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Citation: ZHANG Lei, LIU Xue-Yan, KANG Ping-Li. Molybdenum(Ⅵ) and Rhenium(Ⅶ) Separation on Nano-TiO₂[J]. Chinese Journal of Applied Chemistry, ;2009, 26(11): 1362-1366. shu

Molybdenum(Ⅵ) and Rhenium(Ⅶ) Separation on Nano-TiO₂

1.
College of Chemistry, Liaoning University, Shenyang 110036

Corresponding author: ZHANG Lei,
Received Date: 19 November 2008
Available Online: 8 March 2009
Fund Project: 辽宁省教育厅科创新团队项目(2007T053) (2007T053)

A novel sorbent,nano-TiO₂ was employed for the removal of molybdenum and rhenium from aqueous solution in batch equilibrium experiments in order to investigate their adsorption properties.The removal percentage of molybdenum by the sorbent is closed to 99% in a pH range of 1～8.The elution rate of molybdenum with 2 mL of 0.05 mol/L NaOH is closed to 97%.As rhenium is hardly adsorbed onto nano-TiO₂,molybdenum and rhenium can be separated.The adsorption capacities and removal percentage of Mo(Ⅵ) onto nano-TiO₂ were evaluated as a function of the solution concentration and temperature.Results have been analyzed by means of the Langmuir,Freundlich adsorption isotherms.Adsorption isothermal data could be well interpreted by the Langmuir model.Saturated adsorption capacity increases from 11.51mg/g to 14.19 mg/g in a temperature range of 275～323 K.The removal percentage of Re(Ⅶ) by the actived carbon is closed to 99% in a pH range of 1～10.The results showed that the elution rate of Re(Ⅶ) with strong ammonia is 96%.Adsorption isothermal data could be well interpreted by the Freundlich model.The kinetic experimental data of Re(Ⅶ) are properly correlated with the second-order kinetic model.
- Mo(Ⅵ),
- Re(Ⅶ),
- nano-TiO₂,
- actived carbon,
- adsorption,
- elution
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Molybdenum(Ⅵ) and Rhenium(Ⅶ) Separation on Nano-TiO2

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Molybdenum(Ⅵ) and Rhenium(Ⅶ) Separation on Nano-TiO₂