Enhanced coagulation of humic acid using powdered activated carbon with polyaluminium chloride / Nurul Farhana Mohemed Rashid

This study aimed to determine the optimization conditions for powdered activated carbon as an enhancer of humic acid coagulation in water with polyaluminium chloride (PAC) as a coagulant. This is because powdered activated carbon helps in a better result to remove of natural organic matter (NOM) with its adsorption qualities. This study focused on the effect of powdered activated carbon dosage to the coagulation of humic acid, the effect of pH to the coagulation of humic acid and effect of volume on the coagulation of humic acid. Appearance colour (Pt CO), true colour (Pt CO) and total suspended solids (mg/L) are taken by using jar test. The optimum dosage of powdered activated carbon for humic acid coagulation is 40 mg and the optimal pH for humic acid coagulation is pH 7 since it shows the highest percentage of humic acid removal, by using 1 mL polyaluminium chloride as a coagulant and 40 mg powdered activated carbon as an enhancer. The optimum volume in this study was 600 mL, by mixing 40 mg of powdered activated carbon with 1 mL of coagulant in test water at pH 7.