Amin Ahmadpour - National Petrochemical Company,Research and Technology Company, Mahshahr, Iran

In this experimental investigation, the TiO۲ film has been loaded with the clinoptilolite for preparing TiO۲-Clinoptilolite photocatalyst. In order to characterize the surface of composite and its microstructure, scanning electron microscopy (SEM) and powder x-ray diffraction (XRD) have been used. Subsequently, this photocatalyst is utilized for the degradation of Spent Caustic wastewater to determine the photocatalytic efficiency of TiO۲-Clino photocatalyst. Then the photocatalytic degradation of chemical oxygen demand (COD) in a spent caustic wastewater has been optimized by using design of experiment method. This procedure was done in two ways; one in presence of an oxidant agent (H۲O۲) and other with minimizing amount of oxidant. The results show that the maximum degradation efficiency of TiO۲-Clino photocatalyst is ۷۴.۳% and ۷۷.۳% in condition of applying limitation and without concerning limitation for presence of oxidant respectively.

Photocatalyst; Clinoptilolite; Spent Caustic Wastewater; Design of Experiment, Chemical Oxygen Demand