论文部分内容阅读
分别采用混凝和Fenton对医药中间体废水进行预处理,探究了混凝剂的种类,Fenton反应的p H、反应过程中H2O2和Fe2+的摩尔比等因素对医药中间体废水预处理的影响,在适宜参数条件下比较了3种联合预处理方法对COD的去除效率。结果表明,最适混凝剂为聚合氯化铝铁(PAFC),其COD去除率为14.34%;Fenton氧化的适宜反应条件为:初始p H=3.5,n(H2O2)/n(Fe2+)为4。适宜条件下经过2 h的Fenton反应,COD去除量为5.675 g/L,去除率达26.03%。三者联合预处理效果顺序为2级Fenton>混凝+Fenton>Fenton+混凝,其中混凝+Fenton去除率为33.49%,二级Fenton为41.74%。
The coagulation and Fenton were used to pretreat the wastewater of pharmaceutical intermediates to explore the influence of coagulant species, p H of Fenton reaction, the molar ratio of H2O2 to Fe2 + during the reaction on the pretreatment of pharmaceutical intermediate wastewater, Under the appropriate parameters, the COD removal efficiencies of the three combined pretreatment methods were compared. The results showed that the optimal coagulant was PAFC, the removal rate of COD was 14.34%. The suitable reaction conditions for Fenton oxidation were: initial p H = 3.5, n (H2O2) / n (Fe2 +) 4. After 2 h Fenton reaction under suitable conditions, the removal rate of COD was 5.675 g / L and the removal rate reached 26.03%. The order of the three pretreatment was Fenton> Coagulation + Fenton> Fenton + coagulation, in which coagulation + Fenton removal rate was 33.49% and secondary Fenton was 41.74%.