applicability of raw Adenanthera Pavonina Leaves Activated Carbon (APLAC) for the removal of Malachite Green (MG) in aqueous solution. The adsorption of Malachite Green (MG) on APLAC adsorbent was studied as a function of APLAC dose (0.2–1g), initial concentration (10–70mg/L), pH 4–9 solutions, and a varying contact time(30-150)minutes and temperature(298-328)K. The effect of these parameters on the adsorption capacity was investigated using a batch process. The experimental data were fitted to Langmuir, Temkin and Freundlich adsorption models and were found to coincide Freundlich adsorption isotherm. Kinetic data were fitted to the pseudo-first-order and pseudo second-order models, and were found to follow pseudosecond-order kinetic model. The Characterization of the APLAC adsorbent was achieved by FT-IR, UV and SEM techniques. This study reveals that APLAC is eco benign and has a very good dye uptake property and can be best used as low cost and effective adsorbent in removing the environmentally polluting dyes.