Abstract:

The treatment effect of coagulation on cypermethrin pesticide wastewater has been studied.The study shows that the coagulation effect of FeSO₄ is better than AlCl₃.When the best dosage of FeSO₄ solution,whose mass fraction is 10%,is 50 mL/L,and pH=8.1,the COD removal rate of the effluent could reach 57.8%.The pretreatment by coagulation could improve the sequent photocatalysis utilization rate of light.The coagulation pretreatment cooperates with TiO₂ photocatalysis.When the photocatalytic reaction time is 4 h,the effluent COD is 1 099 mg/L and the total COD removal rate could reach 75.8%.

Key words: cypermethrin, pesticides wastewater, coagulation, photocatalysis

摘要：

试验了混凝工艺对氯氰菊酯农药废水的处理效果。研究表明,FeSO₄的混凝效果优于AlCl₃,质量分数为10%的FeSO₄溶液最佳投药量为50 mL/L,反应最佳pH为8.1,出水COD去除率可达57.8%。混凝预处理可提高后续光催化反应的光利用率,混凝预处理与TiO₂光催化具有协同作用,当光催化反应时间为4 h时出水COD为1 099 mg/L,COD总去除率达75.8%。

关键词: 氯氰菊酯, 农药废水, 混凝, 光催化

CLC Number: 

• X703.1