Photocatalytic Oxidation of Organic Pollutants

摘要

The photooxidation of phenol in aqueous solution with several catalysts was studied in a batch-recycle reactor at 65C and atmospheric pressure. The tubular reactor was irradiated with a polychromatic ultraviolet lamp located at a focus of an elliptical reflector. Different metal nitrate salts were used as catalysts, including nickel nitrate, cobalt nitrate, ferric nitrate, manganese nitrate, cerium nitrate and lanthanum nitrate. Liquid samples from the photoreactor were analyzed by gas chromatography for phenol concentration. The presence of cations of catalysts were determined by ultraviolet spectroscopy. The ferric nitrate was the most active catalyst. The initial rate of phenol decomposition was in first order with respect to phenol concentration for all catalysts.