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Ozone chemistry in aqueous solution: ozone decomposition and stabilisation
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
2005 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

Ozone is used in many applications in the industry as an oxidising agent for example for bleaching and sterilisation. The decomposition of ozone in aqueous solutions is complex, and is affected by many properties such as, pH, temperature and substances present in the water. Additives can either accelerate the decomposition rate of ozone or have a stabilising effect of the ozone decay. By controlling the decomposition of ozone it is possible to increase the oxidative capacity of ozone.

In this work the chemistry of acidic aqueous ozone is studied and ways to stabilise the decomposition of ozone in such solutions. The main work emphasizes the possibility to use surfactants in order to develop a new type of cleaning systems for the sterilisation of medical equipment.

Place, publisher, year, edition, pages
Stockholm: KTH , 2005. , 37 p.
Series
Trita-OOK, ISSN 0348-825X ; 1078
Keyword [en]
Chemistry
Keyword [sv]
Kemi
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-303OAI: oai:DiVA.org:kth-303DiVA: diva2:8778
Presentation
2005-05-13, H1, Teknikringen 33, Stockholm, 10:30
Supervisors
Note
QC 20101126Available from: 2005-07-15 Created: 2005-07-15 Last updated: 2010-11-26Bibliographically approved
List of papers
1. Reaction of SDS with ozone and OH radicals in aqueous solution
Open this publication in new window or tab >>Reaction of SDS with ozone and OH radicals in aqueous solution
2007 (English)In: Ozone: Science & engineering, ISSN 0191-9512, E-ISSN 1547-6545, Vol. 29, no 2, 131-138 p.Article in journal (Refereed) Published
Abstract [en]

Ozone can be used as an antiseptic in cleaning systems. SDS (Sodium Dodecyl Sulfate) has proved to be a suitable surfactant in such systems. However, kinetic studies have showed that SDS reacts with ozone at high concentrations. In contrast, the natural decomposition of ozone to oxygen is retarded at low SDS concentrations. NMR spectroscopic analyses of SDS solutions being continuously treated with ozone and OH radicals, respectively, have been performed. H-1-, C-13-, COSY-, HMBC- and HSQC-NMR spectra were recorded showing that small carboxyl acids were formed at exposure to ozone. Randomly positioned carbonyl groups were also found along the hydrocarbon chain. However, the largest product was caused by direct reaction of SDS with ozone. The predominant product most likely is a SDS-peroxide. H-1-NMR spectra of the samples treated with OH radicals also show the formation of small carboxylic and carbonyl groups. However, there is no indication of oxidation of the sulphate group.

Keyword
ozone, Sodium Dodecyl Sulfate (SDS), peroxide, OH radical, oxidation, scavenger, decomposition
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-16627 (URN)10.1080/01919510601187053 (DOI)000246442800008 ()2-s2.0-34247328165 (Scopus ID)
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved
2. Bacteriological study of an aqueous solution with ozone and SDS or SDSperoxide
Open this publication in new window or tab >>Bacteriological study of an aqueous solution with ozone and SDS or SDSperoxide
2005 (English)In: Applied and Environmental Microbiology, ISSN 0099-2240, E-ISSN 1098-5336Article in journal (Other academic) Submitted
National Category
Other Basic Medicine
Identifiers
urn:nbn:se:kth:diva-26718 (URN)
Note

QS 2010 QS 20120319

Available from: 2010-11-26 Created: 2010-11-26 Last updated: 2017-12-12Bibliographically approved
3. Ozone decomposition in acidic solutions
Open this publication in new window or tab >>Ozone decomposition in acidic solutions
(English)Manuscript (preprint) (Other academic)
National Category
Other Basic Medicine
Identifiers
urn:nbn:se:kth:diva-26779 (URN)
Note
QC 20101126Available from: 2010-11-26 Created: 2010-11-26 Last updated: 2010-11-26Bibliographically approved

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CiteExportLink to record
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Citation style
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  • Other locale
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