The Spectronic “Genesys 20” Spectrophotometer withwavelength range 325–1100 nm, accuracy ±2.0 nm was usedto measure absorbance at maxof 625 nm. The rate ofphoto-degradation is calculated in percentage with time ofirradiation. Tests were conducted for variables such as pHof sample wastewater, type of catalyst, catalyst dosage andexposure time of UV light.