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Adsorption of a model anionic dye, eosin Y, from aqueous solution by chitosan hydrobeads
Sudipta Chatterjee1, Sandipan Chatterjee, Bishnu P Chatterjee
1Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
Journal of Colloid and Interface Science
|June 2, 2005
Summary
Conditioned chitosan hydrobeads effectively remove eosin Y dye from wastewater. These reusable beads offer an eco-friendly and efficient solution for textile effluent remediation, adsorbing significant dye amounts.
Area of Science:
- Environmental Science
- Materials Science
- Chemical Engineering
Background:
- Textile dye effluents pose environmental challenges.
- Sorption is a promising remediation technique.
- Chitosan hydrobeads offer a sustainable adsorbent material.
Purpose of the Study:
- To investigate the adsorption of eosin Y dye using conditioned chitosan hydrobeads.
- To understand the physicochemical characteristics of the adsorption process.
- To evaluate the reusability and efficiency of the adsorbent.
Main Methods:
- Adsorption experiments using conditioned chitosan hydrobeads and eosin Y dye.
- Analysis of adsorption kinetics and isotherm behavior.
- Investigation of temperature effects on sorption capacity.
- Dye desorption studies via pH modification.
Main Results:
- Conditioned chitosan hydrobeads demonstrated reduced pH sensitivity, maintaining high sorption capacity near pH 8.
- The Langmuir model accurately described the adsorption process.
- Adsorption kinetics followed a second-order equation.
- One gram of chitosan adsorbed approximately 76 mg of eosin Y.
- The adsorbent material was successfully reused five times without efficacy loss.
Conclusions:
- Conditioned chitosan hydrobeads are effective for eosin Y dye removal from wastewater.
- The adsorption process is well-described by Langmuir isotherm and second-order kinetics.
- Chitosan hydrobeads offer a reusable and ecofriendly option for textile effluent treatment.