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Color removal from paper mill effluent through adsorption technology.

C K Jain1, Arvind Kumar, M Hayssam Izazy

  • 1National Institute of Hydrology, Roorkee 247667, India. ckj_1959@yahoo.co.in

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|February 9, 2008
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Summary

Bagasse fly ash effectively removes color from wastewater, achieving 86% removal. This inexpensive adsorbent is optimal after 60 minutes with a 2 g/L dose, following established adsorption models.

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Area of Science:

  • Environmental Science
  • Materials Science
  • Chemical Engineering

Background:

  • Pulp and paper industry wastewater often contains significant color contaminants.
  • Effective and economical decolorization methods are crucial for environmental compliance.
  • Bagasse fly ash, a byproduct of the sugar industry, presents a potential low-cost adsorbent material.

Purpose of the Study:

  • To evaluate the efficacy of bagasse fly ash as an adsorbent for removing color from industrial wastewater.
  • To investigate the influence of key operating parameters on the decolorization process.
  • To determine the adsorption capacity and model applicability of bagasse fly ash.

Main Methods:

  • Adsorption experiments were conducted using bagasse fly ash to remove color from simulated industrial effluent.
  • Key variables studied included contact time, initial color concentration, adsorbent dosage, and particle size.
  • Adsorption isotherms were analyzed using Langmuir and Freundlich models.

Main Results:

  • Optimal color removal was achieved at a contact time of 60 minutes and an adsorbent dosage of 2 g/L.
  • Bagasse fly ash demonstrated a high color removal capacity, reaching up to 86%.
  • The adsorption process followed both Langmuir and Freundlich adsorption isotherms, indicating favorable interaction mechanisms.

Conclusions:

  • Bagasse fly ash is a cost-effective and efficient adsorbent for decolorizing pulp and paper industry wastewater.
  • The study provides optimal operating conditions for utilizing bagasse fly ash in wastewater treatment.
  • The findings support the use of agricultural waste-derived materials for sustainable environmental remediation.