高铁酸钾氧化处理苯酚废水的研究

Study on treatment of phenol wastewater using potassium ferrate(Ⅵ)

采用高铁酸钾氧化法处理了具有难生化特性的苯酚废水,以期为该废水提供一种高效经济的处理方法。研究了高铁酸钾加入量、pH值、反应时间、苯酚初始浓度和稳定剂对苯酚废水处理效果的影响。实验结果表明,高铁酸钾投加量为1.2 g/L,pH值为4,反应30 min,初始苯酚浓度为100 mg/L时处理效果最好。所考察的稳定剂包括HAC、Na2SiO3、Na3PO4和Na2MoO4,其中投加2.4 mg/L时高铁酸钾和3 mg/L时高铁酸钾均能获得较好的处理效果。在优化的实验条件下,COD去除率达到54%以上。

Potassium ferrate（Ⅵ） oxidation process was employed to treat the bio-refractory wastewater containing phenol for the purpose of presenting a high-performance and economical alternative for this wastewater.The effects of potassium ferrate dosage,pH value,reaction time,initial phenol concentration and stabilizers on the treatment efficiency were investigated.The results showed that the best treatment was obtained under the conditions： potassium ferrate dosage of 1.2 g/L,pH 4,reaction time of 30 min and initial phenol concentration of 100 mg/L.The investigated stabilizers included HAC,Na2SiO3,Na3PO4 and Na2MoO4,and among these stabilizers,both acetate of 2.4 mg/L and sodium silicate of 3 mg/L could lead to a better treatment.In addition,a COD removal efficiency of higher than 54% could be achieved under the optimum conditions.