A series of studies have been conducted on the removal of the basic, and acid dyestuffs malachite green and acid red 8 using polyethylene/ monomrillonite/ nano-composite. Waste polyethylene was collected from green house as an adsorbent. The batch adsorption experiments were conducted under various operating parameters like initial dye concentration, adsorbent dose, pH and temperature. The equilibrium data fitted well to the Freundlich isotherm equation. The adsorption efficiency, adsorption energy, adsorption capacity, intensity of adsorption is calculated. The experimental data fitted very well with second order kinetic model suggesting chemisorption. Significant effect on adsorption was observed on varying the pH. Thermodynamic parameters such as ΔH, ΔS, and ΔG were evaluated. The positive ΔH value and pH dependent results suggest that the adsorption dyes involves physisorption mechanism.
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