摘要
为探索超声协同电化学氧化的最优试验条件,以实现低耗、高效降解污染物,提出了电化学氧化-超声协同电化学氧化的新型两段式降解工艺,将其应用于甲基橙染料废水的降解。结果表明,经过1 h的电化学氧化后,氧化电流效率较低,此时选择超声协同电化学氧化对甲基橙溶液进行矿化。用此两段式工艺降解4 h后,甲基橙溶液的TOC去除率达到94.3%,而在相同时间内单独电化学氧化和超声协同电化学氧化TOC去除率分别为76.1%和95.6%。在达到相同TOC去除率的情况下,两段式降解过程的能耗小于超声协同电化学降解的能耗。由此可见,此新型的两段式超声电化学组合降解工艺成功实现了甲基橙溶液的高效、低耗的降解处理。为染料废水的降解提供一种崭新的研究思路。
The new electrochemical oxidation （EC） - ultrasound enhanced electrochemical oxidation （US-EC） two-step process was proposed to explore the optimal condition in the ultrasound enhanced electrochemical oxidation process, reaching the efficient mineralization of pollutants with low energy. The process was applied to degrade the methyl orange （MO） dye wastewater. The experiment results show that the current efficiency is low after 1.0 h EC oxidation. At this time, the US-EC was used to mineralize the pollutants in the solution. TOC removal was 94.3% at 4 h in the two-step process, which was 76.1% and 95.6% in the EC process and US-EC process, respectively. Moreover, the energy consumption in two-step process is less than that in US-EC process. The expected results of high efficient and maximum energy savings were achieved, which manifests the advantage of energy savings. The method will provide a new idea for the degradation of dye wastewater. And it has an important theoretical significance and practical application.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第9期49-52,共4页
Technology of Water Treatment
关键词
两段式
超声
电化学氧化
甲基橙
two-step
ultrasound
electrochemical oxidation
methyl orange
