摘要
对732强酸性阳离子交换树脂再生铬酸盐钝化液进行了探索。研究了交换处理时间、溶液初始pH、Zn（II）初始浓度及树脂用量对树脂吸附的影响，并考察了树脂的脱附和再生性能。结果表明，该树脂对Zn（II）的吸附速率快，30min达到吸附平衡，最佳吸附pH为3～6。用树脂再生钝化液不会对Cr（VI）浓度产生影响，能达到“去锌保铬”的目的。该树脂对Zn（II）的吸附符合Langmuir吸附等温模型，为单分子层吸附，具有吸附饱和性，饱和吸附量约为85．6mg／g。
The removal of Zn（II） from chromate passivation solution was studied using 732-type strong acid cation exchange resin. The effects of some process parameters such as contact time, initial pH of solution, initial concentration of Zn（II）, and resin dosage on the adsorption, as well as the desorption and regeneration performances of the resin were examined. The results showed that the adsorption of Zn（II） by 732 cation exchange resin is fast to reach the equilibrium in 30 min and the best pH ranges from 3 to 6. The concentration of Cr（VI） in chromate passivation is not affected by using 732 cation exchange resin while Zn（II） is adsorbed. The adsorption behavior of 732 cation exchange resin for Zn（II） obeys the Langmuir isotherm, which is a monomolecular layer model with adsorption saturation about 85.6 mg/g.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2014年第16期694-697,共4页
Electroplating & Finishing
关键词
强酸性阳离子交换树脂
铬酸盐钝化液
锌离子
吸附
再生
strong acid cation exchange resin
chromate passivation solution
zinc ion
adsorption
regeneration
