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The isothermal adsorption of dyes on a variety of sisal based activated carbonfibers (SACFs), and the influence of PH and temperature on absorption are discussedin this paper The results indicate that the adsorption of methylene blue, crystal violetand Eriochrome blue black R on SACFs shows type I isotherms and can be describedby the Langnuir equation or the Freudlich equation. The acidity of solution hasgreatly ifluence over the adeorption amounts of methylene blue, crystal violet andEriochrome blue black R. As PHs of the solutions were adjusted to increase ordecrease from the original acidity of the solution (4. 7. 4. ) and 4. 0 for methylene blue,crystal violet and Eriochrome blue black R. respectively), the amounts of dyesadsorbed on SACFs increased. The adsorption temperature (in the range of 25~50℃)exerts little influence on the adsorption amount of methylene blue, crystal violet andfluorescein. For azo dyes (Eriochrome blue black R and Eriochrome black T), howeverthe absorption amount increases slightly with the elevation of temperature.
The isothermal adsorption of dyes on a variety of sisal based activated carbon filters (SACFs), and the influence of PH and temperature on absorption are discussed in this paper The results indicate that the adsorption of methylene blue, crystal violetand Eriochrome blue black R on SACFs shown type I isotherms and can be described by the Langnuir equation or the Freudlich equation. The acidity of solution has great aeration over the adeorption amounts of methylene blue, crystal violet andEriochrome blue black R. As PHs of the solutions were adjusted to increase ordecrease from the original acidity of the solution of (4. 7 4.) and 4.0 for methylene blue, crystal violet and Eriochrome blue black R. respectively), the amounts of dyesadsorbed on SACFs increased. The adsorption temperature (in the range of 25-50 ° C.) exerts little influence on the amount of methylene blue, crystal violet and fluorescein. For azo dyes (Eriochrome blue black R and Eriochrome black T), howeverthe absorptio n amount increases slightly with the elevation of temperature.