高压放电等离子体协同过硫酸盐降解水中偶氮染料RR120

Degradation of Azo Dye RR120 by High Voltage Discharge Plasma and Persulfate

研究了高压放电等离子体协同过硫酸盐对水中偶氮染料RR120的降解,与单独高压放电等离子体体系和单独过硫酸盐体系降解偶氮染料RR120相比,高压放电等离子体协同过硫酸盐降解RR120的降解效率分别提高了21.5%和98.0%。解析了初始pH、放电功率、初始浓度以及过硫酸盐添加量对RR120降解效率的影响,研究结果表明,放电功率65 W、酸性条件、过硫酸盐添加量为4 mmol/L时RR120的降解效率最高;偶氮染料RR120降解过程中溶液的pH值逐渐降低、电导率增加;RR120降解过程中发生了脱氯反应。

The degradation of RR120 in water by high voltage discharge plasma and persulfate was studied.Compared with the single high-voltage discharge plasma system and the single persulfate system,the degradation efficiency of RR120 caused by the high voltage discharge plasma with persulfate was increased by 21. 5% and 98. 0%,respectively. The effects of initial pH,discharge power,initial concentration and the addition of persulfate on the degradation efficiency of RR120 were also discussed. The results showed that the discharge power of 65 W,acidic conditions,and the addition of sulfates of 4 mmol/L were the best conditions. In the process of synergetic degradation RR120,the pH value of RR120 aqueous solution decreased and the conductivity increased steadily. Dechlorination reaction occurred during RR120 degradation process.