Electrolytic treatment of C.I. Acid Orange 7 in aqueous solution using a three-dimensional electrode reactor

详细信息	查看全文 | 推荐本文 |

• 作者：Lina Xu ; Huazhang Zhao ; Shaoyuan Shi ; Guangzhi Zhang ; Jinren Ni
• 关键词：Electrolytic treatment ; Three-dimensional electrode reactor ; Acid Orange 7 ; Activated carbon fiber ; Degradation kinetics
• 刊名：Dyes and Pigments
• 出版年：2008
• 期刊代码：31_01437208
• 类别：ms
• 出版时间：2008
• 卷：77
• 期：1
• 页码：158-164
• 文件大小：233 K

摘要

A simulated wastewater containing the monoazo dye C.I. Acid Orange 7 was electrolytically treated using a three-dimensional electrode reactor equipped with granular activated carbon as particle electrode. The activated carbon fiber cathode was more effective than either a graphite or a stainless steel cathode due to its larger surface area which was beneficial to the electrogeneration of H₂O₂. Under the reaction conditions of 20 V and 3.0 g L⁻¹ Na₂SO₄ at pH 3.0, decrease in the COD of up to 80%, and in the TOC by up to 72%were achieved and almost the complete decolorization of the dye was secured after 180 min electrolysis. Furthermore, decay of the dye followed a pseudo-first-order reaction in the first 60 min treatment. The three-dimensional electrode system generated more hydroxyl radicals than a two-dimensional system due to the formation of microelectrodes under applied high potential.