학술논문
Photo-Fenton and TiO 2 Photocatalytic Inactivation of Model Microorganisms under UV-A; Comparative Efficacy and Optimization.
Document Type
Academic Journal
Author
Kanata E; Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Paspaltsis I; Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Sotiriadis S; Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Berberidou C; Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Tsoumachidou S; Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Dafou D; Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Xanthopoulos K; Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Centre for Research and Technology Hellas, Institute of Applied Biosciences, 57001 Thermi, Greece.; Arsenakis M; Laboratory of General Microbiology, Department of Genetics Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Arsenakis A; STERIMED SA, G' Fassi, Building Block 52b, Sindos Industrial Area, 57022 Thessaloniki, Greece.; Poulios I; Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.; Sklaviadis T; Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
Source
Publisher: MDPI Country of Publication: Switzerland NLM ID: 100964009 Publication Model: Electronic Cited Medium: Internet ISSN: 1420-3049 (Electronic) Linking ISSN: 14203049 NLM ISO Abbreviation: Molecules Subsets: MEDLINE
Subject
Language
English
Abstract
Photocatalytic inactivation of pathogens in aqueous waste is gaining increasing attention. Several homogeneous and heterogeneous photocatalytic protocols exist using the Fenton's reagent and TiO 2 , respectively. A comprehensive study of homogeneous and heterogeneous photocatalysis on a range of microorganisms will significantly establish the most efficient method. Here, we report a comparative study of TiO 2 - and Fe +3 -based photocatalytic inactivation under UV-A of diverse microorganisms, including Gram-positive ( Staphylococcus aureus ) and Gram-negative ( Escherichia coli ) bacteria, bacterial spores ( Bacillus stearothermophilus spores) and viruses (MS2). We also present data on the optimization of TiO 2 photocatalysis, including optimal catalyst concentration and H 2 O 2 supplementation. Our results indicate that both photo-Fenton and TiO 2 could be successfully applied for the management of microbial loads in liquids. Efficient microorganism inactivation is achieved with homogeneous photocatalysis (7 mg/L Fe +3 , 100 mg/L H 2 O 2 , UV-A) in a shorter processing time compared to heterogeneous photocatalysis (0.5 g/L TiO 2 , UV-A), whereas similar or shorter processing is required when heterogenous photocatalysis is performed using microorganism-specific optimized TiO 2 concentrations and H 2 O 2 supplementation (100 mg/L); higher H 2 O 2 concentrations further enhance the heterogenous photocatalytic inactivation efficiency. Our study provides a template protocol for the design and further application for large-scale photocatalytic approaches to inactivate pathogens in liquid biomedical waste.