In Situ Evaluation of Filter Media Modified by Biocidal Nanomaterials to Control Bioaerosols in Internal Environments

© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2021..

Controlling the bioaerosol present in indoor environments has been evidenced to be extremely necessary. An alternative is to develop filter media for air conditioners that have biocidal properties. This study aimed to verify the biocidal effect of a high-efficiency particulate air (HEPA) filter medium modified with the deposition of nanoparticles on its surface. For this purpose, Ag, TiO2, and Ag/TiO2 nanoparticles were used and the antimicrobial activities of these nanomaterials against Escherichia coli, Staphylococcus aureus, and Candida albicans microorganisms were evaluated, as well as the biocidal efficacy of the modified HEPA filter with these nanomaterials in a real environment. The percentages of elimination obtained for the Ag, TiO2, and Ag/TiO2 nanomaterials, respectively, were 53%, 63%, and 68% (E. coli); 67%, 67%, and 69% (S. aureus); and 68%, 73%, and 75% (C. albicans). The HEPA filter media had their surfaces modified by aspersion and deposition of Ag, TiO2, and Ag/TiO2 nanomaterials. We could conclude that the nanoparticles adhered to the filter medium do not affect its permeability. The modified filters were arranged in an internal environment (bathroom) for the collection of the bioaerosols, and after the collection, the filter cake was plated and arranged to grow in a liquid medium. The results showed that the filters have 100% of biocidal action in passing air, and 55.6%, 72.2%, and 81% of inhibition to microbial growth in their surface for modification with Ag, TiO2, and Ag/TiO2, respectively, compared to unmodified filters.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:232

Enthalten in:

Water, air, and soil pollution - 232(2021), 5 vom: 12., Seite 176

Sprache:

Englisch

Beteiligte Personen:

de Freitas Rosa Remiro, Paula [VerfasserIn]
de Sousa, Cristina Paiva [VerfasserIn]
Alves, Henrique Cezar [VerfasserIn]
Bernardo, André [VerfasserIn]
Aguiar, Mônica Lopes [VerfasserIn]

Links:

Volltext

Themen:

Air filtration
Bioaerosol
Biocidal nanomaterials
Indoor pollution
Journal Article

Anmerkungen:

Date Revised 18.02.2022

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1007/s11270-021-05105-3

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM324506112