The hygienic principles of using bactericidal ultraviolet monochrome led irradiators of the open type for premises air disinfecting

Nazarenko, V.I.; Cherednichenko, I. M.; Leonov, Yu. I.; Pochta, V. N.; Shevchenko, A.V.; Burdeina, Nataliia; Yarygin, A.V.

doi:10.33573/ujoh2022.03.216

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…In work [5], only the coverage of the area of the room by radiation is considered for geometric reasons without providing quantitative characteristics. Paper [6] shows the principle possibility of using ultraviolet light-emitting diodes in the presence of people, but a sufficient volume of quantitative data is not provided. Paper [7] shows the possibility of air ionization using an ultrasonic emitter.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining the efficiency of using led sources of ultraviolet radiation for ionization and disinfection of room air

Glyva

Nazarenko

Burdeina

et al. 2023

EEJET

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This paper reports a study into the possibility of using LED systems of ultraviolet radiation for air ionization and disinfection of air and indoor surfaces in the presence of people. It has been established that UV LED lamps with 120° opening angles have parameters under which radiation intensity does not exceed 30 J/m2 at distances of 2 meters. Based on experimental data, a methodology for designing the placement of lamps in the room was devised, which meets the requirements of the SBM-2015 standard and the European Directive 2006/25/EU. The use of LED emitters with a total intensity of up to 25 J/m2 increases the concentration of aero ions. The background concentrations were 140‒180 cm-3 (positive) and 160‒190 cm-3 (negative). The minimum permissible level is 500 cm-3. As a result of irradiation, the concentrations were 1100‒1460 cm-3 (positive) and 1260‒1470 cm-3 (negative). The influence of the recirculator-air purifier on the concentration of aero ions has not been established. The ionization process began immediately after turning on the irradiation systems in the entire volume of the premises (4‒5 meters from the source). The dynamic equilibrium of aero ion concentrations was established within 10‒15 minutes after the irradiation was switched on. The presence of a large number of people (up to 0.97 m2 per person) did not affect the concentration of aero ions. Under the combined effect of ultraviolet radiation and a recirculator-air purifier, the number of mold fungi colonies decreased by 20 times. Under the influence of only ultraviolet radiation – by 2.3 times. The decrease in the number of microbes under the combined effect was 1.6 times, and under the effect of only ultraviolet radiation – 2.8 times

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining the efficiency of using led sources of ultraviolet radiation for ionization and disinfection of room air

Glyva

Nazarenko

Burdeina

et al. 2023

EEJET

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Led Sources of Ultraviolet Radiation: Methodical and Instrumental Support Taking Into Account the Harmonization of Eu and Ukrainian Legislation

Shabashkevich

2023

Optoelektron. napìvprovìd. teh.

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One of the effective means of disinfecting premises is its irradiation with ultraviolet bactericidal radiation (UVBV), which is in the UV-C region (200 nm - 280 nm) and for mercury lamps has a radiation peak at a wavelength of 254 nm. However, UVBV should be used competently and with appropriate caution in terms of its intensity and safety, avoiding risks of damage to human skin and eyes. Therefore, UVBV is used indoors, mainly in the absence of a person. But when using sources of this type of optical radiation in the presence of a person, proper attention should be paid to controlling the intensity of UVBV and the time of its exposure. At the same time, it should be noted that the active processes of harmonization of the legislation of the EU and Ukraine require the modernization of the regulatory and methodological base for the measurement and hygienic assessment of ultraviolet radiation in the production environment and in the environment, significantly expanding the possibilities of using UVB sources, including in the presence of humans. Therefore, the purpose of the study is to create the basis for appropriate methodological recommendations for the use of bactericidal ultraviolet monochrome LED sources for disinfection of air and surfaces in rooms, as well as the formulation of appropriate requirements for UV radiometers, which should ensure control of the technical parameters of the mentioned ultraviolet monochrome LED sources. As a result of the research, scientific principles were proposed for the instrumental and methodical control of the safe use of bactericidal ultraviolet monochrome LED sources for the improvement of air and surfaces in premises of various purposes, taking into account the requirements of the legislation of Ukraine and the EU. The technical characteristics of the available UVBV LED sources were analyzed, based on which the medical and technical requirements for UV radiometers were formulated, which should ensure control of the intensity and actinic dose of UV radiation in accordance with the requirements of DSTU EN 62471:2017 "Safety of photobiological lamps and lamp systems (EN 62471:2008 , IDT; IES 62471:2006, MOD)". Design approaches to the formation of the spectral range of RG sensitivity by using appropriate light filters, including for the blue light range (380-480 nm), have been determined. A technique for correcting the spectral characteristic of the RG sensitivity is proposed, which contributes to the reduction of the intensity measurement error created by different LED sources.

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The influence of UV-LED lamps radiation on indicators of microflora in university auditoriums

Nazarenko¹,

Nykyforuk²,

Glyva³

et al. 2023

Ukr. ž. probl. med. pr.

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The hygienic principles of using bactericidal ultraviolet monochrome led irradiators of the open type for premises air disinfecting

Cited by 3 publications

References 3 publications

Determining the efficiency of using led sources of ultraviolet radiation for ionization and disinfection of room air

Determining the efficiency of using led sources of ultraviolet radiation for ionization and disinfection of room air

Led Sources of Ultraviolet Radiation: Methodical and Instrumental Support Taking Into Account the Harmonization of Eu and Ukrainian Legislation

The influence of UV-LED lamps radiation on indicators of microflora in university auditoriums

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