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研究了臭氧氧化4-氯酚的去除效果,探讨了臭氧氧化4-氯酚的反应机理和反应特性.臭氧氧化涉及两种强氧化剂,臭氧分子和羟基自由基.实验结果表明,当溶液中没有清除剂清除羟基自由基时,臭氧氧化4-氯酚产生中间产物过氧化氢,pH中性条件下,过氧化氢和臭氧分子联合作用生成较多的羟基自由基,113mg/L的臭氧投加量能完全去除浓度为20mg/L的4-氯酚以及39%的TOC.溶液中完全清除羟基自由基后,臭氧分子也可以高效去除4-氯酚,4-氯酚先被氧化成黄色的对苯醌,进而转化成甲酸和乙二酸.提出了臭氧分子以及O3/OH?联合氧化4-氯酚的两种反应途径.臭氧氧化是一种高效去除4-氯酚的方法,具有良好的应用前景.
The removal mechanism of ozonation of 4-chlorophenol was studied, and the reaction mechanism and reaction characteristics of ozonation of 4-chlorophenol were discussed.Ozone oxidation involves two kinds of strong oxidants, ozone molecules and hydroxyl radicals.The experimental results show that when no When the scavenger scavenges hydroxyl radicals, ozonation of 4-chlorophenol produces intermediate hydrogen peroxide. Under pH-neutral condition, hydrogen peroxide and ozone molecules produce more hydroxyl radicals by combined action. 113mg / L of ozone is added The amount of 4-chlorophenol at a concentration of 20 mg / L and the TOC of 39% can be completely removed, and after the hydroxyl radical is completely eliminated from the solution, the ozone molecule can also efficiently remove 4-chlorophenol and the 4-chlorophenol is oxidized to a yellow P-benzoquinone, and then to formic acid and oxalic acid, and proposed two reaction routes of ozone molecules and O3 / OH? Combined oxidation of 4-chlorophenol.Ozone oxidation is a method of efficiently removing 4-chlorophenol and has good The application prospects.