载锰污泥活性炭催化臭氧氧化草酸废水的研究

为研究在催化臭氧化过程中,载锰污泥活性炭对草酸废水降解的催化效果,以及为污泥的资源化探索一条新途径,本实验采用连续流臭氧氧化实验,通过单因素实验方法考察了载锰污泥活性炭催化臭氧化反应的主要影响因素及最佳反应条件,同时对催化臭氧化反应机理进行了探讨。结果表明:在臭氧浓度为5.0 mg/L,载锰污泥活性炭投加量为100 mg/L,pH值为3.5的最佳反应条件下,60 min内草酸的去除率最高达91.2%。叔丁醇对草酸降解具有抑制作用,催化臭氧化反应符合羟基自由基的反应机制。该方法的处理效果较为明显,对评价催化臭氧法的效果具有较明显的参考价值。

Research on the catalytic ozonation of oxalic acid in wastewater with manganese loaded sludge activated carbon as catalyst

In order to study the catalytic effects of manganese-loading sludge activated carbon on oxalic acid wastewater degradation in the catalytic ozonation processes and to explore a new way on resources recovery of sludge, the continuous flow of ozone oxidation methods were conducted in the expereiments, and the main influence factors and the best reaction conditions of manganese loaded sludge activated carbon catalytic ozonation were investigated by the single factor experimental methods, and the reaction mechanisms of catalytic ozonation were discussed. The results demonstrated that the oxalic acid wastewater had the highest removal rate at 91.2% within 60 min under the best reaction conditions of the ozone concentration being 5.0 mg/L, the dosage of manganese loaded sludge activated carbon being 100 mg/L, and the pH being 3.5. Tert-butyl alcohol had inhibitory effects on degradation of oxalic acid, catalytic ozonation conforms to hydroxyl free radical reaction mechanism. The treatment effects of the method was obvious and itis a significant reference to evaluate the effects of catalytic ozonation.