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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >A comparative study on electrochemical oxidation of anthroquinone dye with in situ electrogenerated active chlorine in an undivided cell and in a divided cell
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A comparative study on electrochemical oxidation of anthroquinone dye with in situ electrogenerated active chlorine in an undivided cell and in a divided cell

机译：在未分开的电池和分开的电池中原位生成的活性氯对蒽醌染料进行电化学氧化的比较研究。

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摘要

The electrochemical oxidation of C.I.Reactive Blue 19 with in situ electrogenerated active chlorine was carried out in a flow-by cell with and without catonic exchange membrance, respectively, using metallic oxide coatings ( DSA~®) as anode and graphite as cathode. Under galvanostatic model, measurements of the absorbance at 592nm and 255nm have been used to follow the discolorization of the dye and the degradation of its aromatic ring. After a 6-hour electrolysis at 15 A/m~2 current density, for a simulated wastewater composed of 0.2 mol/L NaCl, 0.1 mol/L Na_2SO_4, 0.1 mmol/L dye, the color reduction of the dye and the degradation efficiency of its aromatic ring was about 90%, 32%, respectively, in an undivided cell; 100%, about 32%, respectively, in a divided cell. No obvious change of TOC was observed in the whole oxidation. The experimental results have suggested that both the decolorization of the dye and degradation of its aromatic ring were pseudo-first-order reaction; that indirect electrooxidation, using electrogenerated active chlorine, was predominately in the electrochemical oxidation.
机译：使用金属氧化物涂层（DSA®）作为阳极和石墨作为阴极，分别在具有和不具有阳离子交换膜的流通池中对具有原位电生成的活性氯的C.I.活性蓝19进行电化学氧化。在恒电流模型下，已测量了592nm和255nm处的吸光度，以追踪染料的变色和其芳香环的降解。在电流密度为15 A / m〜2的条件下电解6小时后，对于由0.2 mol / L NaCl，0.1 mol / L Na_2SO_4、0.1 mmol / L染料组成的模拟废水，染料的颜色还原和降解效率在一个未划分的单元中，其芳香环的分别约为90％和32％。在分开的单元格中分别为100％，约32％。在整个氧化过程中没有观察到TOC的明显变化。实验结果表明，染料的脱色和芳香环的降解都是伪一级反应。使用电生成的活性氯进行的间接电氧化主要发生在电化学氧化中。

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