Deionized water, highly contaminated with <i>E. coli </i>was treated using a non-chloride electrolyte solution such as sodium sulfate by pumping it through an electrochemical cell at low current (from 0.2 to 0.4 A) and initial voltage demand of 15-40 volts (close circulating system). The influence of additional water treatment with ultrasound (20 kHz) applied during electrolysis was evaluated together with effect of simultaneous generation of singlet oxygen during irradiation of polymer-based active photolayers containing insoluble in water form of fluorescent dyes. We have determined that hydroxyl radicals are the reactive species responsible for the sanitizing effect of the electrolytic treatment. It was shown that designed photolayers can be successfully used for disinfection of contaminated water through generation of singlet oxygen by their irradiation with visible light of low intensity. We have found the experimental conditions that provide the most effective combinations of singlet oxygen generation and generation of hydroxyl radicals through chlorine-free electrolytic processes and through ultrasonic treatment, superior to each applied individually.

Chlorine-free disinfection of water contaminated with <i>E.coli</i> by combination of electrolysis, ultrasonic and photochemical treatment: Role of hydroxyl radical formation and generation of singlet oxygen

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Chlorine-free disinfection of water contaminated with E.coli by combination of electrolysis, ultrasonic and photochemical treatment: Role of hydroxyl radical formation and generation of singlet oxygen