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<p>The aim of the present study was to evaluate the efficacy of peroxydisulfate(PDS)/peroxymonosulfate(PMS) activated using different methods for inactivating <i>E.coli</i> and <i>P.aeruginosa</i>. The UV-A, UV-A/PDS, PMS, and NaOH/PDS processes were used to inactivate <i>E.coli</i> and <i>P.aeruginosa</i>. Three different sulfate salts (K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>, Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub> and Oxone) were activated with UV-A radiation, and their inactivation effects were determined. During 30&#xa0;min of UV A (Ultraviolet-A) radiation, the addition of 3&#xa0;mM K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>, Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub>, and Oxone increased the removal efficiency of <i>E. coli</i> by 1.76, 1.51, and 2.47 log, respectively. For <i>P. aeruginosa</i>, there were increases of 1.44, 1.62, and 2.55 logs, respectively. The highest removal efficiency was obtained with oxone + UV-A for <i>E.coli</i> and <i>P.aeruginosa</i>. To examine the inactivation effect of alkaline (NaOH)-activated peroxydisulfate on microorganisms, studies were carried out using two different doses of K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> (2 and 3 mM). With an increase in the PDS concentration, the removal efficiency of both bacteria increased. Higher removal efficiencies were obtained at higher base/PDS ratios. When the PDS concentration was increased from 2 to 3&#xa0;mM at the same NaOH/PDS (0.25) ratio, the time required for 4 log bacteria removal was reduced by 33% for <i>E.coli</i>, while there was a decrease of more than 44.2% for <i>P.aeruginosa</i>.</p>

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Inactivation of E. coli and P. aeruginosa by UV-A-Activated PMS and PDS, and Alkaline-Activated PDS: A Comparative Study

  • 期刊论文

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  • 发表日期：

    2026年8月1日

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  • Sevil Çalışkan Eleren,
  • Ebru Yavaş

摘要

The aim of the present study was to evaluate the efficacy of peroxydisulfate(PDS)/peroxymonosulfate(PMS) activated using different methods for inactivating E.coli and P.aeruginosa. The UV-A, UV-A/PDS, PMS, and NaOH/PDS processes were used to inactivate E.coli and P.aeruginosa. Three different sulfate salts (K2S2O8, Na2S2O8 and Oxone) were activated with UV-A radiation, and their inactivation effects were determined. During 30 min of UV A (Ultraviolet-A) radiation, the addition of 3 mM K2S2O8, Na2S2O8, and Oxone increased the removal efficiency of E. coli by 1.76, 1.51, and 2.47 log, respectively. For P. aeruginosa, there were increases of 1.44, 1.62, and 2.55 logs, respectively. The highest removal efficiency was obtained with oxone + UV-A for E.coli and P.aeruginosa. To examine the inactivation effect of alkaline (NaOH)-activated peroxydisulfate on microorganisms, studies were carried out using two different doses of K2S2O8 (2 and 3 mM). With an increase in the PDS concentration, the removal efficiency of both bacteria increased. Higher removal efficiencies were obtained at higher base/PDS ratios. When the PDS concentration was increased from 2 to 3 mM at the same NaOH/PDS (0.25) ratio, the time required for 4 log bacteria removal was reduced by 33% for E.coli, while there was a decrease of more than 44.2% for P.aeruginosa.