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Indoor Photochemical Radical Product...

Kowal, Shawn Finley.

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Indoor Photochemical Radical Production: Wavelength-resolved Photon Fluxes and Rate Calculations.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Indoor Photochemical Radical Production: Wavelength-resolved Photon Fluxes and Rate Calculations./
Author:	Kowal, Shawn Finley.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	146 p.
Notes:	Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
Contained By:	Dissertation Abstracts International79-11B(E).
Subject:	Atmospheric chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10747918
ISBN:	9780438102095

Indoor Photochemical Radical Production: Wavelength-resolved Photon Fluxes and Rate Calculations.
Kowal, Shawn Finley.

Indoor Photochemical Radical Production: Wavelength-resolved Photon Fluxes and Rate Calculations. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 146 p.

Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.

Thesis (Ph.D.)--Syracuse University, 2018.

Photochemical reactions indoors have largely been ignored due to an assumed lack of high energy photons. We have measured wavelength-resolved photon fluxes of several indoor light sources (various standard consumer lightbulbs, fluorescent tubes, and sunlight). Light was detected in the actinic region (wavelengths < 400 nm) for the majority of these sources. Measured photon fluxes were used to calculate production rates of hydroxyl (OH) and peroxy (HO2) radicals (collectively referred to as HOx) from the photolysis of trace compounds found indoors. Our results indicate that most light sources indoors can initiate photolysis of compounds indoors. However, under ambient conditions, only the photolysis of nitrous acid (HONO) by sunlight and the photolysis of formaldehyde (HCHO) by fluorescent tubes will contribute significantly to HOx concentrations indoors.

ISBN: 9780438102095Subjects--Topical Terms:

544140
Atmospheric chemistry.

Indoor Photochemical Radical Production: Wavelength-resolved Photon Fluxes and Rate Calculations.
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245 1 0 $a Indoor Photochemical Radical Production: Wavelength-resolved Photon Fluxes and Rate Calculations.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 146 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
500 $a Adviser: Tara F. Kahan.
502 $a Thesis (Ph.D.)--Syracuse University, 2018.
520 $a Photochemical reactions indoors have largely been ignored due to an assumed lack of high energy photons. We have measured wavelength-resolved photon fluxes of several indoor light sources (various standard consumer lightbulbs, fluorescent tubes, and sunlight). Light was detected in the actinic region (wavelengths < 400 nm) for the majority of these sources. Measured photon fluxes were used to calculate production rates of hydroxyl (OH) and peroxy (HO2) radicals (collectively referred to as HOx) from the photolysis of trace compounds found indoors. Our results indicate that most light sources indoors can initiate photolysis of compounds indoors. However, under ambient conditions, only the photolysis of nitrous acid (HONO) by sunlight and the photolysis of formaldehyde (HCHO) by fluorescent tubes will contribute significantly to HOx concentrations indoors.
520 $a We extended our calculations of indoor radical production rates to evaluate a potentially unforeseen risk with hospital decontamination processes. More advanced cleaning techniques, developed for the elimination of harmful pathogens, utilize photolabile compounds. Some of the chemicals can photolyze to form HOx or chlorine radicals (Cl). We determined that radical concentrations may be orders of magnitude higher than background levels after the use of these cleaning processes. This could lead to lowered air quality within the room where disinfection occurred and cause adverse health effects for occupants.
520 $a The few photon flux measurements performed indoors have been done under a limited range of conditions. We present the first photon fluxes from inside a residence and two consumer vehicles, along with measurements in an academic building. We evaluated the influence of several factors on indoor photon fluxes from sunlight. We predicted OH production rates from HONO photolysis indoors under different illumination conditions to assess the importance of photochemistry on indoor air composition. OH production rates are likely to be relatively high under a number of conditions indoors.
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650 4 $a Atmospheric chemistry. $3 544140
650 4 $a Chemistry. $3 516420
650 4 $a Environmental studies. $3 2122803
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710 2 $a Syracuse University. $b Chemistry. $3 3428706
773 0 $t Dissertation Abstracts International $g 79-11B(E).
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793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10747918