超声、臭氧、光催化及其组合工艺处理苯酚废水

研究了在一定条件下,超声、臭氧、光催化等高级氧化技术的不同组合方法对苯酚的降解效果。结果表明,对于质量浓度为100 mg/L的苯酚溶液,反应时间为1 h时,超声、臭氧氧化、光催化三者单独降解率分别为8%、36%、35%。紫外光光催化分别与超声波或臭氧组合对苯酚降解有一定的协同作用,降解率分别为50%、78%;而声光催化技术与臭氧三者组合降解苯酚的效果尤佳,降解率达到85%。这归功于超声波的机械作用对臭氧扩散引起的积极作用以及声光催化协同产生的H2O2,从而生成的羟基自由基。

Treatment of phenol-containing wastewater by ultrasound, ozone, photocatalysis and combined process

The effects of the different combination methods with ultrosound,ozone,photocatalysis and some other advanced oxidation processes on the degradation of phenol under certain condition were studied.The results showed that,treating phenol-containing solution which mass concentation was 100 mg/L by ultrosound,ozone and photocatalysis individually,after 1 h of reaction,the degradation rate were 8%、36%、35% respectively.Photocata-lysis,however,was found to induce a synergistic effect when applied in combination with either ultrasound or ozone,the degradation rate were 50% and 78%;while,the degradation effect could be even better if the said three processes were used in combination,the degradation rate reached 85%,which was owed to the mechnical effect of the ultra-sound improving the ozone dispersion and the hydroxyl free radicals produced by ultrasound-photocatalytic generated H2O2.