微波诱导氧化法处理BF-BR染料废水

Study on Microwave Induced Oxidation Process for Dye Wastewater Treatment

以亚铁改性活性炭为催化剂,采用微波诱导氧化工艺(MIOP)处理雅格素蓝(BF-BR)染料模拟废水,结果表明最佳工艺条件为:固液比1∶10(5.0g改性活性炭与50mLBF-BR溶液混合),微波功率500W,辐照时间5min,此时对BF-BR的脱色率可达99%,对COD的去除率为96 8%。动力学研究表明,该氧化过程符合一级反应动力学规律,其动力学方程为:lnC=0.7345t+lnC0(r=0.991),反应速率常数=0.7345/min,半衰期为0 95min。此外,微波诱导氧化对BF-BR的处理效果优于活性炭吸附和单纯的微波加热,这是活性炭吸附和微波诱导氧化协同作用的结果。

By using ferrous-modified activated carbon as catalyst, microwave induced oxidation process (MIOP) was used to treat the simulated Argazol Blue (BF-BR) dye wastewater. The result showed that under the optimum condition of solid/liquid ratio 1∶10 (5.0 g modified activated carbon mixed with 50 mL BF-BR solution), microwave power 500 W, and irradiation time 5 min, the decolorization rate of BF-BR can come up to 99% and COD removal rate up to 96.8%. Kinetics study indicated that the oxidation process accords with the first order reaction kinetics, with the kinetics equation given as follows: ln C = 0.734 5 t + ln C_0 (r =( 0.991)), reaction velocity constant = 0.734 5 min^(-1), half life = 0.95 min. According to the further investigation, use of MIOP for treatment of BF-BR is more effective than that of activated carbon adsorption and simple microwave heating, and it is attributed to the cooperation of activated carbon adsorption with microwave induced oxidation.