Degradasi Zat Warna Eriochrome Black-T (EBT) dengan Katalis ZnO-TiO2 menggunakan Metode Sonolisis

— Eriochrome Black-T (EBT) is a dye that is commonly used in the textile industry to dye silk, wool, nylon, and double fiber, as well as in the laboratory to estimate Ca 2+ , Mg 2+ , and Zn 2+ . If EBT dye is discharged into natural waters, it can have a substantial impact on the aquatic environment's photosynthetic activity since its breakdown components, such as naphthoquinone, are carcinogenic. As a result, its presence in drinking and surface water can be fatal. Therefore, the dyestuff is degraded before being released into the environment so that the environmental pollution can be decomposed. The goal of this study is to find the best timing for EBT degradation using the sonolysis method and to add TiO 2 doping to the ZnO catalyst. The absorbance value measured with a UV-Vis spectrophotometer was used to calculate the percentage of EBT dye degradation. The maximum absorbance (max) of EBT was 535.60 nm, which was used to measure absorbance. The results revealed that the best period for EBT degradation was 30 minutes, with an 81.65% degradation rate. The effect of changing the amount of TiO 2 doping produced the best results, with a degradation percentage of 84.30 % at ZnO-TiO 2 10%.