Water Defluoridation by Lignite
Lignite (raw or alum-treated) was found to possess about one-half the fluoride sorption capacity of commercial grade activated alumina. No significant difference in performance of raw and alum-treated lignite in five cycles of defluoridation column test at pH 5.0 ± 0.2, using hydrochloric acid as re...
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| Main Authors: | , |
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| Format: | Article |
| Published: |
Technoscience Publications
2007
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| Subjects: | |
| Online Access: | http://eprints.utp.edu.my/2290/1/Water_Defluoridation_by_Lignite.pdf http://eprints.utp.edu.my/2290/ |
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| Summary: | Lignite (raw or alum-treated) was found to possess about one-half the fluoride sorption capacity of commercial grade activated alumina. No significant difference in performance of raw and alum-treated lignite in five cycles of defluoridation column test at pH 5.0 ± 0.2, using hydrochloric acid as regenerant, was observed. Infrared spectra indicated interaction of fluoride with carbonyl and aromatic ring functional groups in lignite. The results call for long-duration column tests, employing fluoride-bearing groundwater of varied characteristics and at natural pH, to confirm suitability of lignite as a
low-cost medium for home water defluoridation in rural areas of developing countries. |
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