Application of electro-Fenton process as alternative for degradation of Novacron Blue dye

被引：45
|
作者：
Fernades Rego, Francisco Emanuel [1 ]
Sales Solano, Aline Maria [1 ]
da Costa Soares, Izabelle Cristina [1 ]
da Silva, Djalma Ribeiro [1 ]
Martinez Huitle, Carlos Alberto [1 ]
Panizza, Marco [2 ]
机构：
[1] Univ Fed Rio Grande do Norte, Inst Chem, BR-59072970 Lagoa Nova, RN, Brazil
[2] Univ Genoa, Dept Civil Chem & Environm Engn, I-16129 Genoa, Italy
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2014年 / 2卷 / 02期
关键词：
Electro-Fenton; Novacron Blue; Synthetic dye; Hydrogen peroxide; Carbon felt;
D O I：
10.1016/j.jece.2014.02.017
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The electrochemical removal of a synthetic solution containing 190 mg L-1 of Novacron Blue (NB) dye has been studied by electro-Fenton process using a carbon felt gas-diffusion O-2 cathode to produce in situ hydrogen peroxide by oxygen reduction. The effect of operating conditions (Fe2+ concentration, applied current and pH solution on the efficiency of the process) was investigated. Results clearly showed that NB and their products may be effectively degraded by the (OH)-O-. radicals produced by the reaction between the Fe2+ ions and the in situ electrogenerated H2O2 at carbon felt gas-diffusion O-2 cathode. After 4 h of electrolysis, chemical oxygen demand (COD) removal was only 34% when no ferrous ions were added to the solutions, while the presence of ferrous ion greatly improved COD removal to more than 90%, depending on operating conditions. Spectrophotometric analysis indicated that the discoloration of the solution occurs in all operating conditions, while gas chromatographic / mass spectrometry analysis confirmed the degradation of NB dye via identification of the principal intermediates formed. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：875 / 880
页数：6
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