污染控制技术及原理
陆泉芳,俞洁.辉光放电等离子体降解模拟染料废水的研究[J].环境科学学报,2006,26(11):1799-1803
辉光放电等离子体降解模拟染料废水的研究
- Degradation of dye wastewater by using glow discharge electrolysis plasma
- 基金项目：甘肃省自然科学基金资助项目(No.3ZS041-A25-028);西北师范大学科技创新工程资助项目(No.KJCXGC-01)
- 作者
- 单位
- 陆泉芳
- 西北师范大学学报编辑部, 兰州 730070
- 俞洁
- 中国科学院兰州化学物理研究所, 兰州 730000
- 摘要：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513nm时,降解110min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=0.0206min-1,降解过程符合一级反应动力学特征.
- Abstract：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 CO2, H2O 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.
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