The Photocatalytic Degradation Of Methyl Orange Solution And Chlorobenzene Wastewater

Nanoscale particle TiO2-coated fiberglass cloth support (TiO2-FGC )was prepared by dipping fiberglass cloth in chemical bonding-material containing nanoscale particle TiO2, then roasting at 120 癈 for one hour. The crystal phase, the morphology, and the TiO2 amount on the cloth were determined by XRD, SEM, and the plasma action spectrum method (PA method), respectively. The test report indicated that amount of active TiO2 on the TiO2-FGC was 75ug/cm2 .The TiO2~FGC with A4 paper size contained 46.8 mg active TiO2.An open fixed-bed photoreactor illuminated with a 125W high pressure mercury lamp was developed. The distance between the lamp and the TiO2-FGC is 30 cm. The TiO2 amount to handling volume ratio was 23.4 mg/L.A series of studies was carried out to investigate the effect of TiO2-FGC in the photocatalyzing degradation of aqueous methyl orange, simulated chlorobenzene sample and containing benzene and chlorobenzene waste.The effect of aerating rate, circulating flow rate of reactive liquid, the addition of H2O2 and original pH value on the degradation of 20 mg/L methyl orange solution were studied in details. At circulating flow rate 1000 ml/min, H2O2 1. 9 mmol/L, pH 4. 4, the highest performance was observed. The first-order kinetic constant of degradation was 2. 29 h-1. At the radiation time 2 h, the degradation efficiency was 98%.The results showed that the TiO2-FGC had high photocatalytic activity on degradation of chlorobenzene in simulated sample.The results also showed that the pH addition had less effect on the chlorobenzene degradation.