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Adsorption isotherm models for dye removal by cationized starch-based material in a single component system: error
Frédéric Gimbert1, Nadia Morin-Crini, François Renault
1University of Franche-Comté, Laboratory of Chrono-Environment, UMR UFC/CNRS 6249, Place Leclerc, 25030 Besançon Cédex, France.
Journal of Hazardous Materials
|February 5, 2008
Summary
Cationized starch effectively adsorbs the anionic dye C.I. Acid Blue 25 (AB 25) from water. The Langmuir model best describes this dye adsorption process, indicating suitability for wastewater treatment applications.
Area of Science:
- Environmental Science
- Materials Science
- Chemical Engineering
Background:
- Anionic dyes like C.I. Acid Blue 25 (AB 25) are common water pollutants.
- Developing efficient adsorbents for dye removal is crucial for environmental protection.
- Starch-based materials offer a sustainable and cost-effective adsorbent platform.
Purpose of the Study:
- To investigate the adsorption of C.I. Acid Blue 25 (AB 25) onto a cationized starch-based adsorbent.
- To evaluate the effect of temperature on dye adsorption capacity.
- To determine the most suitable adsorption isotherm model for describing the experimental data.
Main Methods:
- Adsorption experiments were conducted using an anionic dye and a cationized starch adsorbent.
- Temperature was systematically varied to assess its impact on adsorption.
- Adsorption equilibrium data were fitted to multiple isotherm models (Langmuir, Freundlich, Tempkin, etc.).
- Non-linear regression and error functions were employed for accurate model parameter determination.
Main Results:
- The cationized starch adsorbent demonstrated effective removal of C.I. Acid Blue 25 (AB 25).
- Temperature influenced the adsorption capacity of the dye.
- The Langmuir isotherm model provided the best fit to the experimental adsorption data, outperforming other models.
- Both linear and non-linear regression methods confirmed the superiority of the Langmuir model.
Conclusions:
- Cationized starch is a promising adsorbent for removing anionic dyes from aqueous solutions.
- The Langmuir model accurately describes the adsorption mechanism of C.I. Acid Blue 25 (AB 25) onto this adsorbent.
- The findings support the potential application of this adsorbent in wastewater treatment for dye decolorization.
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