高压电弧放电处理偶氮染料废水  

Treatment of azo dye wastewater by high-voltage arc discharge nonthermal plasma

作　　者：武海霞[1,2] 徐炎华[1,2] 方志[3] 雷枭[3] 刘瑞菊[1] 蒋蓓蕾[1] 

机构地区：[1]南京工业大学环境学院,南京210009 [2]江苏省工业节水减排重点实验室,南京210009 [3]南京工业大学自动化与电气工程学院,南京210009

出　　处：《环境工程学报》2012年第12期4327-4332,共6页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07101-003);南京工业大学学科基金项目;南京工业大学实验室开放项目

摘　　要：用高压电弧放电产生的低温等离子体对含偶氮染料的废水进行了处理,以甲基橙为例研究了电压幅值、处理时间、溶液初始浓度、溶液初始pH值、投加Fe2+和Fe3+对染料脱色的影响。实验结果表明,甲基橙浓度为50 mg/L时其降解率随时间和电压幅值的增加而增加。溶液初始浓度对染料去除效果影响较为明显,同等条件下初始浓度越低降解率越高。酸性条件下有利于低温等离子体处理甲基橙。Fe2+和Fe3+对低温等离子体降解甲基橙有一定的催化作用。电压8 kV处理3 min,Fe2+为20 mg/L时去除率由89.64%增至99.72%。Fe2(SO4)3的最佳投加量为5 mg/L(以Fe3+计),而FeCl3的最佳投加量为80 mg/L(以Fe3+计)。The nonthermal plasma technology using high-voltage arc discharge was investigated for the treat- ment of azo dye wastewater. Methyl orange solution was selected as the example to investigate the decolorization. The effects of power voltage, plasma-treatment time, different initial concentration of dye solutions, pH and addi- tion of catalysts （Fe2 ＋ and Fe3 ＋ ） on the decolorization were studied. The experimental results indicated that abatement of 50 mg/L methyl orange wastewater increased with the discharging time and power voltage. The ini- tial concentration had a significant impact on the removl of dye. Under the same conditions, higher decolorization was obtained when the initial concentration was lower. It was found that the extent of decolorization increased with the decrease of initial pH of dye solutions and the addition of Fe2＋ and Fe3＋. About 99.72% of dye was re- moved after 3 min plasma-treatment with concentration of 20 mg/L initial Fe2 ＋ , at voltage of 8 kV. In the ab- sence of catalyst,the removal of dye reached 89.64%. The best dosage of Fe2 （SO4 ）3 was 5 mg/L （calculated by the concentration of Fe3＋ ） , while FeC13 was 80 mg/L （calculated by the concentration of Fe3＋ ）.

关 键 词：电弧放电 等离子体 偶氮染料 降解 

分 类 号：X703[环境科学与工程—环境工程]