摘要：

采用纳米Fe₃O₄/聚合氯化铝（PAC）混凝和催化氧化技术处理新型制药废水（羧甲基壳聚糖季铵盐类），COD_Cr为5 500~6 000 mg/L。当pH 5~6，PAC投加质量浓度为1.2 g/L，Fe₃O₄投加质量浓度为0.8 g/L时，混凝段COD_Cr去除率为45.8%；当Fe²⁺投加质量浓度为2 g/L，过硫酸钠投加质量浓度为2~3 g/L时，反应时间为8 h，氧化段COD_Cr去除率为60.40%；实验对COD_Cr的总去除率87.78%。废水的COD_Cr降低到700~1 000 mg/L。

关键词: 混凝, 催化氧化, 废水处理

Abstract:

Nano Fe₃O₄/polyaluminum chloride(PAC) coagulation and catalytic oxidation technology for treating pharmaceutical wastewater (carboxymethyl chitosan quaternary ammonium salt) with COD_Cr of 5 500-6 000 mg/L. Under the condition of pH 5-6, the dosage of PAC 1.2 g/L, and the Fe₃O₄ dosage 0.8 g/L, the removal rate of COD_Cr in the flocculation section was 45.8%. With the condition Fe²⁺ dosage 2 g/L, sodium persulfate dosage 2-3 g/L, reaction time 8 h, the COD_Cr removal rate in the oxidation stage was 60.40%, and the total removal rate of COD_Cr in the experiment was 87.78%. The COD_Cr of the wastewater reduced to 700-1 000 mg/L.

Key words: coagulation, catalytic oxidation, wastewater treatment

中图分类号: 

• X703