电镀铬镍混合废水的絮凝处理  

Flocculation Treatment for Chromium-nickel Mixed Electroplating Wastewater

作　　者：刘存海[1] 韩利萍[1] 赖小娟[1] 

机构地区：[1]陕西科技大学化学与化工学院教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《电镀与精饰》2012年第9期39-42,46,共5页Plating & Finishing

基　　金：国家自然科学基金项目(51103081)

摘　　要：采用化学絮凝法对电镀含铬、镍废水进行了处理,确定了复合絮凝剂的种类和最佳配比,选择了最佳工艺条件,pH=8.70,搅拌t为30min,絮凝沉积t为12h,并对处理前后铬镍废水的质量浓度进行了检测。结果表明,铬的去除率为99.93%,镍的去除率为99.95%,处理后的废水中铬质量浓度降至0.12mg/L,镍质量浓度降至0.26mg/L,符合国家允许的排放标准,可作为电镀车间的循环用水。Chromium nickel mixed electroplating wastewater was treated by chemical flocculation method. Flocculating agent species and the best mixture ratio were identified, and the optimum processing condi- tions was obtained as following ： pH value of 8.20, stirring time of 30 min, and flocculation deposition time of 12 h. Contents of chromium and nickel in the wasterwater before and after the treatment were also deter- mined. Results indicated that removal rates of chromium and nickel were 99.92% and 99.38% separate- ly. Contents of chromium and nickel after the processing were decreased to 0.12 mg/L and 0.26 mg/L, which were much lower than that in GB standards and could be used as industrial circulating water for the electroplating workshop.

关 键 词：电镀废水 复合絮凝剂 铬 镍离子 去除率 

分 类 号：X781.1[环境科学与工程—环境工程]