STUDI PERBANDINGAN EFEK FOTOKATALISIS Fe2O3-TiO2 HASIL EKSTRAKSI ILMENIT BANGKA DAN P-25 DEGUSSA UNTUK APLIKASI PENGOLAHAN LIMBAH CAIR TPA CILOWONG[The Photocatalytic Effect of P-25 Degussa and Fe2O3-TiO2 Derived from Bangka- Indonesia Ilmenite Extraction for Waste Water Treatment of Leachate on the Landfill Cilowong]

Abstract

The current work presents the results of investigation on the decreasing levels of BOD5, COD, TDS of leachate on the landfill (TPA) Cilowong by using Fe2O3-TiO2 catalyst derived from the extraction process of Bangka Indonesia ilmenite as well as commercial TiO2 P-25 Degussa catalysts. The measurement was carried out in a photocatalytic reactor of 30 x 15 x 20 cm equipped with a 50 watt UV radiation. The process was performed for 90 minutes at room temperature, and the samples were taken every 15 min for BOD, COD, and TDS analyses. The ratio of leachate to H2O (%v) was varied as 1/4; 1/8; 1/12 and 1/16, with the amount of catalyst used was 1 gram. The result on ratio of leachate to H2O of 1/16 showed the decrease in BOD5, COD, TDS with the use of Fe2O3-TiO2 catalysts by 45; 90.43 and 100% for Fe2O3-TiO2 catalysts, while with the use of Degussa P-25 TiO2 catalysts the decrease in BOD5, COD, TDS reached by 80.6; 75 and 100%, respectively. On the basis of findings, it is shown that Ilmenite Bangka Indonesia has great potential as a raw material for synthesizing the Fe2O3-TiO2 catalysts.