Ultrasound irritation enhanced heterogeneous activation of peroxymonosulfate with Fe3O4 for degradation of azo dye

被引：206

作者：

Liu, Jie ^{[1
]}

Zhou, Jihao ^{[1
]}

Ding, Zhaoxia ^{[1
]}

Zhao, Zhiwei ^{[1
]}

Xu, Xiao ^{[1
]}

Fang, Zhendong ^{[1
]}

机构：

[1] Logist Engn Univ, Dept Natl Def Construct Planning & Environm Engn, Chongqing 401311, Peoples R China

来源：

ULTRASONICS SONOCHEMISTRY | 2017年 / 34卷

基金：

中国国家自然科学基金;

关键词：

Magnetite; Ultrasound; Peroxymonosulfate; Azo dye; Sulfate radicals; ACID ORANGE 7; ADVANCED OXIDATION; SULFATE RADICALS; MAGNETIC NANOPARTICLES; EFFICIENT DEGRADATION; PERSULFATE; CATALYST; DECOLORIZATION; 4-CHLOROPHENOL; NANOCOMPOSITES;

D O I：

10.1016/j.ultsonch.2016.08.005

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Magnetic Fe3O4 nanoparticles were synthesized and used as peroxymonosulfate (PMS) activator in the presence of ultrasound (US) irritation for azo dye degradation in this study. At pH 7.0 and temperature 298 K, Fe3O4 nanoparticles were able to activate PMS under ultrasound irritation to produce sulfate radicals for acid orange 7 (AO7) removal in 30 min. Higher catalysts dosage, neutral pH as well as optimum values of PMS dosage and ultrasound power favored the AO7 degradation. Fe3O4 displayed excellent stability and reusability in the US/PMS system. Both of the sulfate radicals and hydroxyl radicals were produced in the reaction and sulfate radicals were the dominant according to the scavenging tests and electron paramagnetic resonance (ESR) tests. The mechanisms of ultrasound irritation enhanced PMS activation in the presence of Fe3O4 were proposed based on the results and literatures. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：953 / 959

页数：7

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