UJI AKTIVITAS FOTOKATALITIK MnO2/ABU LAYANG DALAM MENDEGRADASI ZAT WARNA METILEN BIRU

Abstract

Water pollutions due to dye effluents has been considered a major environmental issue. Dyes usually have very complex structures, thus are difficult to degrade by biological processes. Photocatatalytic method has been effectively applied for the degradation of dyes from an aqueous solution. In this study, the composite was studied and has been reported a better material than a single counterpart for the degradation of organic wastes. The composite MnO2/fly was used as a photocatalyst for the degradation of methylene blue (MB). The material was prepared by one-pot synthesis using sol-gel method. The degradation of MB was achieved at pH 5, 7 and 9. The results indicated that the composites are able to significantly degrade methylene blue at both pH applied (acid or base environment). Using the optimum condition, the maximum degradation of MB was 99.81% obtained when 30 mg of composite, 50 ppm MB for 120 minutes of degradation time were applied in this experiment.