Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species
E. Ortega-Gómez, M.M. Ballesteros Martín, B. Esteban García, J.A. Sánchez Pérez, Pilar Fernandez-Ibanez
The competitive effect for the oxidative species produced during solar photo-Fenton process at neutralpH between an organic compound (resorcinol) and a model microorganism (Enterococcus faecalis) wasinvestigated. With this purpose, the inactivation of E. faecalis was evaluated under several solar processes,i.e. SODIS, solar-UVA with H2O2 (10, 20 and 50 mg L−1) and solar-UVA-Fe2+ (2.5, 5 and 20 mg L−1)in the absence and presence of resorcinol (10 mg L−1). The effect of resorcinol on the Fenton reaction(H2O2/Fe2+ in the dark: 5/2.5 and 50/20 mg L−1) efficacy at neutral pH was also evaluated. In spite ofresorcinol maintained a high amount of iron (around 10 mg L−1) in solution during the experiments, withthe highest concentrations of H2O2/Fe2+ (50/20 mg L−1), only a 2-log decrease of bacteria was observedwith 10 mg L−1 of resorcinol, while a 3.5-log abatement was detected without resorcinol. These resultshighlight the competitive role of organic matter for the oxidant species against bacteria when photooxidationand photo-disinfection processes are occurring at the same time. This competition for theoxidant species, mainly hydroxyl radicals generated during photo-Fenton, was confirmed by (i) thesolar photo-Fenton assays at three different concentrations (H2O2/Fe2+): 5/2.5, 10/5 and 20/10 mg L−1,although at elevated concentrations of H2O2 and Fe2+ (50/20 mg L−1) the disinfection efficiency wasindependent of the addition of resorcinol because an excess of radicals were generated, and (ii) bythe photo-Fenton results obtained when the concentration of resorcinol was increased from 20, 30 till40 mg L−1.
Applied Catalysis B: Environmental
https://doi.org/10.1016/j.apcatb.2013.09.051
E-pub ahead of print - 9 Oct 2013
Solar photo-Fenton
Hydroxyl radicals
10.1016/j.apcatb.2013.09.051
Dive into the research topics of 'Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species'. Together they form a unique fingerprint.
Disinfection Engineering & Materials Science 100%
Biological materials Engineering & Materials Science 90%
Bacteria Engineering & Materials Science 77%
Resorcinol Chemistry 77%
Organic Matter Chemistry 73%
disinfection Earth & Environmental Sciences 67%
Organic compounds Engineering & Materials Science 48%
organic matter Earth & Environmental Sciences 46%
Ortega-Gómez, E., Ballesteros Martín, M. M., Esteban García, B., Sánchez Pérez, J. A., & Fernandez-Ibanez, P. (2013). Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species. Applied Catalysis B: Environmental, 148-14, 484-489. https://doi.org/10.1016/j.apcatb.2013.09.051
Ortega-Gómez, E. ; Ballesteros Martín, M.M. ; Esteban García, B. ; Sánchez Pérez, J.A. ; Fernandez-Ibanez, Pilar. / Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species. In: Applied Catalysis B: Environmental. 2013 ; Vol. 148-14. pp. 484-489.
@article{97de9d12e5094df190501092b5561ac3,
title = "Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species",
abstract = "The competitive effect for the oxidative species produced during solar photo-Fenton process at neutralpH between an organic compound (resorcinol) and a model microorganism (Enterococcus faecalis) wasinvestigated. With this purpose, the inactivation of E. faecalis was evaluated under several solar processes,i.e. SODIS, solar-UVA with H2O2 (10, 20 and 50 mg L−1) and solar-UVA-Fe2+ (2.5, 5 and 20 mg L−1)in the absence and presence of resorcinol (10 mg L−1). The effect of resorcinol on the Fenton reaction(H2O2/Fe2+ in the dark: 5/2.5 and 50/20 mg L−1) efficacy at neutral pH was also evaluated. In spite ofresorcinol maintained a high amount of iron (around 10 mg L−1) in solution during the experiments, withthe highest concentrations of H2O2/Fe2+ (50/20 mg L−1), only a 2-log decrease of bacteria was observedwith 10 mg L−1 of resorcinol, while a 3.5-log abatement was detected without resorcinol. These resultshighlight the competitive role of organic matter for the oxidant species against bacteria when photooxidationand photo-disinfection processes are occurring at the same time. This competition for theoxidant species, mainly hydroxyl radicals generated during photo-Fenton, was confirmed by (i) thesolar photo-Fenton assays at three different concentrations (H2O2/Fe2+): 5/2.5, 10/5 and 20/10 mg L−1,although at elevated concentrations of H2O2 and Fe2+ (50/20 mg L−1) the disinfection efficiency wasindependent of the addition of resorcinol because an excess of radicals were generated, and (ii) bythe photo-Fenton results obtained when the concentration of resorcinol was increased from 20, 30 till40 mg L−1.",
keywords = "Enterococcus faecalis, Solar photo-Fenton, Disinfection, Resorcinol, Hydroxyl radicals",
author = "E. Ortega-G{\'o}mez and {Ballesteros Mart{\'i}n}, M.M. and {Esteban Garc{\'i}a}, B. and {S{\'a}nchez P{\'e}rez}, J.A. and Pilar Fernandez-Ibanez",
doi = "10.1016/j.apcatb.2013.09.051",
volume = "148-14",
journal = "Applied Catalysis B: Environmental",
Ortega-Gómez, E, Ballesteros Martín, MM, Esteban García, B, Sánchez Pérez, JA & Fernandez-Ibanez, P 2013, 'Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species', Applied Catalysis B: Environmental, vol. 148-14, pp. 484-489. https://doi.org/10.1016/j.apcatb.2013.09.051
Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species. / Ortega-Gómez, E.; Ballesteros Martín, M.M.; Esteban García, B.; Sánchez Pérez, J.A.; Fernandez-Ibanez, Pilar.
In: Applied Catalysis B: Environmental, Vol. 148-14, 09.10.2013, p. 484-489.
T1 - Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species
AU - Ortega-Gómez, E.
AU - Ballesteros Martín, M.M.
AU - Esteban García, B.
AU - Sánchez Pérez, J.A.
AU - Fernandez-Ibanez, Pilar
N2 - The competitive effect for the oxidative species produced during solar photo-Fenton process at neutralpH between an organic compound (resorcinol) and a model microorganism (Enterococcus faecalis) wasinvestigated. With this purpose, the inactivation of E. faecalis was evaluated under several solar processes,i.e. SODIS, solar-UVA with H2O2 (10, 20 and 50 mg L−1) and solar-UVA-Fe2+ (2.5, 5 and 20 mg L−1)in the absence and presence of resorcinol (10 mg L−1). The effect of resorcinol on the Fenton reaction(H2O2/Fe2+ in the dark: 5/2.5 and 50/20 mg L−1) efficacy at neutral pH was also evaluated. In spite ofresorcinol maintained a high amount of iron (around 10 mg L−1) in solution during the experiments, withthe highest concentrations of H2O2/Fe2+ (50/20 mg L−1), only a 2-log decrease of bacteria was observedwith 10 mg L−1 of resorcinol, while a 3.5-log abatement was detected without resorcinol. These resultshighlight the competitive role of organic matter for the oxidant species against bacteria when photooxidationand photo-disinfection processes are occurring at the same time. This competition for theoxidant species, mainly hydroxyl radicals generated during photo-Fenton, was confirmed by (i) thesolar photo-Fenton assays at three different concentrations (H2O2/Fe2+): 5/2.5, 10/5 and 20/10 mg L−1,although at elevated concentrations of H2O2 and Fe2+ (50/20 mg L−1) the disinfection efficiency wasindependent of the addition of resorcinol because an excess of radicals were generated, and (ii) bythe photo-Fenton results obtained when the concentration of resorcinol was increased from 20, 30 till40 mg L−1.
AB - The competitive effect for the oxidative species produced during solar photo-Fenton process at neutralpH between an organic compound (resorcinol) and a model microorganism (Enterococcus faecalis) wasinvestigated. With this purpose, the inactivation of E. faecalis was evaluated under several solar processes,i.e. SODIS, solar-UVA with H2O2 (10, 20 and 50 mg L−1) and solar-UVA-Fe2+ (2.5, 5 and 20 mg L−1)in the absence and presence of resorcinol (10 mg L−1). The effect of resorcinol on the Fenton reaction(H2O2/Fe2+ in the dark: 5/2.5 and 50/20 mg L−1) efficacy at neutral pH was also evaluated. In spite ofresorcinol maintained a high amount of iron (around 10 mg L−1) in solution during the experiments, withthe highest concentrations of H2O2/Fe2+ (50/20 mg L−1), only a 2-log decrease of bacteria was observedwith 10 mg L−1 of resorcinol, while a 3.5-log abatement was detected without resorcinol. These resultshighlight the competitive role of organic matter for the oxidant species against bacteria when photooxidationand photo-disinfection processes are occurring at the same time. This competition for theoxidant species, mainly hydroxyl radicals generated during photo-Fenton, was confirmed by (i) thesolar photo-Fenton assays at three different concentrations (H2O2/Fe2+): 5/2.5, 10/5 and 20/10 mg L−1,although at elevated concentrations of H2O2 and Fe2+ (50/20 mg L−1) the disinfection efficiency wasindependent of the addition of resorcinol because an excess of radicals were generated, and (ii) bythe photo-Fenton results obtained when the concentration of resorcinol was increased from 20, 30 till40 mg L−1.
KW - Enterococcus faecalis
KW - Solar photo-Fenton
KW - Disinfection
KW - Resorcinol
KW - Hydroxyl radicals
U2 - 10.1016/j.apcatb.2013.09.051
DO - 10.1016/j.apcatb.2013.09.051
VL - 148-14
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
Ortega-Gómez E, Ballesteros Martín MM, Esteban García B, Sánchez Pérez JA, Fernandez-Ibanez P. Solar photo-Fenton for water disinfection: An investigation of the competitive role of model organic matter for oxidative species. Applied Catalysis B: Environmental. 2013 Oct 9;148-14:484-489. https://doi.org/10.1016/j.apcatb.2013.09.051