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首页> 外文期刊>Journal of Hazardous Materials >The decolorization and mineralization of Acid Orange 6 azo dye in aqueous solution by advanced oxidation processes: A comparative study
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The decolorization and mineralization of Acid Orange 6 azo dye in aqueous solution by advanced oxidation processes: A comparative study

机译：酸性橙6偶氮染料在高级氧化过程中的脱色和矿化作用：比较研究

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The comparison of different advanced oxidation processes (AOPs), i.e. ultraviolet (UV)/TiO_2, O_3, O_3/UV, O_3/UV/TiO_2, Fenton and electroco-agulation (EC), is of interest to determine the best removal performance for the destruction of the target compound in an Acid Orange 6 (AO6) solution, exploring the most efficient experimental conditions as well; on the other hand, the results may provide baseline information of the combination of different AOPs in treating industrial wastewater. The following conclusions can be drawn: (1) in the effects of individual and combined ozonation and photocatalytic UV irradiation, both O_3/UV and O_3/UV/TiO_2 processes exhibit remarkable TOC removal capability that can achieve a 65% removal efficiency at pH 7 and O_3 dose = 45 mg/L; (2) the optimum pH and ratio of [H_2O_2]/[Fe~(2+)] found for the Fenton process, are pH 4 and [H_2O_2]/[Fe~(2+)] = 6.58. The optimum [H_2O_2] and [Fe~(2+)] under the same HF value are 58.82 and 8.93 mM, respectively; (3) the optimum applied voltage found in the EC experiment is 80 V, and the initial pH will affect the AO6 and TOC removal rates in that acidic conditions may be favorable for a higher removal rate; (4) the AO6 decolorization rate ranking was obtained in the order of O_3 < O_3/UV = O_3/UV/TiO_2 < EC < Fenton; (5) the ranking of TOC removal efficiency of selected AOPs was in the order of O_3 = Fenton < EC < O_3/UV < O_3/UV/TiO_2 for 30 min of reaction time.
机译：比较不同的高级氧化工艺（AOP），即紫外线（UV）/ TiO_2，O_3，O_3 / UV，O_3 / UV / TiO_2，Fenton和电凝聚（EC），可以确定最佳的去除性能。在酸性橙6（AO6）溶液中破坏目标化合物，并探索最有效的实验条件；另一方面，该结果可提供处理工业废水中不同AOP组合的基线信息。可以得出以下结论：（1）在单独和组合臭氧氧化和光催化UV辐射的影响下，O_3 / UV和O_3 / UV / TiO_2工艺均具有卓越的TOC去除能力，在pH 7时可以达到65％的去除效率。 O_3剂量= 45 mg / L； （2）对于Fenton法发现的最佳pH和[H_2O_2] / [Fe〜（2+）]的最佳pH为4，[H_2O_2] / [Fe〜（2+）] = 6.58。在相同的HF值下，最佳的[H_2O_2]和[Fe〜（2+）]分别为58.82和8.93mM。 （3）在EC实验中发现的最佳施加电压为80 V，初始pH将影响AO6和TOC的去除速率，因为酸性条件可能有利于更高的去除速率； （4）AO6的脱色率等级为O_3

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