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Electrostatic Spray Disinfection Using Nano-Engineered Solution on Frequently Touched Surfaces in Indoor and Outdoor Environments.
Purwar, Tanya; Dey, Shamya; Al-Kayyali, Osama Zaid Ali; Zalar, Aaron Floyd; Doosttalab, Ali; Castillo, Luciano; Castano, Victor M.
  • Purwar T; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
  • Dey S; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
  • Al-Kayyali OZA; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
  • Zalar AF; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
  • Doosttalab A; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
  • Castillo L; School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
  • Castano VM; Centro de Física Aplicada Tecnología Avanzada, Universidad Nacional Autónoma de México, Juriquilla, Querétaro 76230, Mexico.
Int J Environ Res Public Health ; 19(12)2022 06 13.
Article in English | MEDLINE | ID: covidwho-1911314
ABSTRACT
The COVID-19 pandemic has resulted in high demand for disinfection technologies. However, the corresponding spray technologies are still not completely optimized for disinfection purposes. There are important problems, like the irregular coverage and dripping of disinfectant solutions on hard and vertical surfaces. In this study, we highlight two major points. Firstly, we discuss the effectiveness of the electrostatic spray deposition (ESD) of nanoparticle-based disinfectant solutions for systematic and long-lasting disinfection. Secondly, we show that, based on the type of material of the substrate, the effectiveness of ESD varies. Accordingly, 12 frequently touched surface materials were sprayed using a range of electrostatic spray system parameters, including ion generator voltage, nozzle spray size and distance of spray. It was observed that for most cases, the surfaces become completely covered with the nanoparticles within 10 s. Acrylic, Teflon, PVC, and polypropylene surfaces show a distinct effect of ESD and non-ESD sprays. The nanoparticles form a uniform layer with better surface coverage in case of electrostatic deposition. Quantitative variations and correlations show that 1.5 feet of working distance, an 80 µm spray nozzle diameter and an ion generator voltage of 3-7 kV ensures a DEF (differential electric field) that corresponds to an optimized charge-to-mass ratio, ensuring efficient coverage of nanoparticles.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Disinfectants / COVID-19 Type of study: Observational study / Systematic review/Meta Analysis Limits: Humans Language: English Year: 2022 Document Type: Article Affiliation country: Ijerph19127241

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Disinfectants / COVID-19 Type of study: Observational study / Systematic review/Meta Analysis Limits: Humans Language: English Year: 2022 Document Type: Article Affiliation country: Ijerph19127241