Photolysis and TiO2 Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and Microorganisms

Efficiencies of various treatments for UVC photolysis (ultraviolet light-C at 254 nm), VUV photolysis (vacuum ultraviolet light at 254 nm and 185 nm), UVC-assisted titanium dioxide photocatalysis (UVC-TiO2), and VUV-assisted titanium dioxide photocatalysis (VUV-TiO2...

Full description

Bibliographic Details
Main Authors:	Sung Won Choi, Hafiz Muhammad Shahbaz, Jeong Un Kim, Da-Hyun Kim, Sohee Yoon, Se Ho Jeong, Jiyong Park, Dong-Un Lee
Format:	Article
Language:	English
Published:	MDPI AG 2020-06-01
Series:	Applied Sciences
Subjects:	photolysis UVC VUV TiO2 photocatalysis pesticide microorganism
Online Access:	https://www.mdpi.com/2076-3417/10/13/4493

id	doaj-e3a27f7bb4854826a9f2a3a9529298eb
record_format	Article
spelling	doaj-e3a27f7bb4854826a9f2a3a9529298eb2020-11-25T03:23:13ZengMDPI AGApplied Sciences2076-34172020-06-01104493449310.3390/app10134493Photolysis and TiO<sub>2</sub> Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and MicroorganismsSung Won Choi0Hafiz Muhammad Shahbaz1Jeong Un Kim2Da-Hyun Kim3Sohee Yoon4Se Ho Jeong5Jiyong Park6Dong-Un Lee7Department of Biotechnology, Yonsei University, Seoul 03722, KoreaDepartment of Food Science and Human Nutrition, University of Veterinary and Animal Sciences, Lahore 54000, PakistanDepartment of Biotechnology, Yonsei University, Seoul 03722, KoreaDepartment of Biotechnology, Yonsei University, Seoul 03722, KoreaDepartment of Biotechnology, Yonsei University, Seoul 03722, KoreaDepartment of Food Science and Technology, Chung-Ang University, Anseong 17546, KoreaDepartment of Biotechnology, Yonsei University, Seoul 03722, KoreaDepartment of Food Science and Technology, Chung-Ang University, Anseong 17546, KoreaEfficiencies of various treatments for UVC photolysis (ultraviolet light-C at 254 nm), VUV photolysis (vacuum ultraviolet light at 254 nm and 185 nm), UVC-assisted titanium dioxide photocatalysis (UVC-TiO<sub>2</sub>), and VUV-assisted titanium dioxide photocatalysis (VUV-TiO<sub>2</sub>) were investigated for the degradation of pesticides including pyraclostrobin, boscalid, fludioxonil, and azoxystrobin and inactivation of microorganisms <i>Escherichia coli</i> K12 as a surrogate for <i>E. coli</i> O157:H7 and <i>Saccharomyces cerevisiae</i> in aqueous solutions and on the surface of fresh cut carrots. The degradation efficiencies of VUV were higher than for UVC on pesticides in aqueous solutions. However, there was no significant difference between degradation efficiencies for UVC and UVC-TiO<sub>2</sub> treatments, and between VUV and VUV-TiO<sub>2</sub> treatments. UVC, VUV, UVC-TiO<sub>2</sub>, and VUV-TiO<sub>2</sub> showed similar inactivation effects against <i>E. coli </i>K12 and <i>S. cerevisiae </i>in aqueous solutions. The combined use of UVC and VUV treatments (combined UV) and combined use of UVC-TiO<sub>2</sub> and VUV-TiO<sub>2</sub> treatments (combined UV-TiO<sub>2</sub>) showed higher efficiencies (72–94% removal) for the removal of residual pesticides on fresh cut carrots than bubble water washing (53–73% removal). However, there was no significant difference in removal efficiency between combined UV and combined UV-TiO<sub>2 </sub>treatments. For <i>E. coli</i> K12 and <i>S. cerevisiae</i> on fresh cut carrots, the combined UV-TiO<sub>2</sub> treatment (1.5 log and 1.6 log reduction, respectively) showed slightly higher inactivation effects than combined UV (1.3 log and 1.2 log reduction, respectively). Photolysis and TiO<sub>2</sub> photocatalytic treatments under UV irradiation, including VUV as a light source, showed potential for the simultaneous degradation of pesticides and microorganisms as a non-chemical and residue-free technique for surface disinfection of fresh produce.https://www.mdpi.com/2076-3417/10/13/4493photolysisUVCVUVTiO2 photocatalysispesticidemicroorganism
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Sung Won Choi Hafiz Muhammad Shahbaz Jeong Un Kim Da-Hyun Kim Sohee Yoon Se Ho Jeong Jiyong Park Dong-Un Lee
spellingShingle	Sung Won Choi Hafiz Muhammad Shahbaz Jeong Un Kim Da-Hyun Kim Sohee Yoon Se Ho Jeong Jiyong Park Dong-Un Lee Photolysis and TiO<sub>2</sub> Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and Microorganisms Applied Sciences photolysis UVC VUV TiO2 photocatalysis pesticide microorganism
author_facet	Sung Won Choi Hafiz Muhammad Shahbaz Jeong Un Kim Da-Hyun Kim Sohee Yoon Se Ho Jeong Jiyong Park Dong-Un Lee
author_sort	Sung Won Choi
title	Photolysis and TiO<sub>2</sub> Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and Microorganisms
title_short	Photolysis and TiO<sub>2</sub> Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and Microorganisms
title_full	Photolysis and TiO<sub>2</sub> Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and Microorganisms
title_fullStr	Photolysis and TiO<sub>2</sub> Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and Microorganisms
title_full_unstemmed	Photolysis and TiO<sub>2</sub> Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and Microorganisms
title_sort	photolysis and tio<sub>2</sub> photocatalytic treatment under uvc/vuv irradiation for simultaneous degradation of pesticides and microorganisms
publisher	MDPI AG
series	Applied Sciences
issn	2076-3417
publishDate	2020-06-01
description	Efficiencies of various treatments for UVC photolysis (ultraviolet light-C at 254 nm), VUV photolysis (vacuum ultraviolet light at 254 nm and 185 nm), UVC-assisted titanium dioxide photocatalysis (UVC-TiO<sub>2</sub>), and VUV-assisted titanium dioxide photocatalysis (VUV-TiO<sub>2</sub>) were investigated for the degradation of pesticides including pyraclostrobin, boscalid, fludioxonil, and azoxystrobin and inactivation of microorganisms <i>Escherichia coli</i> K12 as a surrogate for <i>E. coli</i> O157:H7 and <i>Saccharomyces cerevisiae</i> in aqueous solutions and on the surface of fresh cut carrots. The degradation efficiencies of VUV were higher than for UVC on pesticides in aqueous solutions. However, there was no significant difference between degradation efficiencies for UVC and UVC-TiO<sub>2</sub> treatments, and between VUV and VUV-TiO<sub>2</sub> treatments. UVC, VUV, UVC-TiO<sub>2</sub>, and VUV-TiO<sub>2</sub> showed similar inactivation effects against <i>E. coli </i>K12 and <i>S. cerevisiae </i>in aqueous solutions. The combined use of UVC and VUV treatments (combined UV) and combined use of UVC-TiO<sub>2</sub> and VUV-TiO<sub>2</sub> treatments (combined UV-TiO<sub>2</sub>) showed higher efficiencies (72–94% removal) for the removal of residual pesticides on fresh cut carrots than bubble water washing (53–73% removal). However, there was no significant difference in removal efficiency between combined UV and combined UV-TiO<sub>2 </sub>treatments. For <i>E. coli</i> K12 and <i>S. cerevisiae</i> on fresh cut carrots, the combined UV-TiO<sub>2</sub> treatment (1.5 log and 1.6 log reduction, respectively) showed slightly higher inactivation effects than combined UV (1.3 log and 1.2 log reduction, respectively). Photolysis and TiO<sub>2</sub> photocatalytic treatments under UV irradiation, including VUV as a light source, showed potential for the simultaneous degradation of pesticides and microorganisms as a non-chemical and residue-free technique for surface disinfection of fresh produce.
topic	photolysis UVC VUV TiO2 photocatalysis pesticide microorganism
url	https://www.mdpi.com/2076-3417/10/13/4493
work_keys_str_mv	AT sungwonchoi photolysisandtiosub2subphotocatalytictreatmentunderuvcvuvirradiationforsimultaneousdegradationofpesticidesandmicroorganisms AT hafizmuhammadshahbaz photolysisandtiosub2subphotocatalytictreatmentunderuvcvuvirradiationforsimultaneousdegradationofpesticidesandmicroorganisms AT jeongunkim photolysisandtiosub2subphotocatalytictreatmentunderuvcvuvirradiationforsimultaneousdegradationofpesticidesandmicroorganisms AT dahyunkim photolysisandtiosub2subphotocatalytictreatmentunderuvcvuvirradiationforsimultaneousdegradationofpesticidesandmicroorganisms AT soheeyoon photolysisandtiosub2subphotocatalytictreatmentunderuvcvuvirradiationforsimultaneousdegradationofpesticidesandmicroorganisms AT sehojeong photolysisandtiosub2subphotocatalytictreatmentunderuvcvuvirradiationforsimultaneousdegradationofpesticidesandmicroorganisms AT jiyongpark photolysisandtiosub2subphotocatalytictreatmentunderuvcvuvirradiationforsimultaneousdegradationofpesticidesandmicroorganisms AT dongunlee photolysisandtiosub2subphotocatalytictreatmentunderuvcvuvirradiationforsimultaneousdegradationofpesticidesandmicroorganisms
_version_	1724606805100724224

Photolysis and TiO<sub>2</sub> Photocatalytic Treatment under UVC/VUV Irradiation for Simultaneous Degradation of Pesticides and Microorganisms

Similar Items