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N-N二甲基甲酰胺(DMF)和N-N二甲基乙酰胺(DMAC)是化纤废水的主要污染物,具有毒性大,生物难降解,污染时效长的特点.本文研究了Fenton试剂法处理DMF和DMAC的效果,探讨了最佳处理条件及降解机理.结果表明:在pH=3,反应时间30min,原水浓度为250mg/L和500mg/L,H2O2投加量为3ml/L和5ml/L,FeSO4·7H2O投加量为1500mg/L和2000mg/L的条件下,DMF和DMAC的去除率达到49.70%和44.40%.通过紫外-可见光谱分析,可知Fenton试剂法破坏酰胺基团,将大分子物质破坏为小分子物质,为后续的生化处理提供条件.
NN dimethylformamide (DMF) and NN dimethylacetamide (DMAC) are the main pollutants of chemical fiber wastewater, which have the characteristics of high toxicity, difficult biodegradation and long-term pollution.In this paper, the effects of DMF and DMAC, the optimum treatment conditions and degradation mechanism were discussed.The results showed that when the raw water concentration was 250mg / L and 500mg / L, the dosage of H2O2 was 3ml / L and 5ml / L at pH = 3 and reaction time 30min, Under the conditions of 1500mg / L and 2000mg / L FeSO4 · 7H2O, the removal rates of DMF and DMAC reached 49.70% and 44.40%, respectively.The results of UV-Vis spectroscopy showed that the Fenton reagent destroys the amide group, Material damage to small molecules, the conditions for the follow-up of biochemical treatment.