Abstract
The physicochemical characteristics and adsorption efficiencies of the activated carbons prepared from banana peels and coconut shell were evaluated using physical activation method. Phosphoric acid (H<sub>3</sub>PO<sub>4</sub>) was used as an activating agent. The physicochemical characteristics (IAN, pH, attrition, porosity, titratable surface functional groups, bulk density, moisture and ash content) were determined using standard analytical procedures and the adsorption efficiencies were evaluated through batch adsorption studies using aqueous solution of Safranin-O dye as adsorbate. The results revealed that the physicochemical parameters played a vital role in the adsorption performance of the two adsorbents and contributed majorly to their differences in the adsorption efficiency. The batch adsorption process was carried out by varying initial dye concentration, pH, adsorbent dosage and contact time. CSAC was found to be better adsorbent than BPAC as it recorded higher percentage of Safranin-O dye removal under all the experimental conditions.
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