采用三维电极反应器结合超声波处理水溶液中的甲基橙的电解方法。

Electrolytic treatment of methyl orange in aqueous solution using three-dimensional electrode reactor coupling ultrasonics.

机构信息

Department of Applied Chemistry, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, China.

出版信息

Environ Technol. 2010 Apr 1;31(4):417-22. doi: 10.1080/09593330903511413.

DOI:10.1080/09593330903511413

PMID:20450116

Abstract

The treatment of wastewater containing methyl orange was investigated experimentally using a three-dimensional electrode reactor coupling ultrasonics and the effect of ultrasonics on the degradation was studied. The effects of cell voltage, original concentration of methyl orange, pH value and the concentration of electrolyte on the removal efficiency were considered. The experimental results indicated that the removal rate of methyl orange exceeded 99% and the removal of chemical oxygen demand (COD(Cr)) approached 84% under the optimum conditions. Using ultraviolet-visible spectrum analysis, a general degradation pathway for methyl orange was proposed based on the analysis of intermediate compounds. According to the ultraviolet-visible spectral changes during degradation of methyl orange, it can be presumed that the removal of COD(Cr) lags behind the removal of methyl orange because the structure of the benzene ring was more difficult to destroy compared with the azo double bonds.

摘要

采用三维电极反应器耦合超声波实验研究了含甲基橙废水的处理方法，并研究了超声波对降解的影响。考察了槽电压、甲基橙初始浓度、pH 值和电解质浓度对去除效率的影响。实验结果表明，在最佳条件下，甲基橙的去除率超过 99%，化学需氧量（COD(Cr)）的去除率接近 84%。通过紫外-可见光谱分析，根据中间产物的分析，提出了甲基橙的一般降解途径。根据降解过程中甲基橙紫外-可见光谱的变化，可以推断出 COD(Cr)的去除落后于甲基橙的去除，因为与偶氮双键相比，苯环的结构更难破坏。