ABSTRACT With the development of the dye industry, the treatment of dye wastewater needs to be solved urgently. In this work, conventional ozonation and peroxone (O3/H2O2) processes were used to treat the Direct Red 80 dye wastewater, and the influence of relevant factors of the treatment efficiency was analyzed by using physicochemical methods including UV-visible absorption spectrum, three-dimensional fluorescence spectrum and ion chromatography. Through analysis of the oxidation mechanism under ozone treatment, a possible degradation pathway of Direct Red 80 was deduced. The results show that the decolorization rate of 100 mg/L dye wastewater after oxidation by ozone is 99%, and at pH = 12, the chemical oxygen demand (COD) removal rate is highest to 27.4%. In the process of peroxone (O3/H2O2), under the same pH condition, when the dosing ratio of hydrogen peroxide and ozone is fixed at 1:10500, the chemical oxygen demand (COD) removal rate of Direct Red 80 dye wastewater can reach 40%, and under this ratio of addition, when the pH is 13, the chemical oxygen demand (COD) removal rate is the highest at 43%. These results indicated that the peroxone (O3/H2O2) process of Direct Red 80 dye wastewater is better than ozone oxidation alone, and in both systems, the alkaline environment is more conducive to the decolorization and degradation of Direct Red 80 dye.

中文翻译：

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常规臭氧化和过氧酮（O3 / H2O2）处理直接红80染料的效率和机理研究

摘要随着染料工业的发展，染料废水的处理迫在眉睫。在这项工作中，采用常规的臭氧氧化和过氧二氧（O3 / H2O2）工艺处理直接红80染料废水，并通过物理化学方法（包括紫外可见吸收光谱，三重紫外光吸收光谱法）分析了处理效率的相关因素的影响。维荧光光谱和离子色谱。通过分析臭氧处理下的氧化机理，推导了直接红80的可能降解途径。结果表明：100 mg / L染料废水经臭氧氧化后的脱色率为99％，在pH = 12时，化学需氧量（COD）去除率最高，达到27.4％。在过氧磷（O3 / H2O2）的过程中，在相同的pH条件下，当过氧化氢和臭氧的投料比例固定为1：10500时，直接红80染料废水的化学需氧量（COD）去除率可以达到40％，并且在此添加比例下，当pH为13时，化学需氧量（COD）去除率最高，为43％。这些结果表明，直接红80染料废水中的过氧化物（O3 / H2O2）工艺优于单独的臭氧氧化，并且在这两个系统中，碱性环境都更有利于直接红80染料的脱色和降解。