Abstract
Drinking Water Refilling Depot (DAMIU) is one of the most common sources of drinking water. Drinking water quality standards have been regulated in PERMENKES No. 492 Year 2010 concerning Drinking Water Requirements. Drinking water samples were taken at two DAMIU, which using a reverse osmosis process, located in Semarang. The sample contained metal contents (Pb and Fe) that exceeded the quality standards. The Pb metal content ranged from 0,17-0,18 mg/L with a quality standard of 0,01 mg/L and Fe metal content ranged from 0,43-0,48 mg/L with a quality standard of 0,3 mg/L. In this study, to reduce the levels of Pb and Fe metals are using adsorption and ozonation technology. Adsorption was carried out using powdered activated carbon from coconut shell with a particle size of 100 mesh, variations of dose used were 2, 3, 4, and 5 g. The variation of adsorption and ozonation contact time were 20, 40, and 60 minutes. The highest adsorption method efficiency with a 2 g dose and a 60 minutes time, with Pb and Fe levels are 97,2% and 97,0%, respectively. Meanwhile, the highest ozone efficiency was at 60 minutes with Pb and Fe levels of 90,7% and 92,3% respectively.
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