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›› 2009, Vol. 9 ›› Issue (5): 871-876.

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Removal of Vanadium(V) and Chromium(VI) from High Concentration Sodium Phosphate Solution with Ion-exchange Resins

SHEN Ni LIN Xiao CAO Hong-bin GUO Fen WANG Shao-na   

  1. National engineering laboratory for hydrometallurgical cleaner production technology., Institute of Process Engineering, Chinese Academy of Sciences Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemistry Technology Institute of Processing Engineering ，CAS Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2009-03-17 Revised:2009-04-27 Online:2009-10-20 Published:2009-10-20
  • Contact: CAO Hong-bin

离子交换树脂脱除高浓磷酸钠溶液中的钒(V)和铬(VI)

沈妮 林晓 曹宏斌 郭奋 张懿   

  1. 中国科学院过程工程研究所 北京化工大学教育部超重力工程研究中心 中国科学院过程工程研究所 北京化工大学教育部超重力工程研究中心 中国科学院过程工程研究所
  • 通讯作者: 曹宏斌

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Abstract: Removal of vanadium(V) and chromium(VI) from high concentration sodium phosphate solution was studied by ion-exchange technology, focusing on the influential factors of resin characters, adsorption temperature, pH value and ratio of solid to liquid. The results showed that D301R was selected as the optimal resin from five macroporous styrene resins. With D301R resin at the pH of 6.5, room temperature, and ratio of resin to solution of 1:10, the removing effects were favorable. Ten cycles of dynamic experiments showed that removal rates of vanadium(V) and chromium(VI) were 90% and 80% respectively, and the repeatability of resin was stable. The adsorption of vanadium(V) on D301R resin was controlled by replacing process of phosphorus, and the mass transfer rate of vanadium(V) was much lower than that of chromium(VI).

Key words: ion exchange, styrene resin, removal, vanadium(V), chromium(VI), sodium phosphate

摘要： 采用静态吸附实验研究了离子交换法深度脱除高浓度Na3PO4水溶液中微量钒(V)和铬(VI)，考察了树脂性质、吸附温度、吸附pH值和固液比对钒(V)、铬(VI)吸附的影响. 结果表明，在5种大孔苯乙烯系树脂中，D301R最适合脱除高浓磷酸钠溶液中的钒(V)和铬(VI)，料液pH 6.5、室温、树脂/料液比1 g/10 mL时，钒(V)、铬(VI)的去除率较好. 10次动态循环实验结果表明，钒、铬脱除效率均在90%和80%以上，树脂重复使用性能稳定. 钒在D301R树脂上的吸附主要受其与磷的置换过程控制，且其在树脂中的传质速率低于铬.

关键词: 离子交换, 苯乙烯树脂, 脱除, 钒(V), 铬(VI), 磷酸钠

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