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Removal of iron from drinking water by electrocoagulation: Adsorption and kinetics studies

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Abstract

The present study provides an electrocoagulation process for the removal of iron from drinking water with aluminum alloy as the anode and stainless steel as the cathode. The studies were carried out as a function of pH, temperature and current density. The adsorption capacity was evaluated with both the Langmuir and the Freundlich isotherm models. The results showed that the maximum removal efficiency of 98.8% was achieved at a current density of 0.06 A dm−2, at a pH of 6.5. The adsorption of iron preferably fitting the Langmuir adsorption isotherm suggests monolayer coverage of adsorbed molecules. The adsorption process follows second-order kinetics. Temperature studies showed that adsorption was endothermic and spontaneous in nature.

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Authors and Affiliations

  1. Central Electrochemical Research Institute (CSIR), Karaikudi, 630 006, India

    Subramanyan Vasudevan, Jeganathan Jayaraj, Jothinathan Lakshmi & Ganapathy Sozhan

Authors
  1. Subramanyan Vasudevan
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  2. Jeganathan Jayaraj
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  3. Jothinathan Lakshmi
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  4. Ganapathy Sozhan
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Correspondence to Subramanyan Vasudevan.

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Vasudevan, S., Jayaraj, J., Lakshmi, J. et al. Removal of iron from drinking water by electrocoagulation: Adsorption and kinetics studies. Korean J. Chem. Eng. 26, 1058–1064 (2009). https://doi.org/10.1007/s11814-009-0176-9

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  • DOI: https://doi.org/10.1007/s11814-009-0176-9

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