Study on degradation of 1-butyl-3-methylimidazolim tetrafluoroborate by Fe/C micro electrolysis
- Received Date: 06/10/2009
- Accepted Date: 28/08/2009
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Key words:
- ionic liquid /
- Fe/C micro electrolysis /
- [BMIM]BF4 /
- HPLC
Abstract: 1-butyl-3-methylimidazolim tetrafluoroborate ([BMIM]BF4) is one of the most commonly used ionic liquid, which is widely used in fine chemicals and pharmaceuticals synthesis. Fe/C micro electrolysis was selected to treat it in this study because it is toxic to aquatic organisms and difficult to be biodegradated. All the factors which have effect on removal efficiency of [BMIM]BF4 and reaction kinetics were studied symmetrically. The experimental results indicated that the factors arranged in important order for [BMIM]BF4 degradation by Fe/C micro electrolysis are as the follows: the ratio of C/Fe, reaction time and pH. The optimum conditions are iron scarp dosage of 3 g/L, water pH of 2.5,C/Fe ratio of 2,reaction time of 60~90 min. The removal efficiency of [BMIM]BF4 is over 80% under such conditions and [BMIM]BF4 degradation basically accords with the second order kinetics.