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Escherichia coli inactivation in water by sulfate radical-based oxidation process using FeCl3-activated biochar/persulfate system by Shengquan Zeng; Eunsung Kan is a Environmental Science article available to read on EtoBox.

What is Escherichia coli inactivation in water by sulfate radical-based oxidation process using FeCl3-activated biochar/persulfate system about?

Pathogenic microbes in water present great risks to environments, water resources, and human health. In the present study, for the first time, a FeCl3-activated bermudagrass-derived biochar (FA-BC) was applied to activate persulfate (PS) for E. coli inactivation. The PS activation was ascribed to the presence of Fe0 and Fe3O4 on the surface of FA-BC, and SO4 ·− radicals were proved to be the main role for E. coli inactivation using FA-BC activated PS system (FA-BC/PS). Decreasing the pH (5–9) and increasing the PS concentration (50–300 mg/L), reaction temperature (20–50 °C), and FA-BC dosage (100–500 mg/L) resulted in the enhancement of disinfection efficiency of E. coli using FA-BC/PS. 6.21 log reductions of E. coli were achieved within 20 min under the optimal conditions (500 mg/L FA-BC, 200 mg/L PS, pH 7, and 20 °C with 107 CFU/mL E. coli in DI water). The FA-BC/PS effectively eliminated various initial concentrations of E. coli (105–108 CFU/mL). The E. coli inactivation rate decreased from 0.1426 min−1 to 0.0883, 0.1268 min−1, and 0.1093 min−1 with the presence of 10 mg/L humic acid, 100 mg/L Cl−, and 100 mg/L HCO3 −, respectively. In addition, after three cycles of disinfectio

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Author

Shengquan Zeng; Eunsung Kan

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)