Electrochemical inactivation of P. Aeruginosa, A. hydrophila, L. pneumophila using boron doped diamond anodes

Nasr Bensalah, Ahmed Abdel-Wahab

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Pseudomonas Aeruginosa, Aeromonas hydrophila, Legionella pneumophila bacteria are waterborne pathogens commonly found in water and linked to infectious diseases. Especially, they can survive and colonize water systems, particularly in worm water system. On-site supplemental disinfection of water systems might be one of the approaches to prevent water born diseases. In this work, the inactivation of these waterborne pathogens using a single compartment electrochemical flow cell equipped with Boron Doped Diamond (BDD) anode and Titanium cathode was investigated. The bactericidal activity of galvanostatic electrolysis using BDD anode was evaluated on synthetic contaminated waters containing P. Aeruginosa, A. hydrophila, L. pneumophila. BDDanodic oxidation at current density of 50 mA cm-2 achieved total death of waterborne bacteria in treated water samples for bacterial cell density in the range 107 - 108 CFU mL-1. The effects of certain experimental parameters (current density, NaCl concentration, cell density, and flow rate) on kinetics and efficiency of BDD-anodic oxidation during electrochemical disinfection of bacteria suspensions were also examined. The results have indicated that the bactericidal activity of BDD anodes increases with increasing current density and NaCl concentration. This can be explained by the contribution of mediated oxidation with electrogenerated oxidants including hydroxyl radicals, hydrogen peroxide, ozone and free chlorine in the inactivation mechanism of waterborne bacteria at high current densities. This research work has shown that BDD anode is promising tool for inactivation of waterborne pathogens in water and wastewater disinfection.

Original languageEnglish
Pages (from-to)9-15
Number of pages7
JournalJournal of Advanced Oxidation Technologies
Volume16
Issue number1
Publication statusPublished - 1 Jan 2013
Externally publishedYes

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Keywords

  • Bactericidal activity
  • Boron Doped Diamond electrode
  • Electrochemical inactivation
  • Water disinfection
  • Waterborne pathogens

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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