ANALISIS PENGARUH DOSIS ADSORBEN ARANG AKTIF SEKAM PADI PADA ADSORPSI LOGAM KADMIUM (CD) DARI LIMBAH CAIR SASIRANGAN

Abstract

Sasirangan production generates liquid waste containing dangerous heavy metals, one of them is cadmium (Cd). One way to overcome pollution caused by Cd metals produced from sasirangan wastewater is by the adsorption process. This study aims to determine the effect of activated carbon adsorbent doses from rice husk in the ability to absorb Cd metals from sasirangan industrial wastewater. The research was conducted in three stages. First was the manufacture of adsorbents. The second step was chemical-physical activation and the third was testing the ability of activated charcoal from rice husk to adsorb Cd metals with variations in the adsorbent dose of 2 gr, 4gr, and 6 gr. The chemical activation process was carried out by the addition of the chemical compound HCl. Furthermore, activated physically in the furnace for 45 minutes at temperature of 4500C. The higher the dose of activated charcoal, the lower the ability of activated charcoal from rice husk to adsorb Cd metal. It is caused by condition that the more active charcoal dose is used, the solution will be at the saturation point. The most concentration decrease in activated charcoal occurs at a dose of 2 gr (0.018 mg/L) and the least concentration decrease at a dose of 6 gr (0.052 mg/L).