摘要：

研究了高铁酸钾(K₂FeO₄)及高铁酸钾与次氯酸钠(NaClO)联用氧化分解废水中苯酚的效果,考察了K₂FeO₄和NaClO投加量、氧化反应时间和pH对苯酚和COD_Cr去除率的影响。结果表明:K₂FeO₄与NaClO联用处理苯酚废水存在明显的协同作用,当初始苯酚质量浓度为50 mg/L,pH为5左右,氧化反应时间为30 min,K₂FeO₄、NaClO投加量分别为1.5、0.3 g/L时,苯酚和COD_Cr去除率分别高达98%和68%以上,与单独使用K₂FeO₄相比,苯酚和COD_Cr去除率分别增加约5%和25%。K₂FeO₄与NaClO联用对苯酚的降解过程符合一级反应动力学模型。

关键词: 高铁酸钾, 次氯酸钠, 苯酚废水

Abstract:

The efficacy of using K₂FeO₄ and K₂FeO₄combined with NaC10 for the oxidative decomposition of phenol in wastewater has been studied. The effects of K₂FeO₄ and NaC10 dosages，oxidation time and pH on removing rates of phenol and COD_Cr. are investigated. The results show that there has been obvious synergy in using K₂FeO₄ tombined with NaC10 process. The removing rates of phenol and COD_Cr. could achieve above 98% and 68% respectively under the conditions that the concentration of phenol is 50 mg/L , pH 5 , reaction time 30 min，and dosages of K₂FeO₄and NaC10 are 1.5 g/L and 0.3g/L , respectively. Compared with the single use of K₂FeO₄，the removing rates of phenol and COD_Cr.have an increase of 5% and 25% ,respectively. The degradation course of phenol by using K₂FeO₄combined with NaC10 complies with the first order reaction kinetic model.

Key words: potassium ferrate (K₂FeO₄), sodium hypochlorite(NaC10), phenol-containing wastewater

中图分类号: 

• X703.1