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Formation of hydrogen peroxide and treatment of Sunset Yellow wastewater using pulsed high‐voltage discharge system
Author(s) -
Zhou Zhiyong,
Ma Yuepeng,
Liu Ying,
Lu Shuaijun,
Ren Zhongqi
Publication year - 2017
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22658
Subject(s) - sunset , hydrogen peroxide , wastewater , electrode , degradation (telecommunications) , conductivity , chemistry , analytical chemistry (journal) , materials science , environmental engineering , chemical engineering , environmental chemistry , environmental science , electronic engineering , optics , organic chemistry , physics , engineering
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 H 2 O 2 were investigated in the mechanism experiments using deionized water. The concentration of H 2 O 2 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 H 2 O 2 . Bubbling O 2 could obviously enhance the generation of H 2 O 2 . Afterwards, the effects of discharge type, initial pH, and bubbling gas type on the formation of H 2 O 2 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 Fe 2+ into the discharge process, which obviously enhanced the degradation of Sunset Yellow. Besides, the effects of initial pH and Fe 2+ 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.