黄铜矿催化异相类Fenton反应处理染料废水研究

采用异相类Fenton反应处理染料废水，并以均相Fenton反应为对照，考察废水初始pH值、催化剂投加量、H₂O₂投加浓度和反应时间对处理效果的影响，测定了反应过程中铁离子和剩余H₂O₂浓度的变化情况。结果表明，对于试验用实际染料废水，均相Fenton反应适宜的pH范围为3~8，七水合硫酸亚铁投加量为2 g/L，H₂O₂投加浓度为20 mmol/L，反应时间为2 h时，COD去除率与色度去除率最高能达到59.39%和97.71%；异相类Fenton反应在废水初始pH=3时处理效果最佳，黄铜矿投加量为9 g/L，H₂O₂投加浓度为20 mmol/L，反应时间4 h时，COD去除率与色度去除率分别为56.03%和93.79%。均相和异相类Fenton反应处理染料废水过程中生成的·OH能降解有机污染物。

Treatment of Dyeing Wastewater by Chalcopyrite Catalyzed Fenton-like Reaction

The dyeing wastewater was treate by Fenton-like oxidation to investigate the effects of wastewater initial pH, catalyst dosage,H2 O2 dosage and reaction time by contrasting with that of Fenton reaction. And the variation of iron concentra-tion and H2 O2 dosage in Fenton and Fenton-like process were also explored. Experimental results showed that under condtions of the pH range of Fenton oxidation from 3 to 8,at ferrous sulfate dosage of 2 g/L,H2 O2 dosage of 20 mmol/L and reaction time 2 h,COD removal is 59. 39% and decolorization is 97. 71% in Fenton reaction. At chalcopyrite dosage of 9 g/L,H2 O2 dosage of 20 mmol/L,pH=3 and reaction time 4 h,COD removal is 56. 03% and decolorization is 93. 79% in Fenton-like re-action. It was also found that the · OH ion which is generated by Fenton and Fenton-like reaction in treating the dyeing wastewater could degradate organic pollutants.