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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Removal of Azo Dye C.I. Acid Red 14 from Contaminated Water using Fenton, UV/H_2O_2, UV/H_2O_2/Fe(Ⅱ), UV/H_2O_2/Fe(Ⅲ) and UV/H_2O_2/Fe(Ⅲ)/Oxalate Processes: A Comparative Study
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Removal of Azo Dye C.I. Acid Red 14 from Contaminated Water using Fenton, UV/H_2O_2, UV/H_2O_2/Fe(Ⅱ), UV/H_2O_2/Fe(Ⅲ) and UV/H_2O_2/Fe(Ⅲ)/Oxalate Processes: A Comparative Study

机译：去除偶氮染料C.I.使用Fenton，UV / H_2O_2，UV / H_2O_2 / Fe（Ⅱ），UV / H_2O_2 / Fe（Ⅲ）和UV / H_2O_2 / Fe（Ⅲ）/草酸盐工艺的污水中酸性红14的比较研究

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The decolorization of the solution containing a common textile and leather dye, C.I. Acid Red 14 (AR14), at pH 3 by hydrogen peroxide photolysis, Fenton, Fenton-like and photo-Fenton processes was studied. The dark and light reactions were carried out in stirred batch photoreactor equipped with an UV-C lamp (30 W) as UV light source. The experiments showed that the dye was resistant to the UV illumination, but was oxidized when one of Fe(Ⅱ), Fe(Ⅲ) and H_2O_2 compounds was present. It was also found that UV light irradiation can accelerate significantly the rate of AR14 decolorization in the presence of Fe(Ⅲ)/H_2O_2 or Fe(Ⅱ)/H_2O_2, comparing to that in the dark. The effect of different system variables like initial concentration of the azo dye, effect of UV light irradiation, initial concentration of Fe(Ⅱ) or Fe(Ⅲ) and added oxalate ion has been investigated. The results showed that the decolorization efficiency of AR14 at the reaction time of 2 min follows the decreasing order: UV/H_2O_2/Fe(Ⅲ)/oxalate > UV/H_2O_2/Fe(Ⅲ) > UV/H_2O_2/Fe(Ⅱ) > UV/H_2O_2. Our results also showed that the UV/H_2O_2/Fe(Ⅲ)/oxalate process was appropriate as the effective treatment method for decolorization of a real dyeing and finishing. The mechanism for each process is also discussed and linked together for understanding the observed differences in reactivity.
机译：含有普通纺织品和皮革染料C.I.的溶液的脱色通过过氧化氢，Fenton，类Fenton和光Fenton工艺研究了pH为3的酸性红14（AR14）。在配有UV-C灯（30W）作为UV光源的搅拌的间歇式光反应器中进行暗光反应。实验表明，该染料具有抗紫外线作用，但当存在Fe（Ⅱ），Fe（Ⅲ）和H_2O_2化合物之一时会被氧化。还发现与在黑暗中相比，在有Fe（Ⅲ）/ H_2O_2或Fe（Ⅱ）/ H_2O_2的情况下，紫外线照射可以显着加快AR14的脱色速度。研究了不同系统变量的影响，如偶氮染料的初始浓度，紫外光照射的影响，Fe（Ⅱ）或Fe（Ⅲ）的初始浓度以及草酸根离子的添加​​。结果表明，AR14在2 min反应时间的脱色效率依次为：UV / H_2O_2 / Fe（Ⅲ）/草酸盐> UV / H_2O_2 / Fe（Ⅲ）> UV / H_2O_2 / Fe（Ⅱ）> UV / H_2O_2。我们的结果还表明，UV / H_2O_2 / Fe（Ⅲ）/草酸盐工艺适合作为真正的染色和整理剂脱色的有效处理方法。还讨论了每个过程的机制并将其链接在一起，以了解所观察到的反应性差异。

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