超声波辅助球磨法降解偶氮染料废水  

Degradation of Azo Dye in Wastewater by Ultrasonic Assisted Ball Milling

作　　者：傅定发[1] 马鑫 陈鼎[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2017年第12期82-88,共7页Journal of Hunan University:Natural Sciences

摘　　要：采用超声波辅助球磨工艺降解刚果红.在超声波的空化作用以及零价铁的化学作用和机械力化学的作用下,溶液中的羟基自由基浓度明显提高;在羟基自由基的强氧化作用以及反应过程中剥落的纳米级的零价铁的还原作用下,反应速度明显加快,并应对反映起促进作用.在2 min时刚果红去除率达99%,10 min时大部分有机物被矿化,总碳含量(TOC)的去除率达到80%.在高浓度的条件下,降解效率明显并且降解的效果更加彻底,而且成本较低,操作简便环保.结果表明超声波辅助球磨工艺在降解偶氮染料废水中有巨大的应用价值.Azo dye is a common pollutant, and many the ultrasonic assisted ball milling technology was used researchers tocus on its treatment. In tris stuay, to degradate the Congo red. With the combination of ultrasonic cavitation,effect of zero valence iron and mechanical chemistry, the hydroxyl radical concen- tration increased significantly in solution. Then, reaction speed was apparently accelerated under the oxida- tion of hydroxyl radical and the reaction of nano iron. Eventually, the removal rate of Congo red reached 99~ within 2 minutes. Most of the organic matters were mineralized,and the removal rate of total carbon （TOC） reached 80~ with 10 min. The degradation efficiency increased significantly and the degradation effect was more thorough under high concentration. It is a cost-effective, simple and environmental method. All these indicated the ultrasonic assisted ball milling process is valuable to be applied tO the degradation of azo dye wastewater.

关 键 词：超声波辅助球磨 纳米零价铁 羟基自由基 偶氮染料 氧化还原 超声空化 

分 类 号：O644[理学—物理化学]