Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
582155 | Journal of Hazardous Materials | 2009 | 7 Pages |
Abstract
The potentiality of polyaniline and poly (m-methyl aniline) to remove fluoride from water via doping was investigated. The influence of pH, dosage of polyanilines, initial fluoride concentration and temperature on the amount of fluoride removed by the polyanilines were studied. The amount of fluoride removed at pH 7.0 by 50Â mg/50Â ml dose was found to be 0.78Â mg/g. The data of fluoride removal fitted well with Langmuir and Freundlich isotherms. Thermodynamic parameters computed show that the adsorption process is endothermic in nature. FT-IR, X-ray and EDAX patterns of the polyanilines before and after exposure to fluoride ions suggest that the defluoridation occurs via doping of fluoride ions onto these polymers.
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Authors
M. Karthikeyan, K.K. Satheeshkumar, K.P. Elango,