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Enhanced disinfection efficiency of mechanically mixed oxidants with free chlorine.
Water Res. 2005 Feb; 39(4):721-7.WR

Abstract

To the best of our knowledge, this study is the first investigation to be performed into the potential benefits of mechanically mixed disinfectants in controlling bacterial inactivation. The purpose of this study was to evaluate the disinfection efficiency of mechanically mixed oxidants with identical oxidant concentrations, which were made by adding small amounts of subsidiary oxidants, namely ozone (O3), chlorine dioxide (ClO2), hydrogen peroxide (H2O2) and chlorite (ClO2(-)), to free available chlorine (Cl2), using Bacillus subtilis spores as the indicator microorganisms. The mechanically mixed oxidants containing Cl2/O3, Cl2/ClO2 and Cl2/ClO2(-) showed enhanced efficiencies (of up to 52%) in comparison with Cl2 alone, whereas no significant difference was observed between the mixed oxidant, Cl2/H2O2, and Cl2 alone. This enhanced disinfection efficiency can be explained by the synergistic effect of the mixed oxidant itself and the effect of intermediates such as ClO2(-)/ClO2, which are generated from the reaction between an excess of Cl2 and a small amount of O3/ClO2(-). Overall, this study suggests that mechanically mixed oxidants incorporating excess chlorine can constitute a new and moderately efficient method of disinfection.

Authors+Show Affiliations

Son H
School of Chemical Engineering, College of Engineering, Seoul National University, San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, Republic of Korea.
Cho M
No affiliation info available
Kim J
No affiliation info available
Oh B
No affiliation info available
Chung H
No affiliation info available
Yoon J
No affiliation info available

MeSH

Bacillus subtilisCells, CulturedChloridesChlorineChlorine CompoundsDisinfectantsDisinfectionDrug SynergismHydrogen PeroxideOxidantsOxidesOzoneSpectrophotometry, UltravioletWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15707645

Citation

Son, Hyunju, et al. "Enhanced Disinfection Efficiency of Mechanically Mixed Oxidants With Free Chlorine." Water Research, vol. 39, no. 4, 2005, pp. 721-7.
Son H, Cho M, Kim J, et al. Enhanced disinfection efficiency of mechanically mixed oxidants with free chlorine. Water Res. 2005;39(4):721-7.
Son, H., Cho, M., Kim, J., Oh, B., Chung, H., & Yoon, J. (2005). Enhanced disinfection efficiency of mechanically mixed oxidants with free chlorine. Water Research, 39(4), 721-7.
Son H, et al. Enhanced Disinfection Efficiency of Mechanically Mixed Oxidants With Free Chlorine. Water Res. 2005;39(4):721-7. PubMed PMID: 15707645.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced disinfection efficiency of mechanically mixed oxidants with free chlorine. AU - Son,Hyunju, AU - Cho,Min, AU - Kim,Jaeeun, AU - Oh,Byungtaek, AU - Chung,Hyenmi, AU - Yoon,Jeyong, Y1 - 2004/12/23/ PY - 2004/06/19/received PY - 2004/10/13/revised PY - 2004/10/24/accepted PY - 2005/2/15/pubmed PY - 2005/7/20/medline PY - 2005/2/15/entrez SP - 721 EP - 7 JF - Water research JO - Water Res VL - 39 IS - 4 N2 - To the best of our knowledge, this study is the first investigation to be performed into the potential benefits of mechanically mixed disinfectants in controlling bacterial inactivation. The purpose of this study was to evaluate the disinfection efficiency of mechanically mixed oxidants with identical oxidant concentrations, which were made by adding small amounts of subsidiary oxidants, namely ozone (O3), chlorine dioxide (ClO2), hydrogen peroxide (H2O2) and chlorite (ClO2(-)), to free available chlorine (Cl2), using Bacillus subtilis spores as the indicator microorganisms. The mechanically mixed oxidants containing Cl2/O3, Cl2/ClO2 and Cl2/ClO2(-) showed enhanced efficiencies (of up to 52%) in comparison with Cl2 alone, whereas no significant difference was observed between the mixed oxidant, Cl2/H2O2, and Cl2 alone. This enhanced disinfection efficiency can be explained by the synergistic effect of the mixed oxidant itself and the effect of intermediates such as ClO2(-)/ClO2, which are generated from the reaction between an excess of Cl2 and a small amount of O3/ClO2(-). Overall, this study suggests that mechanically mixed oxidants incorporating excess chlorine can constitute a new and moderately efficient method of disinfection. SN - 0043-1354 UR - https://www.unboundmedicine.com/medline/citation/15707645/Enhanced_disinfection_efficiency_of_mechanically_mixed_oxidants_with_free_chlorine_ DB - PRIME DP - Unbound Medicine ER -