Study On Supercritical Water Oxidation Of 2-Naphthol Wastewater

2-naphthol, as a harmful pollutant, has seriously affected on human health. It is difficult to completely decompose 2-naphthol by traditional wastewater treatments. Supercritical water oxidation(SCWO)is the promising technology for the treatment of organic-contained wastewater. In this paper, the supercritical water oxidation of 2-naphthol was investigated.In this thesis, the effects of temperature, pressure, and residence time on the decomposition of 2-naphthol were investigated. The removal rate of 2-naphthol was increased with the raising of the three factors. Comparison of Cu2+ and Mn2+ on the 2-naphthol degradation in, Cu2+ has a better catalytic efficiency. Then, we had some research experiments with the homogeneous catalyst Cu2+. Under these conditions, appropriate conditions in this experimental system were determined.The catalytic decomposition mechanism was investigated by means of LC-MS. The main intermediate products detected were:1-2naphthoquinone, phthalic acid, benzoic acid, benzene, phenol, etc. Meanwhile, the possible oxidative degradation routes of 2-naphthol were proposed.