A low-voltage pulse electrolysis method for the degradation of anthraquinone and azo dyes in chloride medium by anodic oxidation on Ti/IrO2-RuO2-SnO2 electrodes
A low-voltage pulse electrolysis method for the degradation of anthraquinone and azo dyes in chloride medium by anodic oxidation on Ti/IrO2-RuO2-SnO2 electrodes
复制标题
Ti/IrO2-RuO2-SnO2电极阳极氧化降解氯化物介质中蒽醌和偶氮染料的低压脉冲电解方法
DOI：
10.1002/wer.1270
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发表时间：
2019-11-26
影响因子：
3.1
通讯作者：
Liu, Dongqi
中科院分区：
文献类型：
--
作者：
Chao, Hong-Jun;Xue, Dan;Liu, Dongqi
纺织工业产生的含有偶氮染料和蒽醌染料的废水是环境的重要污染源，对水生生物有毒。为了克服传统电化学氧化的高能量成本，研究了一种通过15.0-20.0 V低电压脉冲放电降解蒽醌和偶氮染料的定制电源装置。涂有混合氧化物（Ti/IrO2-RuO2-SnO2）的钛板和纯钛板分别用作阳极和阴极，用于在染料溶液中产生氯。对于蒽醌染料活性蓝19，使用该系统去除了60.0%的化学需氧量(COD)和22.0%的总有机碳(TOC)。直流电解和脉冲放电的比较表明，采用脉冲放电方法可降低能源成本68.6%。采用紫外-可见光、LC-MS和GC-MS对活性蓝19降解过程中形成的中间化合物进行鉴定。结果表明，在氯/次氯酸盐的氧化过程中，发色基团首先被氧化为-NH2，然后通过芳环的氯化而脱色。结果证实，低压脉冲电解可用于降解废水中的工业染料。实践要点低压脉冲电解可用于降解工业染料和/或废水中的染料。对于阴离子染料活性蓝 19，使用低电压 (20.0 V) 脉冲电解去除了 60.0% 的 COD 和 22.0% 的 TOC。与直流电解相比，脉冲放电方法使该降解过程的能源成本降低了68.6%。通过紫外-可见光谱、LC-MS 和 GC-MS 证实了 Reactive Blue 19 降解过程中形成的中间化合物。
Wastewater produced by the textile industry containing azo dyes and anthraquinone dyes is significant source of pollution to the environment and is toxic for aquatic life. To overcome the high-energy cost of traditional electrochemical oxidation, a custom-built power supply device for the degradation of anthraquinone and azo dyes by low voltage of 15.0-20.0 V pulsed discharge was investigated. Titanium coated with mixed oxide (Ti/IrO2-RuO2-SnO2) plates and pure titanium plates were used as the anode and cathode, respectively, for the generation of chlorine in the dye solution. For the anthraquinone dye Reactive Blue 19, 60.0% of the chemical oxygen demand (COD) and 22.0% of the total organic carbon (TOC) were removed using this system. A comparison of the direct current electrolysis and pulsed discharge revealed that using the pulsed discharge method reduced the energy cost by 68.6%. UV-visible, LC-MS, and GC-MS were used to identify the intermediate compounds formed during the degradation of Reactive Blue 19. The results indicate that in the process of oxidation by chlorine/hypochlorite, the chromophore group was first oxidized to -NH2, followed by decolorization via chlorination of the aromatic rings. The results confirm that low-voltage pulse electrolysis can be used for the degradation of industrial dyes in waste effluents. Practitioner pointsLow-voltage pulse electrolysis can be used for the degradation of industrial dyes and/or dyes in waste effluents. For anionic dye Reactive Blue 19, 60.0% of COD and 22.0% of TOC were removed using low-voltage (20.0 V) pulse electrolysis. The pulsed discharge method reduced the energy cost of this degradation process by 68.6% compared with direct current electrolysis. The intermediate compounds formed during the degradation of Reactive Blue 19 were confirmed by UV-visible spectroscopy, LC-MS, and GC-MS.