umu.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
The effect of mechanical ventilation systems on the chemistry in the supply air
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Ekologi och geovetenskap.
Visa övriga samt affilieringar
(Engelska)Artikel i tidskrift (Refereegranskat) Submitted
Nationell ämneskategori
Kemi
Identifikatorer
URN: urn:nbn:se:umu:diva-5654OAI: oai:DiVA.org:umu-5654DiVA, id: diva2:145240
Tillgänglig från: 2003-09-10 Skapad: 2003-09-10 Senast uppdaterad: 2018-06-09Bibliografiskt granskad
Ingår i avhandling
1. Chemical reactions in ventilation systems: Ozonolysis of monoterpenes
Öppna denna publikation i ny flik eller fönster >>Chemical reactions in ventilation systems: Ozonolysis of monoterpenes
2003 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Chemicals in indoor air, either emitted from a source or from a reaction, have been suggested to cause ill health in buildings. However, no clear correlations between exposure and health effects have been made.

In this thesis we studied the reaction between monoterpenes, a group of biogenic unsaturated C10 hydrocarbons, and ozone. Ozonolysis of monoterpenes was used as model reactions for unsaturated compounds in ambient air. Also the products formed from these reactions have been suggested as important participants in the occurrence of discomfort and ill health in buildings.

To enable a reliable and sensitive measurement of ppb-ppt levels of monoterpenes and the formed products in the presence of ozone an evaluation of available scrubber materials was made. Potassium iodide was shown to remove ambient levels of ozone and have a recovery of >95% for all monoterpenes and formed products included in the investigation.

Experimental conditions showed to have a large impact on the initial steps of the ozonolysis, and also on the composition of the formed products. We showed that water plays an important and complex role both in the initial stage of ozonolysis of ∆3-carene and in the formation and composition of products from the ozonolysis of ∆-pinene. The use of experimental design facilitated the evaluation of the investigated reactions. We showed that the formation of OH radicals could be studied using multiple linear regression models and that the presence or absence of OH radicals had a profound impact on the formation of many of the formed products. We also made an observation of the lack of formed OH radicals in the ozonolysis of limonene and discussed probable causes of this observation.

Despite the short reaction times and the ambient levels of ozone and monoterpenes used in our experiments we showed that a number of oxidation products were formed, and that the reaction rate is significantly increased in a ventilation system. This formation is underestimated by theoretical calculations and leads to high amounts of known irritants in the indoor air. We showed that theoretical calculations underestimate the formation of these oxidation products 3-13 times, depending on ventilation system and monoterpene.

Ort, förlag, år, upplaga, sidor
Umeå: Umeå universitet, 2003. s. 61
Nyckelord
Environmental chemistry, Monoterpene, Ozone, OH Radical, Ozonolysis, Ventilation, Potassium Iodide, Experimental Design, Heat Exchanger, Miljökemi
Nationell ämneskategori
Miljövetenskap
Identifikatorer
urn:nbn:se:umu:diva-97 (URN)91-7305-511-5 (ISBN)
Disputation
2003-10-03, KB3B1, KBC, Umeå, 13:00
Opponent
Handledare
Tillgänglig från: 2003-09-10 Skapad: 2003-09-10 Senast uppdaterad: 2018-06-09Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Personposter BETA

Fick, JerkerPommer, LindaAndersson, Barbro

Sök vidare i DiVA

Av författaren/redaktören
Fick, JerkerPommer, LindaAndersson, Barbro
Av organisationen
Kemiska institutionenEkologi och geovetenskap
Kemi

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 145 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf