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[ subject:"Environmental science." ]
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Nitrous Acid Cycling and Reaction on...
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Donaldson, Melissa.
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Nitrous Acid Cycling and Reaction on Soil Surfaces.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Nitrous Acid Cycling and Reaction on Soil Surfaces./
作者:
Donaldson, Melissa.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:
163 p.
附註:
Source: Dissertation Abstracts International, Volume: 78-09(E), Section: B.
Contained By:
Dissertation Abstracts International78-09B(E).
標題:
Environmental science. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10271254
ISBN:
9781369756524
Nitrous Acid Cycling and Reaction on Soil Surfaces.
Donaldson, Melissa.
Nitrous Acid Cycling and Reaction on Soil Surfaces.
- Ann Arbor : ProQuest Dissertations & Theses, 2017 - 163 p.
Source: Dissertation Abstracts International, Volume: 78-09(E), Section: B.
Thesis (Ph.D.)--Indiana University, 2017.
Nitrous acid (HONO) plays a significant role in regulating the oxidative capacity of the atmosphere and is a precursor to ozone, which is both a greenhouse gas and an EPA criteria pollutant harmful to human and environmental health. Despite extensive research over three decades, HONO formation and loss processes are not completely understood, and current atmospheric models do not accurately predict nighttime or daytime levels, but ground surfaces may explain some of these inconsistencies. Soil and soil-derived dust coats large areas of both rural and urban areas and, as such, represents an important surface for both the production and deposition of HONO. We hypothesize that soil is a significant source and sink of HONO and our aim has been to increase our understanding of the environmental parameters and the chemical mechanisms responsible. Our first study characterizes the uptake of atmospherically relevant concentrations of HONO on soil surfaces at varied relative humidity and relates those trends to the reactive soil surface as it transitions from what is predominantly a porous and dry mineral surface to one that is coated by thin water films. Our second study demonstrates that the surface acidity of boundary layer minerals, especially aluminum and iron (hydr)oxides, plays a critical role in the ability of a surface to release HONO or sequester it as nitrite (NO 2-) or the nitroacidium ion (H2ONO +). Our final study focuses on the chemical reactions of HONO with soil and humic substances to better understand the reactive sites and whether those reactions are irreversible or a temporary reservoir. The results significantly improve our understanding of the partitioning and fate of HONO and our ability to model its net flux from soil surfaces.
ISBN: 9781369756524Subjects--Topical Terms:
677245
Environmental science.
Nitrous Acid Cycling and Reaction on Soil Surfaces.
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Nitrous acid (HONO) plays a significant role in regulating the oxidative capacity of the atmosphere and is a precursor to ozone, which is both a greenhouse gas and an EPA criteria pollutant harmful to human and environmental health. Despite extensive research over three decades, HONO formation and loss processes are not completely understood, and current atmospheric models do not accurately predict nighttime or daytime levels, but ground surfaces may explain some of these inconsistencies. Soil and soil-derived dust coats large areas of both rural and urban areas and, as such, represents an important surface for both the production and deposition of HONO. We hypothesize that soil is a significant source and sink of HONO and our aim has been to increase our understanding of the environmental parameters and the chemical mechanisms responsible. Our first study characterizes the uptake of atmospherically relevant concentrations of HONO on soil surfaces at varied relative humidity and relates those trends to the reactive soil surface as it transitions from what is predominantly a porous and dry mineral surface to one that is coated by thin water films. Our second study demonstrates that the surface acidity of boundary layer minerals, especially aluminum and iron (hydr)oxides, plays a critical role in the ability of a surface to release HONO or sequester it as nitrite (NO 2-) or the nitroacidium ion (H2ONO +). Our final study focuses on the chemical reactions of HONO with soil and humic substances to better understand the reactive sites and whether those reactions are irreversible or a temporary reservoir. The results significantly improve our understanding of the partitioning and fate of HONO and our ability to model its net flux from soil surfaces.
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