Abstract: High-concentration wastewater from bromhexine hydrochloride production has been pretreated by Fenton oxidation-adsorption method,and the optimal reaction time,dosages and proportions of chemicals determined. The results show that the optimal reaction conditions are as follows,m(H₂O₂):m(Fe²⁺) is about 2.19,the dosages of Fenton reagent FeSO₄·7H₂O and H₂O₂ are 35 g/L and 100 mL/L,respectively,and the reaction time is about 3 h. In addition, the results also show that after Fenton oxidation and readjusting pH to neutral,the removing effect of adding calcium-based bentonite for adsorption is better than that of adding coagulant. Under optimal conditions,the treated COD of the real wastewater(37 600 mg/L) from bromhexine hydrochloride production is reduced by 80.53%,having good treatment effect.

Key words: Fenton oxidation, adsorption, pretreatment, wastewater from bromhexine hydrochloride production

摘要： 采用Fenton氧化-吸附法对高浓度盐酸溴己新生产废水进行预处理，通过试验确定其最佳反应时间、最佳药剂投加量及比例。结果表明，最佳反应条件：H₂O₂与Fe²⁺质量比为2.19左右，Fenton试剂中FeSO₄·7H₂O和H₂O₂的最佳投加量分别为35 g/L和100 mL/L，反应时间为3 h。同时，经Fenton氧化并pH调回中性后投加钙基膨润土进行吸附相对于投加混凝剂有更好的去除效果。在此最佳条件下处理COD为37 600 mg/L的实际盐酸溴己新生产废水，COD降低80.53%，处理效果良好。

关键词: Fenton氧化, 吸附, 预处理, 盐酸溴己新生产废水

CLC Number: 

• X703

• TQ424