H2O2引发的UV/Fenton苯酚光催化降解

研究了H2O2引发光催化降解方法对废水中微量苯酚的去除效果,应用传感技术分析了降解过程中H2O2浓度变化,及其H2O2引发光催化降解苯酚的机理,考察了影响苯酚光催化降解的因素,确定了最佳降解试验条件为:H2O2 0.075~0.30mmol/L,Fe3+ 0.1~0.15mmol/L,pH值 4~5.在此条件下,苯酚初始浓度为50mg/L的含酚废水反应2h,苯酚降解率达到95%,矿化去除率达77%.

Photocatalytic degradation of phenol with hydrogen peroxide

Removal of trace phenol in wastewater was investigated by hydrogen peroxide-induced photocatalytic degradation process. Mechanism of photocatalytic degradation of phenol was proposed on the base of the change of H2O2 concentrations during degradation process detected by electrochemical sensors. The optimum conditions determined by intensive analysis of parameters affecting photocatalytic degradation were as follow:H2O2 dosage 0.075~0.30 mmol/L, Fe3+ 0.1~0.15 mmol/L and pH of waste water 4~5. Under the optimum conditions, phenol degradation and mineralization rates could reach 95 % and 77 %, respectively when initial phenol concentration was 50mg/L and degrade time lasted 2 h.