Anodic oxidation of Reactive Black 5 dye using boron doped diamond anodes in a bipolar trickle tower reactor
Anodic oxidation of Reactive Black 5 dye using boron doped diamond anodes in a bipolar trickle tower reactor
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DOI：
10.1016/j.seppur.2011.10.001
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发表时间：
2012-02
影响因子：
8.6
通讯作者：
Y. Yavuz;R. Shahbazi
中科院分区：
文献类型：
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作者：
Y. Yavuz;R. Shahbazi
纺织品加工业在发展中国家很普遍。在纺织工业的各种工艺中，染色工艺使用大量的水进行染色，固定和洗涤。纺织工业废水的特点是悬浮颗粒、盐、高pH值和高化学需氧量（COD）浓度，这些有毒废水的排放将引起环境的重大问题。采用双极滴流塔（BTT）反应器和拉西环形掺硼金刚石（BDD）电极，在循环间歇模式下实现了活性黑5（RB 5）染料的电化学氧化。实验参数，如流速，硫酸钠浓度（Na 2SO 4）作为支持电解质，初始pH值，电流密度和初始染料浓度进行了检查。得到最佳实验条件为：电流密度1 mAcm −2，自然pH，流速100 mLmin −1，Na 2SO 4浓度0.02molL−1。在此条件下，色度去除率达97%，COD去除率为51%，TOC去除率为29.3%。在相同条件下，RB 5溶液的毒性也相对于其初始毒性值有所降低。
Textile processing industries are widespread in developing countries. Among the various processes in the textile industry, the dyeing process uses large volumes of water for dyeing, fixing and washing. Textile industry wastewater is characterized by suspended particles, salts, high pH and high chemical oxygen demand (COD) concentrations that discarding of these toxic wastewaters to the environment will cause a major problem. In this study, electrochemical oxidation of Reactive Black 5 (RB5) dye using bipolar trickle tower (BTT) reactor and Raschig ring shaped boron-doped diamond (BDD) electrodes in recirculated batch mode was fulfilled. Experimental parameters like flow rate, sodium sulfate concentration (Na2SO4) as supporting electrolyte, initial pH, current density and initial dye concentration were examined. The best experimental conditions obtained were as follows: current density 1mAcm−2, natural pH, flow rate 100mLmin−1, Na2SO4concentration 0.02molL−1. Under these conditions, 97% color, ∼51% COD and 29.3% TOC removal were achieved. Toxicity of RB5 solution was also decreased relatively to its initial toxicity value at the same conditions.