电去离子技术同步纯化和浓缩含镍离子溶液的研究  

Study on synchronous purification and concentration of dilute solution containing nickel ion by electrodeionization

作　　者：任安娟[1] 王建友[1] 卢会霞[1] 苏玉龙[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300072

出　　处：《现代化工》2009年第6期55-58,60,共5页Modern Chemical Industry

基　　金：国家高技术研究发展计划(863计划)项目(2007AA06Z330);天津市科技支撑计划重点项目(08ZCKFSH01800);高等学校博士学科点专项科研基金新教师项目(20070055081)

摘　　要：采用自制微型电去离子膜堆装置,以模拟电镀镍漂洗水为处理对象,基于特征曲线考察确定了工作膜堆电压,并重点研究了淡水室中的树脂比例对过程分离性能的影响。结果表明,阴阳树脂比存在最优值,任一树脂所占比例过高,均会导致膜堆内部结垢,而阴树脂过量时尤为明显。对于含Ni2+质量浓度52 mg/L、pH=3的NiSO4溶液,在优选的膜堆电压下,所用阴阳树脂(体积)比为4∶6时,淡化出水和浓缩水的Ni2+质量浓度分别达到0.28 mg/L和3 407 mg/L,浓差大于12 000倍,且过程具有良好的稳定性。The experimental system of electrodeionization with partially circulating of concentrate stream is designed for purifying and concentrating dilute solution containing nickel ion synchronously. The influences of the ratio of resins and the operational parameters on separation performance are investigated. And the results show that under optimized voltage and resin ratio and with 52.5 mg/L of Ni^2＋ feed concentration and 3.0 of pH value, the Ni^2＋concentration in dilute product can drop to 0.28 mg/L while that of the concentrated product reaches 3 407 mg/L, which means the concentration difference can be as many as 12 000 times. The process also has a good stability.

关 键 词：电去离子 离子交换树脂 镍离子 水解离 

分 类 号：TQ028.3[化学工程]