The leather industry wastewater was degraded by ultrasound-Fenton oxidation method.The effects of treating factors including ultrasound power,H2O2 concentration,FeSO4·7H2O concentration,initial pH value and reaction time on the removal rates of COD were investigated by the single factor method.Five factors and four levels were selected for orthogonal experiments to optimize the oxidative degradation process.The results show that under the conditions of n(H2O2)/n(FeSO4·7H2O)2.5∶1,ultrasonic power 600 W,pH3.0 and 30 min,the COD removal rate could reach up to 80.44％.The reaction kinetics was investigated under the optimal conditions.The results show that the degradation of COD in the wastewater by ultrasound-Fenton oxidation process was in conformity with the pseudo-first order kinetics.In addition,the kinetics enhancement factor could reach 143％.The COD removal rate by ultrasound-Fenton process has an obvious synergistic effect.
关键词
超声/芬顿/皮革工业废水/协同作用
Key words
ultrasound/Fenton/leather industry wastewater/synergistic effect
维普
万方数据