亚甲基蓝模拟废水的电化学处理

Electrochemical treatment of methylene blue in simulation wastewater

为了探讨电化学法处理亚甲基蓝模拟废水的影响因素,采用钛钌电极做阳极,钢板做阴极,处理亚甲基蓝模拟废水,考察了外加电压、电解质种类、电解质浓度、极板间距、原水浓度及电解时间对处理效果的影响.结果表明:最佳电化学处理条件为外加电压7 V,电解质NaCl浓度0.02 mol/L,极板间距2 cm,原水质量浓度200 mg/L,电解时间2 h,在不改变室温和原水pH值的条件下,电化学处理亚甲基蓝的脱色率可达98.4%.因此,电化学处理亚甲基蓝模拟废水,影响亚甲基蓝脱色的主要因素有外加电压、电解质种类及其浓度、极板间距及电解时间,原水浓度也有一定的影响.

In order to study the influence factors of electrochemical treatment of methylene blue, wastewater containing methylene blue was treated by the electrochemical method, with Ti/RuO2 as anode and steel electrode as cathode. Experiments were done to study the removal efficiency of applied voltage, the kind and concentration of electrolyte, space between electrodes, initial concentration of dye and electrolysis time. Results show that the optimum conditions are voltage 7 V, NaCl 0.02 mol/L, space between electrodes 2 cm, initial concentration of methylene blue 200 mg/L, electrolysis time 2 h. The removal rate of methylene blue reaches 98.4% after 2 hours electrochemical treatment under the optimum conditions and certain room temperature and pH. Therefore, the main influence factors of electrochemical treatment of methylene blue include applied voltage ,the kind and concentration of electrolyte, space between electrodes and electrolysis time. The initial concentration of dye also has certain effect on the removal efficiency.