酸性大红G染色废水的超声波-Fenton降解

以酸性大红G模拟印染废水作为研究对象,对超声波耦合Fenton试剂降解酸性大红G的脱色反应过程进行研究,考察了硫酸亚铁和双氧水用量、废水初始pH值对反应过程及污染物降解的影响。结果表明,当染料质量浓度为100 mg/L时,在Fe2+质量浓度为8 mg/L,H2O2质量浓度为380 mg/L,废水初始pH值为3.0的优化条件下,超声反应120 min,色度和COD去除率分别可达到93.98%和60.9%。紫外-可见光图谱显示,酸性大红G降解过程中,其共轭偶氮双键、苯环、萘环均遭到破坏。酸性大红G的脱色反应过程服从二级反应动力学。

Degradation of acid scarlet G effluent by ultrasound/Fenton method

The degradation process of Acid scarlet G effluent by ultrasound/Fenton method was carried out. Effects of Fe~(2+) concentration, H_2O_2 concentration, and initial pH value on the oxidation process and the degradation efficiency were studied.The results indicated that 93.98% of colour reduction and 60.9% of COD removal were achieved with the 100 mg/L initial dye concentration under the following optimal conditions: Fe~(2+) 8 mg/L, H_2O_2 380 mg/L and initial pH value 3.0,decoloration time 120 minutes. UV-Vis spectrum showed that the conjugated structure of azo group,benzene ring and naphthalene ring of dye were destroyed. The degradation of Acid scarlet G by ultrasound/Fenton method followed the second-order kinetics.