Azo dye decolorization in an up-flow biocatalyzed electrolysis reactor

作者：Peng Jing^*; Guo Yuqi; Cui Dan; Wang Aijie

来源：Journal of Harbin Institute of Technology, 2013, 45(4): 53-57.

• 5-aminosalicylic acids
• Alizarin yellow
• Alizarin Yellow R (AYR)
• Decolorization
• Decolorization rates
• Electrochemical reactions
• P-phenylene diamines
• Up flow biocatalyzed electrolysis reactors (UBER)

Due to the low efficiency of traditional azo dye treatment process, in this study a novel up-flow biocatalyzed electrolysis reactor was used for azo dye alizarin yellow R (AYR) decolorization. The reactor operated in an up-flow, continuous flow mode, and the results showed that the decolorization efficiency was 82.1% and the decolorization rate was 1.74 mol&middotm-3&middotd-1 at HRT of 4 h. The chrominance of the effluent was as low as 80. AYR was mainly discolored via electrochemical reaction in the cathode zone of UBER. The bio-anode also made some contribution to the decolorization. Two stable products p-phenylenediamine and 5-aminosalicylic acid were produced finally without accumulation of nitro intermediates.

• 出版日期2013