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Batch And Fixed-Bed Adsorption Studies of 2,4-Dichlorophenoxyacetic Acid Pesticide from Aqueous Solution using Coconut Activated Carbon

J. M. Salman, F. M. Abd and A. A Muhammed

Adsorption study of 2,4-dichlorophenoxyacetic acid (2,4-D) from aqueous solution using commercial coconut activated carbon (CAC) as adsorb ent has been carried out in batch experiments revealed that the equilibrium data were fitted to Langmuir, Freundlich and Temkin isotherm models and were found to be best represented by the Langmuir isotherm model; with maximum monolayer adsorption capacity of 300 mg/g at 30°C when the initial concentration was 50–300 mg/L. At the same time a fixed- bed adsorption study of 2,4-D from aqueous solution using CAC as adsorbent has been achieved using fixed-bed column where the effects of important factor s such as the initial 2,4-D concentration, flow rate and bed height on the breakthrough characteristics of the adsorption system were evaluated. The results obtained confirmed that the breakthrough curves were dependent on initial pesticide concentrations, flow rate and bed height with the highest bed capacity of 50 mg/g at 150 mg/L initial 2, 4-D concentration, 10 mL/min flow rate and.3 mm bed height