Study On Multiphase Catalyst For Photocatalytically Degrading Molasses-Alcoholic Wastewater

Molasses-alcoholic wastewater is difficult to degrade, and it is a "bottleneck" problem of comprehensive utilization of sugarcane in sugar industry of GuangXi Zone. In This paper multiphase photocatalyser and its photocatalytic degrading process for molasses-alcoholic \vaste\vatcr by are studied. The fundamental data of photocatalytic degradation for molasses-alcoholic wastewater are given, therefore have important theoretical value and practical perspective.A series of catalyzers were compounded by many methods, and compared their preperties with that of TiO2, a representative photocatalyzer in our paper.Our experiments show that the photocatalyzers PbWO4 and Bi2WO6 are good to degrade molasses-alcoholic wastewater.Bi2WO6, was denatured by adding Fe3+and the improved degration rate was found. By this measure of XRD, FTIR, TG-DTA and DRS to token catalyzers, the result showed that the Eg (eV) of PbWO4 and Bi2WO6are 2.75eV and2.S2eV, these are far lower than that of TiO2 Eg 3.04eV. So photocatalyzers PbWO4 and Bi2WO6 can absorb more energy of visible light. The study discover that some oxides in those catalyzers are the main reasons of catalyzers producing better degradation rate.This paper discover that catalyzer dosage, illumination time, amount of H2O2, velocity of air fluid and pH have some influence on the process of photocatalytic degrading for molasses-alcoholic wastewater. The process is complicated, the organic molecular of e/m 333 and 381 is firstly degraded, and the process is not a unselect process ,but a selective one.