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Air Quality Implications from Oxidat...

Link, Michael F.

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Air Quality Implications from Oxidation of Anthropogenic and Biogenic Precursors in The Troposphere.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Air Quality Implications from Oxidation of Anthropogenic and Biogenic Precursors in The Troposphere./
作者:	Link, Michael F.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	260 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-09, Section: B.
Contained By:	Dissertations Abstracts International81-09B.
標題:	Analytical chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27547331
ISBN:	9781392709917

Air Quality Implications from Oxidation of Anthropogenic and Biogenic Precursors in The Troposphere.
Link, Michael F.

Air Quality Implications from Oxidation of Anthropogenic and Biogenic Precursors in The Troposphere. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 260 p.

Source: Dissertations Abstracts International, Volume: 81-09, Section: B.

Thesis (Ph.D.)--Colorado State University, 2019.

This item must not be sold to any third party vendors.

Oxidation chemistry in the troposphere drives the formation of air pollutants, harmful to human health and the natural world. Emissions from both anthropogenic and biogenic sources control the ways in which air pollution is formed and thus understanding the chemistry of the oxidation of these emissions enhances our ability to predict how air quality evolves in the future. Experiments simulating tropospheric oxidation chemistry on anthropogenic point sources show that identifying unique chemical processes resulting in air pollution allow for a greater specificity in how to pursue strategies for pollution mitigation policy with regional and hemispheric implications. This thesis focuses on the implementation of advancements in instrumentation and experimental techniques to understand how tropospheric oxidation of anthropogenic and biogenic precursors can produce air pollution.First, we subject vehicle exhaust to simulated tropospheric oxidation and quantify the formation of particulate matter and a toxic gas, isocyanic acid. We estimate how important oxidation of vehicle emissions are for these atmospheric pollutants for the South Coast Air Basin of California and the Seoul Metropolitan Region. Second, we investigate the propensity for isoprene to produce formic and acetic acid in laboratory oxidation experiments. We find that isoprene is likely a major source of formic acid in biogenically-influenced environments, however the exact mechanisms for formation remain unclear. Lastly, we use chemical ionization mass spectrometer measurements to quantify the fraction of oxidized carbon allocated to gas-phase organic acids from isoprene oxidation in laboratory experiments. Through comparison with field measurements from a forest in Alabama to a forest in Colorado we determine high levels of isoprene in Alabama are responsible for high levels of organic acids compared to Colorado. We also observe that influences of anthropogenic NOx suppress the formation of gas-phase organic acids suggesting as NOx levels decrease throughout the US in the future organic acids produced from oxidation from isoprene are likely to increase.

ISBN: 9781392709917Subjects--Topical Terms:

3168300
Analytical chemistry.
Subjects--Index Terms:

Air pollution

Air Quality Implications from Oxidation of Anthropogenic and Biogenic Precursors in The Troposphere.
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520 $a Oxidation chemistry in the troposphere drives the formation of air pollutants, harmful to human health and the natural world. Emissions from both anthropogenic and biogenic sources control the ways in which air pollution is formed and thus understanding the chemistry of the oxidation of these emissions enhances our ability to predict how air quality evolves in the future. Experiments simulating tropospheric oxidation chemistry on anthropogenic point sources show that identifying unique chemical processes resulting in air pollution allow for a greater specificity in how to pursue strategies for pollution mitigation policy with regional and hemispheric implications. This thesis focuses on the implementation of advancements in instrumentation and experimental techniques to understand how tropospheric oxidation of anthropogenic and biogenic precursors can produce air pollution.First, we subject vehicle exhaust to simulated tropospheric oxidation and quantify the formation of particulate matter and a toxic gas, isocyanic acid. We estimate how important oxidation of vehicle emissions are for these atmospheric pollutants for the South Coast Air Basin of California and the Seoul Metropolitan Region. Second, we investigate the propensity for isoprene to produce formic and acetic acid in laboratory oxidation experiments. We find that isoprene is likely a major source of formic acid in biogenically-influenced environments, however the exact mechanisms for formation remain unclear. Lastly, we use chemical ionization mass spectrometer measurements to quantify the fraction of oxidized carbon allocated to gas-phase organic acids from isoprene oxidation in laboratory experiments. Through comparison with field measurements from a forest in Alabama to a forest in Colorado we determine high levels of isoprene in Alabama are responsible for high levels of organic acids compared to Colorado. We also observe that influences of anthropogenic NOx suppress the formation of gas-phase organic acids suggesting as NOx levels decrease throughout the US in the future organic acids produced from oxidation from isoprene are likely to increase.
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