Electrochemical degradation of the dye indigo carmine at boron-doped diamond anode for wastewaters remediation

被引：134

作者：

Ammar, Salah

Abdelhedi, Ridha

Flox, Cristina

Arias, Conchita

Brillas, Enric ^{[1
]}

机构：

[1] Univ Barcelona, LCTEM, Dept Quim Fis, Fac Quim, E-08028 Barcelona, Spain

[2] Ecole Natl Ingn Sfax, UR Electrochim & Environm, Sfax, Tunisia

来源：

ENVIRONMENTAL CHEMISTRY LETTERS | 2006年 / 4卷 / 04期

关键词：

indigo carmine; anodic oxidation; boron-doped diamond electrode; mineralization;

D O I：

10.1007/s10311-006-0053-2

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Here we demonstrate that anodic oxidation with a boron-doped diamond (BDD) electrode can be applied to the remediation of wastewaters containing indigo carmine. This environmentally friendly method decontaminates completely acid and alkaline aqueous solutions of this dye. The degradation rate increases with increasing current and dye concentration. Indigo carmine is more rapidly removed in alkaline than in acid medium, but its kinetics does not follow a defined reaction order. Isatin 5-sulfonic acid is the main aromatic product formed. Oxalic and oxamic acids are generated as ultimate carboxylic acids. The nitrogen of the dye is converted into NH4+ and NO3-.

引用

页码：229 / 233

页数：5

共 10 条

[1] Electrochemical destruction of chlorophenoxy herbicides by anodic oxidation and electro-Fenton using a boron-doped diamond electrode [J].