摘要
分别研究了电絮凝技术和三维电极技术对含镍电镀废水的去除效果。在初始pH为3、初始镍浓度为120.7 mg/L、电流密度为6 mA/cm^2、反应25 min的条件下,电絮凝技术的镍去除率在90%以上。考察了影响三维电极处理的因素,包括活性炭吸附、搅拌、电压和进水镍浓度。在操作电压为6 V、反应120 min的条件下,三维电极技术可将初始镍浓度为10 mg/L和20 mg/L的电镀废水分别降低至0.1 mg/L和0.2 mg/L以下。利用电絮凝-三维电极联合技术处理含镍电镀废水,运行7个周期内出水总镍浓度均低于0.15 mg/L。
The treatment of nickel-containing wastewater discharged from electroplating process was conducted by electro- coagulation and three-dimensional electrode technique, respectively. The removal efficiency of nickel by electrocoagulation is higher than 90% at pH 3 and current density 6 mA/cm2 within 25 min for an influent containing 120.7 mg/L of nickel. The factors affecting the three-dimensional electrode treatment such as activated carbon adsorption, agitation, voltage and initial nickel concentration were examined. The nickel concentration after three-dimensional electrode treatment at a voltage of 6 V for 120 min is decreased to less than 0.1 mg/L for an influent containing 10 mg/L of nickel and to less than 0.2 mg/L for that containing 20 mg/L of nickel. The combination of electrocoagulation and three-dimensional electrode technique for treating the nickel-containing electroplating wastewater was studied, achieving total nickel concentration of effluent below 0.15 mg/L within seven operation cycles.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2017年第3期160-164,共5页
Electroplating & Finishing
基金
国家科技重大专项项目(2014ZX07204-008)子课题:电镀废水中毒害污染物全过程控制技术研究与工程示范(2014ZX07204-008-002)
关键词
电镀废水
镍
电絮凝
三维电极
处理
electroplating wastewater
nickel
electrocoagulation
three-dimensional electrode
treatment
