Ma Jun, Shi Fenghua
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Huan Jing Ke Xue. 2002 Sep;23(5):67-71.
Comparative experiments of ozonation and O3/H2O2 processes were conducted with nitrobenzene as the model organic pollutant. It was found that O3/H2O2 greatly increased the removal efficiency of nitrobenzene compared with that achieved by ozonation alone. It was believed that both in ozonation and O3/H2O2 processes nitrobenzene was primarily oxidized by OH.. Several factors that are likely to influence O3/H2O2 process in practical application were investigated. Experimental results demonstrated that with the same dosage of applied ozone and hydrogen peroxide, the multiple steps addition of ozone and hydrogen peroxide showed a much higher removal efficiency than that obtained by adding hydrogen peroxide within one step before the start of the experiment. Under the conditions of this experiment, the optimum molar ratios of hydrogen peroxide to ozone for the removal of nitrobenzene in distilled water and tap water were proved to be both 0.5, no significant negative effect was observed when the alkalinity levels (as CaCO3) were less than 100 mg/L.
以硝基苯作为模型有机污染物进行了臭氧化和O3/H2O2工艺的对比实验。结果发现，与单独臭氧化相比，O3/H2O2极大地提高了硝基苯的去除效率。据信，在臭氧化和O3/H2O2工艺中，硝基苯主要被·OH氧化。研究了在实际应用中可能影响O3/H2O2工艺的几个因素。实验结果表明，在臭氧和过氧化氢投加量相同的情况下，臭氧和过氧化氢分步投加比在实验开始前一次性投加过氧化氢具有更高的去除效率。在本实验条件下，蒸馏水和自来水中去除硝基苯的过氧化氢与臭氧的最佳摩尔比均为0.5，当碱度（以CaCO3计）小于100mg/L时未观察到明显的负面影响。
