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Environ Sci Pollut Res Int

Title:		Photodegradation of gaseous toluene and disinfection of airborne microorganisms from polluted air using immobilized TiO(2) nanoparticle photocatalyst-based filter
Author(s):		Mohamed EF; Awad G;
Address:		"Air Pollution Department, Environmental Research Division, National Research Centre, 33 EL Bohouth St., Dokki, Giza, 12622, Egypt. Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, 33 EL Bohouth St., Dokki, Giza, 12622, Egypt. awad_gamal7@yahoo.fr"
Journal Title:		Environ Sci Pollut Res Int
Year:		2020
Volume:		20200419
Issue:		19
Page Number:		24507 - 24517
DOI:		10.1007/s11356-020-08779-0
ISSN/ISBN:		1614-7499 (Electronic) 0944-1344 (Linking)
Abstract:		"Photocatalytic oxidation (PCO) has been described as an advanced technology to remove toxic volatile organic compounds (VOCs) and airborne microorganisms from indoor air environments. This technique is economic, stable, safe, and capable to remove a wide variety of organic contaminants under UV irradiation. This study presents a case study on the effect of a fabricated filter in the removal of toluene at 26 mg/L and disinfection of ambient air under a given operating condition. The principal goals of this study were to synthesize Ag nanoparticles/TiO(2) filter for the first time via the deposition of Ag nanoparticles on a commercial immobilized TiO(2) tissue sheet by impregnation technique and to investigate the performance of this prepared Ag/TiO(2) tissue based filter system for toluene removal as well as to remove airborne microorganisms from indoor air. The results illustrated that under the experimental conditions, Ag/TiO(2)-based filter was able to disinfect well the microorganisms. The performance of Ag/TiO(2) filter shows two different stages; the first one is a slight adsorption phase in dark with approximately 15% of toluene removal within 60 min. The second stage is a photooxidation phase under UV irradiation in which the toluene removal efficiency was significantly enhanced with extension of the operational time and reached 97% during this stage. Additionally, the Ag/TiO(2) filter has a higher disinfection capacity of airborne microorganisms that completely removed to reach 100% after 300 min of application. This filter could be practically introduced as an effective system in industrial, hospital, and home applications for air purification. Graphical abstract"
Keywords:		Catalysis Disinfection Gases *Metal Nanoparticles Photolysis Silver Titanium *Toluene Ag nanoparticles Air pollutant filter Airborne microorganisms Immobilized TiO2 tissue Photocatalyst Toluene;
Notes:		"MedlineMohamed, Elham F Awad, Gamal eng Germany 2020/04/21 Environ Sci Pollut Res Int. 2020 Jul; 27(19):24507-24517. doi: 10.1007/s11356-020-08779-0. Epub 2020 Apr 19"