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题名: Promoted discoloration of methyl orange in H2O2/Fe(III) Fenton system: Effects of gallic acid on iron cycling
作者: Dong, Huiyu; Sans, Carme; Li, Wentao; Qiang, Zhimin
刊名: SEPARATION AND PURIFICATION TECHNOLOGY
出版日期: 2016-10-17
卷号: 171, 期号:0, 页码:144-150
关键词: Fenton ; Complexing ; Gallic acid ; Iron cycling
DOI: 10.1016/j.seppur.2016.07.033
部门归属: 中国科学院饮用水科学与技术重点实验室
英文摘要: The promoting effect of gallic acid (GA) on the discoloration of methyl orange (MO) in H2O2/Fe(III) Fenton process was investigated in this study. The MO discoloration rate in H2O2/Fe(III) system with GA was significantly higher than that with sulfuric acid. Central composite design based on the response surface methodology (RSM) was adopted to evaluate the effects of initial Fe(III) concentration, initial pH and molar ratios of H2O2/Fe(III) and GA/Fe(III) on the discoloration rate constant k(app). The RSM model was derived and optimal molar ratios of H2O2/Fe(III) similar or equal to 100:1 and GA/Fe(III) = 2:1 were obtained. The H2O2/Fe(III)/GA system also showed good adaptability with minor decreasing trend in alkaline circumstance. Reaction mechanisms for the promoted formation of hydroxyl radical (HO center dot) by GA were proposed. GA could not only form complexes with Fe(III) to Fe(II) and prevent the precipitation of Fe(III) subsequently, but also accelerate the reduction of Fe(III) to enhance the formation of HO center dot. Moreover, the readily oxidizable characteristic of GA makes it a good option with environmental benignity in Fenton system. (C) 2016 ElSevier B.V. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36208
Appears in Collections:中国科学院饮用水科学与技术重点实验室_期刊论文

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Recommended Citation:
Dong, Huiyu,Sans, Carme,Li, Wentao,et al. Promoted discoloration of methyl orange in H2O2/Fe(III) Fenton system: Effects of gallic acid on iron cycling[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2016,171(0):144-150.
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