Bactericidal effect of ultraviolet C light-emitting diodes: Optimization of efficacy toward foodborne pathogens in water

Park, Seulki; Jo, Du-Min; Kang, Min Jae; Khan, Fazlurrahman; Hong, Sung Doo; Kim, Chang Youl; Kim, Young‐Mog; Ryu, Uh-Chan

doi:10.1016/j.jphotobiol.2021.112277

Cited by 6 publications

(11 citation statements)

References 26 publications

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“…Few studies [5,10,47,48,50,55] were unable to achieve disinfection levels, presenting biological reductions of less than 3-log. Most of the studies in this scientific field [2,11,26,47,49,52,53,[56][57][58]60] accomplished disinfection levels, and three studies achieved sterilization levels [19,51,54,59]. Such results give confidence for users to apply UVC for its decontamination capabilities in the water.…”

Section: Water Treatmentmentioning

confidence: 84%

“…There is a special interest in water treatment [2,5,10,11,19,26,[47][48][49][50][51][52][53][54][55][56][57][58][59][60][61]. Several reasons are at the core of this interest, such as people's limited access to potable water and industrial applications [52,57].…”

Section: Water Treatmentmentioning

confidence: 99%

“…For example, substances turning into opaquer liquids would reduce UV treatment effectiveness at different levels [19,51]. Water circulation and exposure time improve water decontamination effectiveness [56]. Interestingly, water volume causes a dubious effect on UVC treatment, insignificant [56] or slightly better in lower volumes [57].…”

Section: Water Treatmentmentioning

confidence: 99%

“…Water circulation and exposure time improve water decontamination effectiveness [56]. Interestingly, water volume causes a dubious effect on UVC treatment, insignificant [56] or slightly better in lower volumes [57]. Moreover, the UVC irradiation types (continuous or pulsed) provide comparable results [49].…”

Section: Water Treatmentmentioning

confidence: 99%

“…Gram-negative bacteria were Enterobacter spp. [ [23,34], Legionella pneumophila [32], Pseudomonas aeruginosa [21,22,[28][29][30]34,36,50,57], Pseudomonas alcaligenes [69], Pseudomonas brenneri [54], Raoultella ornithinolytica [54], Salmonella enteritidis [18], Salmonella senftenberg [18], Salmonella tennessee [18], Salmonella typhimurium [1, 6,7,34,43,45,51,56,59,[61][62][63][67][68][69]72], Serratia marcescens [44,46,69], and Vibrio cholerae [57]. Whereas, Gram-positive bacteria were Bacillus anthracis [71], Bacillus atrophaeus [71], Bacillus cereus [56,60], Bacillus pumilus [60], Bacillus subtilis [10], Bacillus spizizenii [67], Enterococcus faecalis [22], Enterococcus faecium [23]<...…”

Section: Bacteriamentioning

confidence: 99%

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A Comprehensive Analysis of the UVC LEDs’ Applications and Decontamination Capability

et al. 2022

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The application of light-emitting diodes (LEDs) has been gaining popularity over the last decades. LEDs have advantages compared to traditional light sources in terms of lifecycle, robustness, compactness, flexibility, and the absence of non-hazardous material. Combining these advantages with the possibility of emitting Ultraviolet C (UVC) makes LEDs serious candidates for light sources in decontamination systems. Nevertheless, it is unclear if they present better decontamination effectiveness than traditional mercury vapor lamps. Hence, this research uses a systematic literature review (SLR) to enlighten three aspects: (1) UVC LEDs’ application according to the field, (2) UVC LEDs’ application in terms of different biological indicators, and (3) the decontamination effectiveness of UVC LEDs in comparison to conventional lamps. UVC LEDs have spread across multiple areas, ranging from health applications to wastewater or food decontamination. The UVC LEDs’ decontamination effectiveness is as good as mercury vapor lamps. In some cases, LEDs even provide better results than conventional mercury vapor lamps. However, the increase in the targets’ complexity (e.g., multilayers or thicker individual layers) may reduce the UVC decontamination efficacy. Therefore, UVC LEDs still require considerable optimization. These findings are stimulating for developing industrial or final users’ applications.

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