Synergy of MS2 disinfection by sequential exposure to tailored UV wavelengths

Hull, Natalie M.; Linden, Karl G.

doi:10.1016/j.watres.2018.06.017

Cited by 52 publications

(52 citation statements)

References 38 publications

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“…medium preassure lamps) were found to result in more effective inactivation, by activating multiple damage mechanisms [ 8 ]. UV inactivation was found as effective disinfection approach for many viruses, among them multiple bacteriophages (T4, T7, ɸ6, MS2, PR772 and ΦX174) [ 4 , [9] , [10] , [11] , [12] , [13] ], and many human and animal viruses, including SARS-CoV-1 [ [14] , [15] , [16] , [17] , [18] ].…”

Section: Introductionmentioning

confidence: 99%

UV-LED disinfection of Coronavirus: Wavelength effect

Gerchman

Mamane

Friedman

et al. 2020

Journal of Photochemistry and Photobiology B: Biology

134

128

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UV light-emitting diodes (UV LEDs) are an emerging technology and a UV source for pathogen inactivation, however low UV-LED wavelengths are still expensive and of low fluence. Our results suggest that the sensitivity of human Coronavirus (HCoV-OC43 used as SARS-CoV-2 surrogate) was wavelength dependent with 267 nm ~ 279 nm > 286 nm > 297 nm. Other viruses showed similar results, suggesting UV LED with peak emission at ~286 nm could serve as an effective tool in the fight against human Coronaviruses.

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Section: Introductionmentioning

confidence: 99%

UV-LED disinfection of Coronavirus: Wavelength effect

Gerchman

Mamane

Friedman

et al. 2020

Journal of Photochemistry and Photobiology B: Biology

134

128

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“…For example, the germicidal power of a UV-LED with 265 nm peak wavelength for inactivating MS2 virus is reported to be roughly 1.15 times higher than that of a conventional 254 nm mercury UV lamp. 48 , 49 …”

Section: Inherent Microbial Characteristicsmentioning

confidence: 99%

A Critical Review on Ultraviolet Disinfection Systems against COVID-19 Outbreak: Applicability, Validation, and Safety Considerations

Raeiszadeh

Adeli²

2020

ACS Photonics

318

270

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The global health-threatening crisis from the COVID-19 pandemic, caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), highlights the scientific and engineering potentials of applying ultraviolet (UV) disinfection technologies for biocontaminated air and surfaces as the major media for disease transmission. Nowadays, various environmental public settings worldwide, from hospitals and health care facilities to shopping malls and airports, are considering implementation of UV disinfection devices for disinfection of frequently touched surfaces and circulating air streams. Moreover, the general public utilizes UV sterilization devices for various surfaces, from doorknobs and keypads to personal protective equipment, or air purification devices with an integrated UV disinfection technology. However, limited understanding of critical UV disinfection aspects can lead to improper use of this promising technology. In this work, fundamentals of UV disinfection phenomena are addressed; furthermore, the essential parameters and protocols to guarantee the efficacy of the UV sterilization process in a human-safe manner are systematically elaborated. In addition, the latest updates from the open literature on UV dose requirements for incremental log removal of SARS-CoV-2 are reviewed remarking the advancements and existing knowledge gaps. This study, along with the provided illustrations, will play an essential role in the design and fabrication of effective, reliable, and safe UV disinfection systems applicable to preventing viral contagion in the current COVID-19 pandemic, as well as potential future epidemics.

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“…It is difficult to precisely compare UV disinfection constants because the strains of E. coli, the source of the UV lamps (low-pressure or medium-pressure mercury lamps or UV-LED), and the irradiation apparatus are different among reports. The DUV-LED WW disinfection method described here offers a unique apparatus configuration, and this apparatus is different from other previously reported UV disinfection procedures, in which contaminated suspensions were placed in Petri dishes containing magnetic spin bars and rotated during UV exposure [18][19][20][21][22][23]32,33]. However, the disinfection constant obtained in this study, K EC = 0.37 (cm 2 /mJ), almost coincides with the most frequently reported values, such as 0.29 cm 2 /mJ by using a 260 nm LED [20], 0.37 cm 2 /mJ by using a 265 nm LED [34], and 0.303 cm 2 /mJ by using a 253.7 nm mercury vapor lamp [35].…”

Section: Theoretical Analysis Of the Disinfection Ratesmentioning

confidence: 99%

Instantaneous Water Purification by Deep Ultraviolet Light in Water Waveguide: Escherichia Coli Bacteria Disinfection

Matsumoto

Tatsuno

Hasegawa

2019

Water

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The necessity of small water purification equipment has been increasing in recent years as a result of frequent natural disasters. Ultraviolet (UV) radiation treatment is an effective method for the disinfection of bacterial contaminants in water. As an emerging technology, disinfection by deep-ultraviolet light-emitting diodes (DUV-LEDs) is promising. Few studies have used the point-source characteristics of LEDs and have instead replaced mercury vapor lamps with LEDs. Here, we demonstrate the instantaneous purification of contaminated water by combining the point source characteristics of DUV-LEDs with a water waveguide (WW). The principle is based on the WW region acting as an effective DUV disinfector, whereby a high UV dose in a confined WW region can be applied to bacterial contaminants in a short period of time (around one second). We demonstrate the effect of this DUV-LED WW disinfection technique by showing the results of 3-log disinfection levels of water contaminated with Escherichia coli bacteria after a short treatment time. We believe that the combination of the point-source nature of DUV-LED emission, the water-waveguide effect, and a small photovoltaic cell paves the way toward environmentally friendly and emergency preparedness portable water purification equipment that instantaneously supplies clean water just before drinking.

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Synergy of MS2 disinfection by sequential exposure to tailored UV wavelengths

Cited by 52 publications

References 38 publications

UV-LED disinfection of Coronavirus: Wavelength effect

UV-LED disinfection of Coronavirus: Wavelength effect

A Critical Review on Ultraviolet Disinfection Systems against COVID-19 Outbreak: Applicability, Validation, and Safety Considerations

Instantaneous Water Purification by Deep Ultraviolet Light in Water Waveguide: Escherichia Coli Bacteria Disinfection

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