膜科学与技术

扩散渗析法回收不锈钢酸洗废液中硝酸

作者：王昆¹，王伟²，邢卫红³

单位： 1、南京工业大学膜科学技术研究所，材料化学工程国家重点实验室，

关键词：酸洗废液、扩散渗析、阴离子交换膜

出版年,卷(期):页码： 2010,1(6):0-0

摘要：

摘要：采用扩散渗析法回收不锈钢表面酸洗废液中的硝酸。实验比较了两种扩散渗析膜用于酸回收的分离性能，考察了废酸流量、废酸浓度等对动态扩散渗析回收酸的浓度和金属离子的截留率的影响。实验结果表明： APS型阴离子交换膜的性能略优于DSV 型膜，在合适的条件下，硝酸回收率大于85%，金属离子截留率大于95%。结果表明扩散渗析对于酸和金属盐的分离是一个极其有效的工艺。

Abstract: Recovery of nitric acid from picking solution of steels by diffusion dialysis was studied. Separation performance of two diffusion dialysis membranes for acid recovery was compared. Effects of flow rate and concentration of nitric acid on the concentration and retention rate of the feed by dynamic diffusion dialysis were investigated. The experimental results indicate that performance of the ion exchange membrane type APS was better than the membrane type DSV. Under suitable conditions, the recovery rate of nitric acid is higher than 85% and retention rate of metal ions are higher than 95%. Then it is proved that diffusion dialysis is a very effective operation for the separation of acid and metal salt.

王昆（1984－），男，湖南常德市人，硕士生，研究方向：膜分离，Email：wk1984@yeah.net。通讯联系人：邢卫红，电话025－83172288，Email：xingwh@njut.edu.cn。

参考文献：

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