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Article

Photocatalytic Bactericidal Performance of LaFeO3 under Solar Light: Kinetics, Spectroscopic and Mechanistic Evaluation

1
Institute of Environmental Sciences, Bogazici Univresity, 34342 Istanbul, Turkey
2
INSTM and Department of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Terry Gentry
Water 2021, 13(9), 1135; https://doi.org/10.3390/w13091135
Received: 27 March 2021 / Revised: 15 April 2021 / Accepted: 17 April 2021 / Published: 21 April 2021
(This article belongs to the Special Issue New Perspectives in Photocatalytic Water Treatment)
Lanthanum orthoferrites are a versatile class of catalysts. Here, the photocatalytic bactericidal performance of LaFeO3 (LF) to inactivate pathogenic microorganisms, i.e., Escherichia coli (E. coli), in water under simulated solar irradiation conditions was investigated. Various competing and contributing factors were covered to visualize the reaction medium consisting of E. coli K12 cells, organic sub-fractions formed by cell destruction, and LF surface. LF solar photocatalytic inactivation (SPCI) kinetics revealed the highest inactivation rate in ultrapure water as expected, followed by distilled water (DW), aqueous solution containing anions and cations (WM) and saline solution (SS). Characterization of the released organic matter was achieved by UV-vis and fluorescence spectroscopic techniques as well as organic carbon contents (DOC). Upon SPCI, significant amounts of K+ along with released protein contents were detected expressing cell wall destruction and lysis. Under the specified experimental conditions, in the presence of released intracellular organic and inorganic components via cell lysis, a significant count of E. coli was still present in SS, whereas almost all bacteria were removed in other matrices due to various challenging reasons. Based on the presented data, SPCI of E. coli using LF as a novel photocatalyst was successfully demonstrated as an alternative and promising method for disinfection purposes. View Full-Text
Keywords: E. coli; lanthanum orthoferrite; perovskite; photocatalytic inactivation E. coli; lanthanum orthoferrite; perovskite; photocatalytic inactivation
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MDPI and ACS Style

Birben, N.C.; Lale, E.; Pelosato, R.; Uyguner Demirel, C.S.; Natali Sora, I.; Bekbolet, M. Photocatalytic Bactericidal Performance of LaFeO3 under Solar Light: Kinetics, Spectroscopic and Mechanistic Evaluation. Water 2021, 13, 1135. https://doi.org/10.3390/w13091135

AMA Style

Birben NC, Lale E, Pelosato R, Uyguner Demirel CS, Natali Sora I, Bekbolet M. Photocatalytic Bactericidal Performance of LaFeO3 under Solar Light: Kinetics, Spectroscopic and Mechanistic Evaluation. Water. 2021; 13(9):1135. https://doi.org/10.3390/w13091135

Chicago/Turabian Style

Birben, Nazmiye Cemre, Ezgi Lale, Renato Pelosato, Ceyda Senem Uyguner Demirel, Isabella Natali Sora, and Miray Bekbolet. 2021. "Photocatalytic Bactericidal Performance of LaFeO3 under Solar Light: Kinetics, Spectroscopic and Mechanistic Evaluation" Water 13, no. 9: 1135. https://doi.org/10.3390/w13091135

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