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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/189593
Improving ferrate disinfection and decontamination performance at neutral pH by activating peroxymonosulfate under solar light
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In this work, the effect of solar light as a 'reducing agent' in Fe(VI)/PMS process for disinfection and decontamination of water was investigated. Single, double and triple-factor disinfection processes were systematically studied against Escherichia coli and validated on sulfamethoxazole. The experiments performed with PMS or Fe(VI) in dark conditions only achieved 1-log reduction in 2 h, while no significant enhancement was found in the Fe(VI)/PMS system. The introduction of solar light in either PMS or Fe(VI) process enhanced the E. coli inactivation since complete inactivation (6-log) was reached at 90 min. However, the best improvement was done with the triple-factor disinfection process (Fe(VI)/PMS/solar light) which presented 6-log reduction at only 40 min. In the case of sulfamethoxazole, more than 70% removal was achieved under the Fe(VI)/PMS/solar light system, while only about 20% was observed with single and double-factor processes. Our study revealed the light spectrum distribution effects, the iron implications, while a main role for 〖HO〗^¿ and the participation of 〖SO〗_4^(¿-) was found, without overlooking the direct effects of solar light and PMS itself, as well as the possible involvement of other transient species. Overall, the efficacy of the Fe(VI)/PMS/solar light process against a series of microorganisms combined with the effectiveness at near-neutral pH, suggest its suitability for further assessment in disinfection and/or decontamination of water.
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LÓPEZ VINENT, Núria, CRUZ ALCALDE, Alberto, MOUSSAVI, Gholamreza, DEL CASTILLO GONZALEZ, Isabel, HERNANDEZ LEHMANN, Aurelio, GIMÉNEZ FARRERAS, Jaume, GIANNAKIS, Stefanos. Improving ferrate disinfection and decontamination performance at neutral pH by activating peroxymonosulfate under solar light. _Chemical Engineering Journal_. 2022. Vol. 450, núm. 137904. [consulta: 25 de febrer de 2026]. ISSN: 1385-8947. [Disponible a: https://hdl.handle.net/2445/189593]