辉光放电等离子体降解模拟染料废水的研究

用辉光放电等离子体技术对伊红B模拟染料废水降解进行了研究.借助紫外光谱和荧光光谱分析其降解过程,用酸度计测定了降解液pH的变化,用原子力显微镜观察了降解过程中伊红B的形貌并初步探讨了降解机理.结果表明,伊红B被降解为CO2、H2O和简单无机盐;在波长为513 nm时,降解110 min后,脱色率达到95%;反应后降解液pH降低,说明反应过程中有羧酸类物质生成.通过吸光度值计算得到了动力学常数k=0.0206 min-1,降解过程符合一级反应动力学特征.

Degradation of dye wastewater by using glow discharge electrolysis plasma

Glow discharge electrolysis degradation of Eosin B solutions has been investigated. Ultraviolet (UV) absorption spectra, fluorescence spectra (FS), pH meter and atomic force microscopy (AFM) are used to monitor the degradation process. A simple degradation mechanism for Eosin B is proposed on the basis of UV, FS, pH and AFM. It has been found that Eosin B is completely mineralized into CO_ 2 , H_ 2 O and inorganic compound. Within 110 min, the decolorization rate at 513 nm is 95%. The values of pH in the solution are decreased during the degradation process due to the carboxylic acids formed. The reaction constant k is calculated to be 0.0206 min~ -1 by absorbency values, and the reaction may follow well first order kinetics.