PTFE膜系统分离电镀漂洗水中Ni^(2+)、Cu^(2+)的实验研究  

Treatment of Nickel-containing or Copper-containing Rinsing Water by PTFE Membrane System

作　　者：李静[1,2] 任源 吕斯濠 

机构地区：[1]华南理工大学,广东广州510006 [2]东莞市清洁生产科技中心,广东东莞523808 [3]东莞理工学院,广东东莞523808

出　　处：《广东化工》2017年第21期4-6,共3页Guangdong Chemical Industry

摘　　要：铜、镍为电镀废水中常见的金属离子,把其进行高效分离并回收,兼具环保与经济价值。本实验把PTFE中空纤维膜过滤系统嵌入到电镀工序的清洗线中,进行在线分离电镀漂洗水中常见的镍、铜离子。通过测定膜通量的变化及截留率效果,得到膜系统在室温下的主要运行条件:膜系统的最佳操作压力条件是0.7~0.8 MPa;膜系统的纯水通量为150 L/(m^2·h)时,Ni离子水样的平均截留率94.02%,Cu离子水样的平均截留率97.09%;Ni离子浓度最高为390.45 mg/L的水样,过滤时间t在55 min后,膜通量减少80%并趋向稳定;Cu离子浓度最高为392.64mg/L的水样,过滤55 min后膜通量减少77%并趋向稳定。研究表明,中空纤维膜系统对于电镀废水中的中重金属离子的分离具有良好的应用前景。Copper and nickel are the common metal ions in electroplating wastewater. It has environmental and economic value to separate and recycle copper and nicke. In this study, PTFE hollow fiber membrane filter system was embedded into the cleaning line of electroplating process- and the common nickel and copper ions in electroplating rinsing water were separated. We investigated the main operating conditions of the membrane system at room temperature through the change of membrane flux and interception rate： the optimum operating pressure of the membrane system is 0.7-0.8 MPa; when the pure water flux is 150 L/（m^2·h）, the average retention rate of Ni-containing and Cu-containing samples are 94.02 % and 97.09 %, respectively; the highest concentration of Ni ions was 390.45 mg/L after filtrating for 55 rain, the membrane flux decreased 80 % and tends to be stable; the highest concentration of Ni ions was 392.64 mg/L after filtrating for 55 rain, the membrane flux decreased 77 % and tends to be stable. It is showed that the hollow fiber membrane system would have a good prospect for the separation of heavy metal ions in treatment of electroplating wastewater.

关 键 词：PTFE中空纤维膜 电镀漂洗水 截留率 

分 类 号：TQ[化学工程]