Radiação Ultravioleta para a Inativação de Microrganismos em Ambientes Públicos

Luciano Bachmann; Gilberto Ubida Leite Braga

doi:10.29384/rbfm.2022.v16.19849001605

Authors

Luciano Bachmann Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo https://orcid.org/0000-0001-6622-251X
Gilberto Ubida Leite Braga https://orcid.org/0000-0002-4787-4704

DOI:

https://doi.org/10.29384/rbfm.2022.v16.19849001605

Keywords:

Ultraviolet radiation, Virus inactivation, bacteria inactivation, indoor decontamination

Abstract

The main objective of this work was to employ and characterize radiometrically lamps system with ultraviolet radiation (UV-C) as an alterative procedure to control microorganisms spread. The Covid-19 (Coronavirus disease 2019) pandemic urges the engagement of sanitary procedure to avoid SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus) proliferation. We highlighted, in this work, the safety in use and radiometry for microorganism inactivation and exposure limits for the public. Three UV-C lamps with 30 W each one was installed in a 49 m² classroom with. The results have shown a power density above 0.0129 mW cm^-2. The required exposure time to inactivate microorganisms depends on each one and on the desired percentual of inactivation. The evaluated system is an additional sanity barrier to avoid primarily the SARS-Cov-2 proliferation and another pathogen microorganism; and evidence has that UV-C can be employed as an important tool to control pandemics.

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