The effect of Fe2+, Fe3+, H2O2 and the photo-Fenton reagent at near neutral pH on the solar disinfection (SODIS) at low temperatures of water containing Escherichia coli K12

Spuhler, Dorothee; Rengifo‐Herrera, Julián A.; Pulgarín, C.

doi:10.1016/j.apcatb.2010.02.010

Cited by 262 publications

(201 citation statements)

References 78 publications

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“…UV-B (290e320 nm) radiation causes direct DNA damage by inducing the formation of DNA photoproducts. The accumulation of DNA photoproducts can be lethal to cells through the blockage of DNA replication and RNA transcription (Spuhler et al, 2010;Bosshard et al, 2009;Rincon and Pulgarin, 2007;Hoerter et al, 1996). The H 2 O 2 /simulated solar light system showed an inactivation rate of 0.058 min À1 , approximately 25% greater than with simulated solar light only.…”

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

“…Moreover, the presence of H 2 O 2 in the extracellular medium may lead to an increase in membrane permeability, facilitating the diffusion of Fe 2þ (Spuhler et al, 2010;MoncayoLasso et al, 2009;Rincon and Pulgarin, 2007;Cho et al, 2004). There are some processes that can explain the inhibition of photo-Fenton by HCO À 3 .…”

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

“…This enhanced inactivation could be due to several different processes: (1) the diffusion of H 2 O 2 into the cell and (2) direct attack from H 2 O 2 to the cell membrane. The photolysis process of H 2 O 2 does not play a role in bacterial inactivation because photon absorption of H 2 O 2 is not significant at the wavelength used (l > 290 nm) and the quantum yield is low (Spuhler et al, 2010;Malato et al, 2009). On the other hand, when H 2 O 2 is present in the extracellular medium, its diffusion into the cell is possible since it is a stable and uncharged molecule.…”

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

“…H 2 O 2 diffusion into the cell increases the possibility of OH generation via Fenton reactions with intracellular iron. If the free iron is not available, the H 2 O 2 can cause the oxidation of iron-sulfur clusters ([4Fee4S]) and the release of iron which may contribute to the Fenton reaction (Spuhler et al, 2010;Imlay, 2008Imlay, , 2003. Furthermore, H 2 O 2 can directly attack the cell membrane by lipid peroxidation, affecting viability of the cell and increasing the membrane permeability (Halliwell and Aruoma, 1991).…”

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

“…UV/H 2 O 2 has been recently reported for the disinfection of seawater (Penru et al, 2012). Others as Fenton and photoFenton have been reported in the degradation of contaminants and in water disinfection (Spuhler et al, 2010 Fenton (Eq. (1)) and photo-Fenton processes (Eqs.…”

Section: Introductionmentioning

confidence: 99%

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Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV–Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater

et al. 2013

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Fe 2þ and 10 mg L À1 of H 2 O 2 , led to the fastest bacterial inactivation kinetics. Using H 2 O 2 / UV 254 high disinfection rates were obtained similar to those obtained with photo-Fenton under UV 254 light. In Milli-Q water, the rate of inactivation for Escherichia coli was higher than in Leman Lake water and seawater due to the lack of inorganic ions affecting negatively bacteria inactivation. The presence of bicarbonate showed scavenging of the OH radicals generated in the treatment of photo-Fenton and H 2 O 2 /UV 254 . Despite the negative effect of inorganic ions, especially HCO 3 -, the disinfection treatments with AOPs in lake water and seawater improved significantly the disinfection compared to light alone (simulated sunlight and UV 254 ). In the treatment of photo-Fenton with simulated sunlight, dissolved organic matter had a beneficial effect by increasing the rate of inactivation. This is associated with the formation of Fe 3þ -organo photosensitive complexes leading to the formation of ROS able to inactivate bacteria. This effect was not observed in the photo-

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Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

Section: E Coli Inactivation In Milli-q Watermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV–Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater

et al. 2013

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Recent Advances in the Disinfection of Water Using Nanoscale Antimicrobial Materials

Miao

Teng

Wang

et al. 2018

Adv Materials Technologies

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The microbial contamination of water is highlighted as a global problem that threatens human life. Specifically, the lack of clean and safe water has resulted in a high number of deaths annually and thus poses a great challenge to humans. The traditional water purification methods typically consume high amounts of energy, exhibit low disinfection efficiency, and result in the production of toxic by‐products. Therefore, the development of methods for efficient water disinfection is of great significance. Nanomaterials have shown promising prospects in water disinfection due to their unique properties. Recent progress in the use of nanomaterials for water disinfection is summarized herein. The recently developed methods for the synthesis of antibacterial nanomaterials, including metallic nanoparticles, nanosized carbide and nitrides, are depicted, and the structures, morphologies, instincts, and performances of the nanomaterials in bactericidal tests are discussed. In addition, the antibacterial mechanisms and the dominant elements influencing the antimicrobial activities of the nanomaterials are reviewed in detail. Although recent years have shown remarkable progress in water disinfection using nanomaterials, the development of disinfection agents with improved nanoeffects and performance, low toxicity, increased cost efficiency, and easier operation remains urgent.

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Degradation of Structurally Defined Graphene Nanoribbons by Myeloperoxidase and the Photo‐Fenton Reaction

et al. 2020

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As an emerging member of the graphene family, structurally defined graphene nanoribbons (GNRs) have shown promising applications in various fields. The evaluation of the degradability of GNRs is particularly important for assessing the persistence level and risk of these materials in living organisms and the environment. However, there is a void in the study of the degradation of GNRs. Here, we report the degradation behavior of GNRs in the presence of human myeloperoxidase (hMPO) or treated with the photo‐Fenton (PF) reaction. With the assistance of potassium hydroxide or imidazole, which facilitates the dispersion of GNRs in the aqueous solution, GNRs underwent only partial degradation after 25‐hour incubation with hMPO, while, the PF reaction degraded GNRs almost completely after 120 hours. These results indicate that structurally precise GNRs can be efficiently degraded under suitable conditions, providing more opportunities for future applications in different fields.

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The effect of Fe2+, Fe3+, H2O2 and the photo-Fenton reagent at near neutral pH on the solar disinfection (SODIS) at low temperatures of water containing Escherichia coli K12

Cited by 262 publications

References 78 publications

Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV–Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater

Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV–Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater

Recent Advances in the Disinfection of Water Using Nanoscale Antimicrobial Materials

Degradation of Structurally Defined Graphene Nanoribbons by Myeloperoxidase and the Photo‐Fenton Reaction

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