扩散渗析法从含铬废酸中分离硫酸和Cr(VI)离子  

SEPARATION OF SULFURIC ACID AND Cr(VI) FROM CHROMIUM-CONTAINING WASTE ACID BY DIFFUSION DIALYSIS METHOD

作　　者：马堂文[1] 毕琴 王利超[1] 赵玉明[1] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,江苏南京210023 [2]福州齐倍申环境工程有限公司,福建福州350003

出　　处：《水处理技术》2014年第9期18-21,共4页Technology of Water Treatment

摘　　要：以还原红染料生产过程中产生的含铬废酸为研究对象,采用扩散渗析法分离回收含铬废酸中的Cr(VI)和硫酸。通过实验,确定了合适的膜材料,确定装置运行稳定的时间,得出酸的回收率、Cr(VI)回收率和Cr(III)截留率随酸浓度和流量的变化趋势;优化实验条件时:定制的均相全氟阴离子交换膜在料液(稀释1倍的含铬废酸)与去离子水的体积流量比为1:1、体积流量为50mL/h、室温的工艺条件下,硫酸回收率达到75%,Cr(VI)回收率达到92.8%以上,Cr(III)截留率达到99.8%。Separation of sulfuric acid and Cr （VI） from Chromium-containing waste acid generated in the production process of reduction red dye by diffusion dialysis method was studied. In this study, the suitable membrane material, stability of the device running time, and the changing trend of acid recovery, Cr（VI） recovery rate and Cr（Ⅲ） retention rate at the different conditions of acidity and flow rate were all investigated. The results indicated that the optimum operating volume flow ratio of the solutions （1 times diluted chromium-containing waste acid） and the deionized water was 1：1. Under the optimum experimental conditions of volume flow rate of 50 mL/h at room temperature, the recovery rate of acid and Cr （VI） was 75% and 92.8% respectively, and the retention rate of Cr （Ⅲ） was 99.8%.

关 键 词：含铬废酸 扩散渗析法 回收率 截留率 

分 类 号：TQ028.74[化学工程]