IN-SITU NIO IMMOBILIZED TIO2 SOLAR CATALYST FOR MINERALIZATION OF ORTHO-CHLOROPHENOL FROM AQUEOUS WASTE UNDER IRRADIATION OF SOLAR AND DARK CONDITION

Abstract

The contamination of water by phenolic compounds is a worldwide environmental problem due to their high toxic nature. In-situ titanium doping with nickel solar catalyst s (Ti-Ni) were developed by sol-gel method which were used for adsorption and photo-catlytic degradation of ortho-chlorophenol from wastewater. Ti-Ni solar catalyst was characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD). The removal of ortho-chlorophenol was explored as a function of change in reaction time, pH and initial concentration (5-300 mg/L) by the presence visible light phases and in absence of light. ortho-chlorophenol removal from water were conducted under batch process. Maximum removal was at pH 6.5.  Under irradiation of solar radiation phase maximum de-contamination of ortho-chlorophenol by Ti-Ni (0.1) solar catalyst was 172 mg.g^-1, which is more effective (10 fold) as compared with parent titanium. The methodology adopted in this study is a step towards developing multi-functional solar catalyst for organic contaminated pollutant de-contamination aquatic environment.