Treatment of Refinery Waste Water Using Environmental Friendly Adsorbent

  • M Geetha Devi
  • Samira Mohammed Khamis Al-Moshrafi
  • Alaa Al Hudaifi
  • Buthaina Hamood Al Aisari
Original Contribution


This research evaluates the effectiveness of activated carbon prepared from walnut shell in the removal of pollutants from refinery waste water by adsorption technique. A series of batch experiments were carried out by varying the effluent solution pH, stirring time, stirring speed and adsorbent dosage in the reduction of pollutants from refinery effluent. Characterization of the adsorbent was performed using Scanning Electron Microscopy (SEM), Brunauer Emmett and Teller (BET) isotherm and Fourier Transform Infrared (FTIR) Spectroscopy. The best quality activated carbon was obtained with a particle size of 0.75 µm, activation temperature of 800 °C and activation time 24 h. The maximum BET surface area obtained was 165.2653 m2/g. The experimental results demonstrates that the highest percentage reduction in COD was 79%, using 0.6 g walnut shell powder at an optimum stirring speed of 100 rpm, at pH 6 and 120 min of contact time. The outcome of the result shows that walnut shell carbon is a potentially useful adsorbent for the removal of pollutants from refinery waste water.


Adsorption technique Industrial wastewater Turbidity Refinery effluent Walnut shell carbon 

List of symbols


American Society for Testing and Materials




Chemical Oxygen Demand


Fourier Transform Infrared Spectroscopy


Revolutions per Minute


Scanning Electron Microscopy


Total Dissolved Solids


Total Suspended Solids


Dissolved Oxygen


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Copyright information

© The Institution of Engineers (India) 2017

Authors and Affiliations

  • M Geetha Devi
    • 1
  • Samira Mohammed Khamis Al-Moshrafi
    • 1
  • Alaa Al Hudaifi
    • 1
  • Buthaina Hamood Al Aisari
    • 1
  1. 1.Caledonian College of EngineeringSeebOman

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