Adsorption Study on Mixture Material of Granite Residual Soil – Palm Oil Fuel Ash (POFA)

摘要

Granite residual soil mixed with up to 15% of palm oil fuel ash (POFA) by dry weight was investigated to ascertain its adsorption capacity with regards to its use as an adsorbent material for leachate. A batch equilibrium adsorption study was carried out in which the effect of dosage and pH on the adsorption capacity of granite residual soil – POFA mixture was determined. In general, the results showed that adsorbent dosage and pH had significant effect on the sorption capacity of the soil – POFA mixture. Such as example, Manganese ion which had the highest initial concentration of 18.23 mg/l in leachate, once gone through the shaking process, the amount which had been adsorbed by the admixture increased from 22.92 mg/g at 0% POFA content to 30.32 mg/g at 15% POFA. The increased pattern of adsorption capacity of the admixtures occurred with the increment of pH values. The optimum condition for the effectiveness sorption of contaminant for the mixture is 15% POFA content and pH values is 6. It can be concluded that the mixture granite residual soil–POFA is expected to be an economical adsorbent product for metal ion remediation in leachate.