水力空化结合Fenton过程降解甲基橙染料废水

Degrading the Methyl Orange Dye Wastewater by Combination of Hydrodynamic Cavitaton with Advanced Fenton Process

自行设计了一套以孔板为核心的空化装置,将水力空化与Fenton过程相结合,降解甲基橙。通过紫外分光光度计测定处理过程溶液的吸光度,考察了溶液pH、入口压力、孔板排布方式对甲基橙脱色率的影响;并与单一方法进行对比。结果表明:随着pH由7降至2,脱色率先上升后下降,最佳pH=3;随着入口压力由0.2 MPa增至0.6 MPa,脱色率也呈现先上升后下降的趋势,最佳压力为0.4 MPa;按照脱色率由高到低,排布方式依次为:均分布、环状分布、辐射分布;水力空化与Fenton过程结合较单一方法能量利用率有所提高,数值为1.42×10^(-4)mg/J。

A cavitation device based on orifice plates was designed to degrade methyl orange by means of hydrodynamic cavitation in conjunction with advanced Fenton process. According to detect the absorbance of the solution during processing with UV-vis,the effect of solution pH,inlet pressure and arrangement of orifice plates on decoloring rate were investigated. The proposed method was compared to two single methods. The results are showed as followed： as the pH decreased from 7 to 2,decolorization rate shows its descending following its ascending,the best pH is 3; As the inlet pressure increased from 0. 2 to 0. 6 MPa,decolorization rate also shows a trend of decline after rising first,the best pressure is 0. 4 MPa; According to the changing rule of the decolorization rate（ from high to low）,the order of configuration mode is uniform distribution,annular distribution,radiation distribution; The energy utilization rate of the combined method is higher than single methods. Its numerical value is 1. 42 × 10^-4mg/J.