Adsorption of Malachite Green using Nitric Acid Activated Bio Adsorbent from Corn Cob Husk

In this paper, exploitation of the Malachite Green (MG) dye to aquatic solutions through nitric acid-activated corn cob husk (CCH) will minimise outlays for biosorbent recovered by the valorization of agro-residues. The key parameters were optimized through batch experiments and gave the highest removal efficiency of 98.13% at pH 5.89, 90 minutes contact time, 20mg/L preliminary concentration and 0.25g/100 mL adsorbent amount, and the adsorption capacity was 16.62mg/g in higher concentrations. The model of adsorption that best fits the equilibrium data was the Langmuir adsorption isotherm (R2 = 0.98), which point to surface assimilation of the same kind proceeding on the monolayer alongside maximum adsorptive power of 101.01mg/g and a desirable separation factor (0 < RL = 1). The process exhibited great ability to treat textile wastewater by exploiting waste valorization to achieve efficient and environmentally friendly dye decolourization.