Fig. 6 shows the removal of HA and DOC from the river water
with each PAC dosage. This method displayed high removal even at
30 mg/L of PAC. and low removal with NaOH.The higher the dosage of PAC,The lowest residual DOC concentration of
4.5 mg-C/L, which is lower than the water quality standards for
drinking water in Indonesia, was obtained with 70 mg/L of PAC.