标题：Electro-Fenton removal of Orange II in a divided cell: Reaction mechanism, degradation pathway and toxicity evolution作者：Lin, Heng; Zhang, Hui; Wang, Xue; Wang, Liguo; Wu, Jie

来源出版物：SEPARATION AND PURIFICATION TECHNOLOGY 卷：122 页：533-540 DOI：10.1016/j.seppur.2013.12.010 出版年：FEB 10 2014

摘要：Orange II was degraded in a divided electrolytic cell in which a salt bridge was used to connect the anode and cathode. Hydrogen peroxide and ferrous ion are electrogenerated at the carbon-felt (CF) cathode. Cathode reduction contributes to the decolorization in cathodic compartment. The decay of COD and TOC was attributed to hydroxyl radicals produced by Fenton's reaction in cathodic compartment. Anodic oxidation of Orange II was much less pronounced than cathodic Fenton's reaction. The effects of some important reaction parameters in cathodic compartment indicated that the optimal conditions for Orange II degradation were current density 1.78 mA/cm(2), initial pH 3.0 and Fe3+ concentration 0.2 mM. The intermediate products were determined by GC-MS analysis and the plausible degradation pathway in cathodic compartment was proposed. Toxicity test with Daphnia magna showed that the acute toxicity of the solution increased during the first stage of the reaction, and then gradually declined with the progress of cathodic Fenton's reaction.

入藏号：WOS:000331422800065

文献类型：Article

语种：English

作者关键词：Orange II; Electro-Fenton; Divided cell; Carbon-felt; GC-MS

扩展关键词：RESPONSE-SURFACE METHODOLOGY; WASTE-WATER TREATMENT; PHOTO-FENTON; HYDROGEN-PEROXIDE; AZO-DYE; EXPERIMENTAL-DESIGN; LANDFILL LEACHATE; AQUEOUS-SOLUTION; TITANIUM-OXIDE; CRYSTAL VIOLET

通讯作者地址：Zhang, Hui,Wuhan Univ, Dept Environm Engn, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

电子邮件地址：eeng@whu.edu.cn

地址：

[Lin, Heng; Zhang, Hui; Wang, Xue; Wang, Liguo; Wu, Jie] Wuhan Univ, Dept Environm Engn, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

研究方向：Engineering

ISSN：1383-5866

标题：Degradation of Acid Orange 7 by persulfate activated with zero valent iron in the presence of ultrasonic irradiation作者：Wang, Xue; Wang, Liguo; Li, Jiangbo; Qiu, Juanjuan; Cai, Chun;Zhang, Hui

来源出版物：SEPARATION AND PURIFICATION TECHNOLOGY 卷：122页：41-46 DOI：10.1016/j.seppur.2013.10.037 出版年：FEB 10 2014

摘要：The removal of Acid Orange 7 by zero-valent iron (Fe-o) activated sodium persulfate (Na2S2O8, PS) in the presence of ultrasonic irradiation (US) was performed in this study. The effects of persulfate concentration, zero valent iron addition, ultrasonic power and initial pH on the decolorization rate of Acid Orange 7 were investigated. The results showed that the decolorization rate increased with an increase in persulfate concentration from 0.1 to 0.5 g/L, an increase in zero valent iron amount from 0.1 to 0.5 g/L, and an increase in ultrasonic power from 40 to 60 W. But further increase in persulfate concentration, zero valent iron addition and ultrasonic power would result in an unpronounced increase of decolorization rate. The optimal initial pH for decolorization was found as 5.8. The maximum decolorization efficiency of 96.4% was achieved within 20 min with persulfate concentration of 0.3 g/L, zero valent iron concentration of 0.5 g/L, initial pH value of 5.8 and ultrasonic power of 60 W.

入藏号：WOS:000331422800007

文献类型：Article

语种：English

作者关键词：Ultrasound; Acid Orange 7; Sulfate radicals; Zero valent iron; Heterogeneous activation; Decolorization

扩展关键词：RECTANGULAR AIRLIFT REACTOR; ADVANCED FENTON PROCESS; AQUEOUS-SOLUTION; HYDROGEN-PEROXIDE; CHEMICAL OXIDATION; WASTE-WATER; AZO-DYE; DECOLORIZATION; RADICALS; REMOVAL

通讯作者地址：Zhang, Hui,Wuhan Univ, Dept Environm Engn, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

电子邮件地址：eeng@whu.edu.cn

地址：

[Wang, Xue; Wang, Liguo; Li, Jiangbo; Qiu, Juanjuan; Cai, Chun; Zhang, Hui] Wuhan Univ, Dept Environm Engn, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

研究方向：Engineering