UV/Fenton氧化法对苯酚氧化效果的实验研究

Experiment study on oxidation effect of UV/Fenton on phenol

研究UV/Fenton氧化法中各个因素对降解水中苯酚的影响,确定UV/Fenton法处理苯酚废水的工艺条件。保持UV/Fenton体系的基准条件不变,通过改变H2O2浓度、n(Fe2+)∶n(H2O2)、废水初始pH值等实验条件,考察这些因素对UV/Fenton法处理苯酚废水效果的影响。结果表明:UV/Fen-ton氧化法对苯酚废水有较好的去除效果和较高的反应速率。当废水初始pH值为3.0时,经30 min的反应,苯酚去除率达到99%,COD去除率达到86%。但是苯酚废水COD去除率滞后于苯酚去除率。UV/Fenton法能够在较短的时间内去除苯酚和COD,H2O2浓度、n(Fe2+)∶n(H2O2)对处理效果影响较大,H2O2浓度决定苯酚去除率和COD去除率,而n(Fe2+)∶n(H2O2)是影响降解速率的主导因素。

The paper studied various factors that impact on depredating the phenol in water by UV/ Fenton oxidation process,and ensured the process conditions. Keeping the basic reaction conditions of the UV/Fenton system constant, which is to investigate these factors influenced on the effect of phenol wastewater treatment, through controlling the dosage of H2O2, Fe^2＋ mass concentration, pH, aeration, ect. The UV/Fenton oxidation process has a better degradation effect and a higher reaction rate tharl the traditional methods. At original pH value of 3.0 of the wastewater, the iemoval rate of phenol and COD will reach 99% and 86% through 30 rain reaction respectively. But the removal rate of the COD of phenol wastewater is worse than the phenol. The UV/Fenton process is capable of removing the phenol and COD of wastewater in a short time. The dosage of H2O2 and Fe^2＋ mass concentration have a lager influence on the treatment. The degradation rate of phenol and COD are determined by the dosage of H2O2 ,while the Fe^2＋ mass concentration is the dominant factor.