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Evaluation of electrostatic sprayers and foggers for the application of disinfectants in the era of SARS-CoV-2
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Evaluation of electrostatic sprayers and foggers for the application of disinfectants in the era of SARS-CoV-2
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Journal Article
Evaluation of electrostatic sprayers and foggers for the application of disinfectants in the era of SARS-CoV-2
2021
Overview
Although research has shown that the COVID-19 disease is most likely caused by airborne transmission of the SARS-CoV-2 virus, disinfection of potentially contaminated surfaces is also recommended to limit the spread of the disease. Use of electrostatic sprayers (ESS) and foggers to rapidly apply disinfectants over large areas or to complex surfaces has emerged with the COVID-19 pandemic. ESSs are designed to impart an electrostatic charge to the spray droplets with the goal of increasing deposition of the droplets onto surfaces, thereby promoting more efficient use of the disinfectant. The purpose of this research was to evaluate several spray parameters for different types of sprayers and foggers, as they relate to the application of disinfectants. Some of the parameters evaluated included the spray droplet size distribution, the electrostatic charge, the ability of the spray to wrap around objects, and the loss of disinfectant chemical active ingredient due to the spray process. The results show that most of the devices evaluated for droplet size distribution had an average volume median diameter ≥ 40 microns, and that four out of the six ESS tested for charge/mass produced sprays of at least 0.1 mC/kg. A minimal wrap-around effect of the spray deposition onto a cylindrical object was observed. The loss of disinfectant active ingredient to the air due to spraying was minimal for the two disinfectants tested, and concurrently, the active ingredient concentrations of the liquid disinfectants sprayed and collected 3 feet (1 meter) away from the spray nozzle do not decrease.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Control
/ COVID-19
/ COVID-19 - prevention & control
/ Disinfectants - administration & dosage
/ Disinfectants - pharmacology
/ Disinfection & disinfectants
/ Disinfection - instrumentation
/ Disinfection and disinfectants
/ Droplets
/ Humans
/ Medicine and Health Sciences
/ Methods
/ R&D
/ Severe acute respiratory syndrome
/ Severe acute respiratory syndrome coronavirus 2
/ Sprayers
/ Spraying
/ Sprays
/ Surface Properties - drug effects
/ Viruses
