The reaction mechanism of solar photo-Fenton mediated by ferric iminodisuccinate (Fe3+-IDS) for simultaneous wastewater disinfection and microcontaminant removal has been assessed. The influence of temperature and photon absorption on acetamiprid (ACTM, 100 µg/L) removal and Escherichia coli K-12 (E. coli, 105 CFU/100 mL) inactivation was investigated in a synthetic secondary effluent with 0.1 mM Fe3+-IDS and 1.47 mM H2O2. Based on the phenomenological study, a mechanistic model involving microcontaminant removal and the synergistic contribution of sunlight/H2O2 and hydroxyl radicals to bacterial inactivation was proposed and validated in a 19-L raceway pond reactor. Model performance was successfully assessed in actual wastewater, meeting the most restrictive monitoring requirements for disinfection (10 CFU E. coli/100 mL) along with 54 % microcontaminant removal. The modeling strategy can be adapted to other microorganisms and microcontaminants, resulting in a useful designing tool for wastewater reclamation at large scale.
Delving into the kinetics of solar photo-Fenton with Fe3+-IDS coupling bacterial inactivation and microcontaminant removal
De Carluccio, M.;Rizzo, L.;
2025-01-01
Abstract
The reaction mechanism of solar photo-Fenton mediated by ferric iminodisuccinate (Fe3+-IDS) for simultaneous wastewater disinfection and microcontaminant removal has been assessed. The influence of temperature and photon absorption on acetamiprid (ACTM, 100 µg/L) removal and Escherichia coli K-12 (E. coli, 105 CFU/100 mL) inactivation was investigated in a synthetic secondary effluent with 0.1 mM Fe3+-IDS and 1.47 mM H2O2. Based on the phenomenological study, a mechanistic model involving microcontaminant removal and the synergistic contribution of sunlight/H2O2 and hydroxyl radicals to bacterial inactivation was proposed and validated in a 19-L raceway pond reactor. Model performance was successfully assessed in actual wastewater, meeting the most restrictive monitoring requirements for disinfection (10 CFU E. coli/100 mL) along with 54 % microcontaminant removal. The modeling strategy can be adapted to other microorganisms and microcontaminants, resulting in a useful designing tool for wastewater reclamation at large scale.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
