Sevimli M F, Kinaci C
Selcuk University, Engineering & Architectural Faculty, Department of Civil Engineering, Campus, Konya, Turkey.
Water Sci Technol. 2002;45(12):279-86.
The aim of this study is to investigate the effect of some operational parameters on the efficiency of ozonation and Fenton's process for decolorization and COD removal. Acid Red 337 and Reactive Orange 16 dye solutions and the effluents of acid and reactive dye-bath effluents were used in the experiments. The influence of ozone dose and pH for color and COD removal from the wastewater were studied. Increasing the ozone dose increased the rate constants, and color and COD removal efficiencies. Ozone consumption ratio per unit color and COD removal at any time was found to be almost the same while the applied ozone dose was different. pH did not significantly affect color and COD removal from the wastewater by ozonation. In spite of having high color removal efficiencies (60-91%), limited COD removal efficiencies between 9-17% at 30 minutes ozonation time were obtained. In the Fenton oxidation experiments, the effects of pH, temperature, dosage of ferrous sulfate and hydrogen peroxide, and the proper ratio of Fe(II)/H2O2 were studied. The result indicates that up to 99% color removal and 82% COD removal can be obtained by Fenton's oxidation. While Fenton's oxidation was greatly affected by the pH value, temperature of wastewater did not significantly affect the Fenton process for color removal. Increasing the dose of both hydrogen peroxide and ferrous sulfate enhanced the removal efficiencies of color and COD. Suitable ratios of Fe(II)/H2O2 were found to be between 0.5 and 0.83.
本研究旨在探讨一些操作参数对臭氧化和芬顿法脱色及去除化学需氧量（COD）效率的影响。实验中使用了酸性红337和活性橙16染料溶液以及酸性和活性染料浴废水的流出物。研究了臭氧剂量和pH值对废水中颜色和COD去除的影响。增加臭氧剂量会提高速率常数以及颜色和COD去除效率。发现单位颜色和COD去除在任何时候的臭氧消耗率几乎相同，而施加的臭氧剂量不同。pH值对臭氧化去除废水中的颜色和COD没有显著影响。尽管具有较高的脱色效率（60 - 91%），但在30分钟臭氧化时间内，COD去除效率有限，为9 - 17%。在芬顿氧化实验中，研究了pH值、温度、硫酸亚铁和过氧化氢的用量以及Fe(II)/H₂O₂的合适比例的影响。结果表明，通过芬顿氧化可实现高达99%的脱色率和82%的COD去除率。虽然芬顿氧化受pH值影响很大，但废水温度对芬顿法脱色没有显著影响。增加过氧化氢和硫酸亚铁的用量可提高颜色和COD的去除效率。发现Fe(II)/H₂O₂的合适比例在0.5至0.83之间。
