Lethal synergy of solar UV-radiation and H2O2 on wild Fusarium solani spores in distilled and natural well water

Sichel, C.; Fernández‐Ibáñez, Pilar; Cara, M. de; Tello, Julio C.

doi:10.1016/j.watres.2009.01.017

Cited by 73 publications

(37 citation statements)

References 54 publications

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“…The yellow color produced in the reaction is due to the formation of pertitanic acid (Eisenberg, 1943). The absorbance vs. concentration relationship was linear in the range 0.1e100 mg L À1 (Sichel et al, 2009 …”

Section: Methodsmentioning

confidence: 94%

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: Methodsmentioning

confidence: 94%

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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“…High temperatures during SODIS enhanced inactivation efficacy, 6 logs in 6 hours could be expected at 45°C and with a fluence rate of 1.34kJ/cm 2 [63]. It has been proven that solar disinfection is very effective in spores of phytopathogenic fungi, which are responsible for diseases of great incidence in agriculture and hospital distribution systems [64,65]. It is possible to inactivate about 1000 colonies per millilitre of spores of five types of the Fusarium species (F. equiseti, F. verticillioides, F. solani, F. oxysporum, and F. antophilum) with different level in bottle reactor during 1-6 h exposure to natural solar radiation in perfectly sunny day [66].…”

Section: Inactivation Of Microorganismsmentioning

confidence: 99%

Drinking Water Disinfection by Solar Radiation

Teksoy¹,

Eleren²

2017

eer

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A primary concern of developing countries throughout the world is that of obtaining safe drinking water. Waterborne diseases are still common in developing countries since drinking water sources are contaminated and the conventional rural water treatment plants are often inefficient to produce safe drinking water. This situation in developing countries is a major problem in terms of preventing public health. It is estimated that diarrhea accounted for 99% of the 69 million deaths among children before the age of five. Inadequate operation and maintenance after installations caused by a lack of trained operators, by a treacherous supply of chemicals and spare parts, and by financial problems lead to produce unhealthy drinking water. Since major urban water supplies are also not always capable of maintaining a regular supply of qualitatively good water, the distributed water is often considered unsafe for direct consumption. Treatment of water at the household level (etc. boiling) or purchasing of mineral water for consumption is more real than an exception in urban areas of developing countries. Recently, another small-scale approach using the lethal effect of sunlight has gained importance to sanitary contaminated water. Solar disinfection (SODIS) is one of the simplest methods for providing acceptable quality drinking water and consists of filling transparent containers (plastic bags, plastic bottles or glass bottles) with water and exposing the containers to sunlight for approximately 6 hours. Because of the low cost and easy usage, solar disinfection is commonly used in developing countries in Asia, Africa and South America. The aim of this literature review is to give information about solar disinfection mechanism, to compare the efficiency of solar disinfection on different microorganisms based on the past studies, and to discuss the several applications of solar disinfection in the world.

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“…In general, photocatalytic processes, both homogeneous and heterogeneous, in the presence of iron and hydrogen peroxide have been demonstrated effective against a wide variety of resistant microorganism such as viruses (Kim et al, 2010), helminth eggs (Bandala et al, 2011a,b;Guisar et al, 2007), bacteria and spores (Dunlop et al, 2008;Bandala et al, 2009;Bandala et al, 2011c;Sichel et al, 2009;Castillo-Ledezma et al, 2011).…”

Section: Biological Mechanismsmentioning

confidence: 99%

“…In the same way, ROS may produce additional oxidative stress in the cells through Fenton and Heber-Weiss reaction (Dunlop et al, 2008) generating damage in all the cell components including proteins, lipids and DNA. In the case of DNA damage, produced by pyrimidine dimmers formation by the generation of covalent bonds among the bases in the same DNA chain (Sichel et al, 2009), it generates mutations that may lead to loss of functional capability and death of cell . At the same time, when microorganisms are exposed to ultraviolet radiation (UV, λ ≤ 400 nm) during the photocatalytic reaction, DNA damage occurred directly through the radiation absorption by cell chromophores, which absorb radiation and produce heat.…”

Section: Biological Mechanismsmentioning

confidence: 99%