Formation of hydrogen peroxide and treatment of Sunset Yellow wastewater using pulsed high-voltage discharge system

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• 作者：Zhiyong Zhou ; Yuepeng Ma ; Ying Liu ; Shuaijun Lu and Zhongqi Ren
• 刊名：The Canadian Journal of Chemical Engineering
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：95
• 期：2
• 页码：290-296
• 全文大小：799K
• ISSN：1939-019X

文摘

Pulsed high-voltage discharge, one of the advanced oxidation processes, was used for the treatment of Sunset Yellow wastewater. The effects of discharge type, initial pH, conductivity, and bubbling gas type on the formation of H₂O₂ were investigated in the mechanism experiments using deionized water. The concentration of H₂O₂ formed in hybrid series discharge mode was higher than that formed in hybrid gas-liquid discharge and liquid discharge modes. Moreover, a pH of 1 and low conductivity were beneficial to the formation of H₂O₂. Bubbling O₂ could obviously enhance the generation of H₂O₂. Afterwards, the effects of discharge type, initial pH, and bubbling gas type on the formation of H₂O₂ were also studied in the degradation experiments of Sunset Yellow. The experiment results were consistent with the mechanism experiments. Fenton reaction happened by the introduction of Fe²⁺ into the discharge process, which obviously enhanced the degradation of Sunset Yellow. Besides, the effects of initial pH and Fe²⁺ concentration on the Sunset Yellow degradation followed the second-order kinetics. Moreover, the degradation efficiency of Sunset Yellow with copper mesh as an electrode was much higher than that with the needle electrode. This article proposed a feasible approach to deal with Sunset Yellow wastewater.