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Removal of Reactofix Navy Blue 2 GFN from aqueous solutions using adsorption techniques
Vinod Kumar Gupta1, Rajeev Jain, Shaily Varshney
1Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India. vinodfcy@iitr.ernet.in
Journal of Colloid and Interface Science
|January 2, 2007
Summary
Wheat husk, an agricultural waste, effectively adsorbs Reactofix Navy Blue 2 GFN dye from water. This study explores its potential as a low-cost adsorbent for wastewater treatment, showing promising results for color and COD removal.
Area of Science:
- Environmental Chemistry
- Materials Science
- Adsorption Science
Background:
- Industrial wastewater often contains persistent synthetic dyes like Reactofix Navy Blue 2 GFN.
- Agricultural by-products offer a sustainable and cost-effective source for adsorbent materials.
Purpose of the Study:
- To investigate the efficacy of activated wheat husk as an adsorbent for removing Reactofix Navy Blue 2 GFN dye from aqueous solutions.
- To compare the adsorption performance of wheat husk with charcoal.
- To evaluate the thermodynamic parameters of the adsorption process.
Main Methods:
- Batch adsorption studies were conducted to determine optimal conditions.
- Solution pH, adsorbent dosage, initial dye concentration, and contact time were varied.
- Freundlich and Langmuir isotherm models were applied to equilibrium data.
- Thermodynamic parameters (free energy, enthalpy, entropy) were calculated.
Main Results:
- Wheat husk demonstrated significant adsorption capacity for Reactofix Navy Blue 2 GFN.
- Adsorption equilibrium was influenced by pH, adsorbent dose, dye concentration, and contact time.
- Freundlich and Langmuir isotherms successfully described the adsorption behavior.
- Thermodynamic analysis indicated the spontaneity and endothermic nature of the adsorption.
Conclusions:
- Activated wheat husk is a viable and economical adsorbent for removing Reactofix Navy Blue 2 GFN dye from wastewater.
- The adsorption process is effective in reducing color and chemical oxygen demand (COD).
- Wheat husk presents a sustainable alternative to conventional adsorbents for dye removal.
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