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Related Experiment Videos

Adsorption study for the removal of a basic dye: experimental and modeling.

Sourja Chakraborty1, Sirshendu De, Sunando DasGupta

  • 1Department of Chemical Engineering, Indian Institute of Technology, Kharagpur 721302, India.

Chemosphere
|January 25, 2005
PubMed
Summary

Sawdust effectively removes crystal violet dye from water. This study details the adsorption process, finding it highly efficient for dye wastewater treatment.

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Area of Science:

  • Environmental Science
  • Materials Science
  • Chemical Engineering

Background:

  • Wastewater contamination from basic dyes like crystal violet poses environmental risks.
  • Developing cost-effective and efficient adsorbents is crucial for dye removal.

Purpose of the Study:

  • To develop an effective adsorbent from sawdust for crystal violet dye removal.
  • To characterize the adsorption behavior and kinetics of the sawdust adsorbent.
  • To model and predict dye removal efficiency under various conditions.

Main Methods:

  • Sawdust was used as an adsorbent for crystal violet dye.
  • Adsorption equilibrium was studied using various isotherms.
  • Kinetic studies investigated the impact of particle size, concentration, temperature, and adsorbent dose.

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  • A two-resistance mass transfer model was employed to analyze kinetic data.

    • Main Results:

    • The sawdust adsorbent demonstrated a high capacity, removing approximately 341 mg of crystal violet per gram at 298 K.
    • Adsorption kinetics were analyzed using a generalized two-resistance mass transfer model.
    • Model parameters (film mass transfer coefficient and internal effective diffusivity) were estimated.
    • The model accurately predicted concentration profiles with an average deviation within 10%.

    Conclusions:

    • Sawdust is a promising, cost-effective adsorbent for crystal violet dye removal.
    • The developed mass transfer model effectively describes the adsorption process.
    • The findings support the use of sawdust in industrial wastewater treatment for dye decolorization.