Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores

The protozoan parasites such as Cryptosporidiumparvum and Giardialamblia have been recognized as a frequent cause of recent waterborne disease outbreaks because of their strong resistance against chlorine disinfection. In this study, ozone and Fe(VI) (i.e., FeO(4)(2-)) were compared in terms of inac...

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Main Authors:	Makky, Essam A., Park, Gui-Su, Choi, Ik-Won, Cho, Sung-Il, Kim, Hyunook
Format:	Article
Language:	English
Published:	Elsevier 2011
Subjects:	QR Microbiology
Online Access:	http://umpir.ump.edu.my/id/eprint/5258/ http://umpir.ump.edu.my/id/eprint/5258/ http://umpir.ump.edu.my/id/eprint/5258/ http://umpir.ump.edu.my/id/eprint/5258/1/Chemosphere_2011.pdf

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recordtype	eprints
spelling	ump-52582018-01-09T08:06:32Z http://umpir.ump.edu.my/id/eprint/5258/ Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores Makky, Essam A. Park, Gui-Su Choi, Ik-Won Cho, Sung-Il Kim, Hyunook QR Microbiology The protozoan parasites such as Cryptosporidiumparvum and Giardialamblia have been recognized as a frequent cause of recent waterborne disease outbreaks because of their strong resistance against chlorine disinfection. In this study, ozone and Fe(VI) (i.e., FeO(4)(2-)) were compared in terms of inactivation efficiency for Bacillus subtilis spores which are commonly utilized as an indicator of protozoan pathogens. Both oxidants highly depended on water pH and temperature in the spore inactivation. Since redox potential of Fe(VI) is almost the same as that of ozone, spore inactivation efficiency of Fe(VI) was expected to be similar with that of ozone. However, it was found that ozone was definitely superior over Fe(VI): at pH 7 and 20°C, ozone with the product of concentration×contact time (C¯T) of 10mgL(-1)min inactivate the spores more than 99.9% within 10min, while Fe(VI) with C¯T of 30mgL(-1) min could inactivate 90% spores. The large difference between ozone and Fe(VI) in spore inactivation was attributed mainly to Fe(III) produced from Fe(VI) decomposition at the spore coat layer which might coagulate spores and make it difficult for free Fe(VI) to attack live spores. Elsevier 2011 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/5258/1/Chemosphere_2011.pdf Makky, Essam A. and Park, Gui-Su and Choi, Ik-Won and Cho, Sung-Il and Kim, Hyunook (2011) Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores. Chemosphere, 83 (9). pp. 1228-1233. ISSN 0045-6535 http://dx.doi.org/10.1016/j.chemosphere.2011.03.030 DOI: 10.1016/j.chemosphere.2011.03.030
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	QR Microbiology
spellingShingle	QR Microbiology Makky, Essam A. Park, Gui-Su Choi, Ik-Won Cho, Sung-Il Kim, Hyunook Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores
description	The protozoan parasites such as Cryptosporidiumparvum and Giardialamblia have been recognized as a frequent cause of recent waterborne disease outbreaks because of their strong resistance against chlorine disinfection. In this study, ozone and Fe(VI) (i.e., FeO(4)(2-)) were compared in terms of inactivation efficiency for Bacillus subtilis spores which are commonly utilized as an indicator of protozoan pathogens. Both oxidants highly depended on water pH and temperature in the spore inactivation. Since redox potential of Fe(VI) is almost the same as that of ozone, spore inactivation efficiency of Fe(VI) was expected to be similar with that of ozone. However, it was found that ozone was definitely superior over Fe(VI): at pH 7 and 20°C, ozone with the product of concentration×contact time (C¯T) of 10mgL(-1)min inactivate the spores more than 99.9% within 10min, while Fe(VI) with C¯T of 30mgL(-1) min could inactivate 90% spores. The large difference between ozone and Fe(VI) in spore inactivation was attributed mainly to Fe(III) produced from Fe(VI) decomposition at the spore coat layer which might coagulate spores and make it difficult for free Fe(VI) to attack live spores.
format	Article
author	Makky, Essam A. Park, Gui-Su Choi, Ik-Won Cho, Sung-Il Kim, Hyunook
author_facet	Makky, Essam A. Park, Gui-Su Choi, Ik-Won Cho, Sung-Il Kim, Hyunook
author_sort	Makky, Essam A.
title	Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores
title_short	Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores
title_full	Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores
title_fullStr	Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores
title_full_unstemmed	Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores
title_sort	comparison of fe(vi) (feo4(2-)) and ozone in inactivating bacillus subtilis spores
publisher	Elsevier
publishDate	2011
url	http://umpir.ump.edu.my/id/eprint/5258/ http://umpir.ump.edu.my/id/eprint/5258/ http://umpir.ump.edu.my/id/eprint/5258/ http://umpir.ump.edu.my/id/eprint/5258/1/Chemosphere_2011.pdf
first_indexed	2023-09-18T22:00:30Z
last_indexed	2023-09-18T22:00:30Z
_version_	1777414366094688256

Comparison of Fe(VI) (FeO4(2-)) and Ozone in Inactivating Bacillus Subtilis Spores

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