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The efficiency of the electrocoagulation process in reducing fluoride: application of inductive alternating current and polarity inverter

  • M. Alimohammadi
  • A. Mesdaghinia
  • M. H. Shayesteh
  • H. J. MansoorianEmail author
  • N. Khanjani
Original Paper
  • 24 Downloads

Abstract

In this study, using hybrid Al and Fe plate electrodes in an electrochemical cell by using inductive alternating current and polarity inverter as an alternative method for decreasing fluoride in drinking water sequentially, by the electrocoagulation process has been evaluated. The effect of operational parameters such as the type of current, paired hybrid electrodes and polarity inverter, pH, current density, electrolysis time, charge loading and flow rate on the percent of fluoride removal along with the amount of energy and electrode consumed and amount of sludge produced was evaluated. In the following optimum operation conditions: paired hybrid Al–Fe electrodes with polarity inverter, pH = 6, current density = 12 mA/cm2, electrolysis time = 40 min, charge loading 0.609 Faradays/m3 and flow rate 75 ml/min, the efficiency of fluoride removal, energy and electrode consumption, flow efficiency, amount of sludge produced and sedimentation capacity were, respectively, 95% (from initial 4.93 to 0.24 mg/l), 0.9 kWh/m3, 1.42 kg/m3, 110%, 0.108 kg/m3 and 0.073 l/g. The results showed that the electrocoagulation process by using alternating current and polarity inverter is a very efficient method for removing fluoride from drinking water.

Keywords

Electrochemical treatment Hybrid plate electrodes Electrode connection model Alternating current Polarity inverter Fluoride removal 

Notes

Acknowledgements

The authors wish to thank the School of Public Health of Tehran University of Medical Sciences which approved this project.

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Copyright information

© Islamic Azad University (IAU) 2019

Authors and Affiliations

  • M. Alimohammadi
    • 1
    • 2
    • 3
  • A. Mesdaghinia
    • 1
    • 2
  • M. H. Shayesteh
    • 4
  • H. J. Mansoorian
    • 1
    Email author
  • N. Khanjani
    • 5
  1. 1.Department of Environmental Health Engineering, School of Public HealthTehran University of Medical SciencesTehranIran
  2. 2.Center for Water Quality Research (CWQR)Institute for Environmental Research (IER), Tehran University of Medical SciencesTehranIran
  3. 3.Health Equity Research Center (HERC)Tehran University of Medical SciencesTehranIran
  4. 4.Department of Toxicology and Pharmacology, Faculty of PharmacyTehran University of Medical SciencesTehranIran
  5. 5.Environmental Health Engineering Research CenterKerman University of Medical SciencesKermanIran

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