1. Enhanced dechlorination of chlorobenzene by microwave-induced zero-valent iron: particle effects and activation energy.
- Author
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Chien-Li Lee, Hsien-Yi Lee, Kuo-Hung Tseng, Andy Hong, P. K., and Jou, Chih-Ju G.
- Subjects
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CHLORINATION , *CHLOROBENZENE , *IRON , *MICROWAVES , *ORGANIC compounds - Abstract
Organic compounds such as chlorobenzene cannot be effectively decomposed with currently available biological and chemical treatment methods. Preliminary studies show that nano-scale zero-valent iron particles irradiated by microwave is effective in decomposing chemically refractive organic compounds such as chlorobenzene. In this study, microwave is applied to enhance chlorobenzene removal using micron-scale iron particles and nano-scale zero-valent iron particles suspended in the chlorobenzene solution as the dielectric media. The results show that better chlorobenzene removal can be achieved when the chlorobenzene solution is irradiated with 250 W microwave for 150 s than without microwave irradiation. The microwave radiation increases iron reaction rate and surface activity, thus enhancing the chlorobenzene removal. The microwave-induced iron particles cause the chlorobenzene activation energy to drop 34.0% for micron-scale iron and 16.1% for nano-scale zero-valent iron. They can remove 13.6 times more chlorobenzene for micro iron, and 3.6 times more chlorobenzene for nano iron. We have demonstrated that the microwave-induced nano-scale iron particles are effective in treating toxic organic substances as demonstrated in this laboratory study. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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