Electrochemical degradation of C. I. Acid Orange 7

被引：234

作者：

Fernandes, A ^{[1
]}

Morao, A ^{[1
]}

Magrinho, M ^{[1
]}

Lopes, A ^{[1
]}

Gonçalves, I ^{[1
]}

机构：

[1] Univ Beira Interior, Dept Chem, P-6201001 Covilha, Portugal

来源：

DYES AND PIGMENTS | 2004年 / 61卷 / 03期

关键词：

Acid Orange 7; electrochemical degradation; diamond electrodes; wastewater treatment; dyeing house effluent;

D O I：

10.1016/j.dyepig.2003.11.008

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The electrochemical oxidation of C. I. Acid Orange 7 (AO7) was performed on a boron doped diamond electrode (BDD). Bulk electrolysis was studied using two different supporting electrolytes-KCl and Na2SO4. The influence of electrolyte concentration, initial dye concentration and current density on the degradation rates was investigated. Samples were collected at pre-selected intervals and absorbance measurements and chemical oxygen demand (COD) tests were performed, to compare the rates of colour and COD removal in each case. From the COD measurements over the time of electrolysis mass transfer coefficients were determined, and the current efficiency was estimated using a theoretical model. Results have shown an almost complete colour removal and COD removal, higher than 90%. A preliminary electro degradation study of an effluent from an UASB reactor, used on the biodegradation of a textile wastewater containing AO7, was also performed with colour and COD removals of 98% and 77%, respectively. (C) 2003 Published by Elsevier Ltd.

引用

页码：287 / 296

页数：10

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