Please use this identifier to cite or link to this item:
https://hdl.handle.net/10216/120428
Author(s): | Rodrigues-Silva C. Miranda S.M. Lopes F.V.S. Silva M. Dezotti M. Silva A.M.T. Faria J.L. Boaventura R.A.R. Vilar V.J.P. Pinto E. |
Title: | Bacteria and fungi inactivation by photocatalysis under UVA irradiation: liquid and gas phase |
Publisher: | Springer Verlag (Germany) |
Issue Date: | 2017 |
Abstract: | In the last decade, environmental risks associated with wastewater treatment plants (WWTPs) have become a concern in the scientific community due to the absence of specific legislation governing the occupational exposure limits (OEL) for microorganisms present in indoor air. Thus, it is necessary to develop techniques to effectively inactivate microorganisms present in the air of WWTPs facilities. In the present work, ultraviolet light A radiation was used as inactivation tool. The microbial population was not visibly reduced in the bioaerosol by ultraviolet light A (UVA) photolysis. The UVA photocatalytic process for the inactivation of microorganisms (bacteria and fungi, ATCC strains and isolates from indoor air samples of a WWTP) using titanium dioxide (TiO2 P25) and zinc oxide (ZnO) was tested in both liquid-phase and airborne conditions. In the slurry conditions at liquid phase, P25 showed a better performance in inactivation. For this reason, gas-phase assays were performed in a tubular photoreactor packed with cellulose acetate monolithic structures coated with P25. The survival rate of microorganisms under study decreased with the catalyst load and the UVA exposure time. Inactivation of fungi was slower than resistant bacteria, followed by Gram-positive bacteria and Gram-negative bacteria. [Figure not available: see fulltext.] © 2016, Springer-Verlag Berlin Heidelberg. |
Subject: | bacterium catalysis catalyst disinfection environmental risk fungus indoor air inhibition irradiation occupational exposure photolysis pollutant removal slurry ultraviolet A radiation wastewater treatment plant Bacteria (microorganisms) Fungi Negibacteria Posibacteria cellulose cellulose acetate titanium titanium dioxide waste water zinc oxide analogs and derivatives bacterium catalysis chemistry fungus isolation and purification microbial viability microbiology photolysis radiation response ultraviolet radiation waste water water management Air Microbiology Bacteria Catalysis Cellulose Fungi Microbial Viability Photolysis Titanium Ultraviolet Rays Waste Water Water Purification Zinc Oxide |
URI: | https://hdl.handle.net/10216/120428 |
Source: | Environmental Science and Pollution Research, vol. 24(7), p. 6372-6381 |
Related Information: | info:eu-repo/grantAgreement/FCT/5876/147268/PT |
Document Type: | Artigo em Revista Científica Internacional |
Rights: | restrictedAccess |
Appears in Collections: | CIIMAR - Artigo em Revista Científica Internacional |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Rodrigues-Silva C_2017.pdf Restricted Access | 672.24 kB | Adobe PDF | Request a copy |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.