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Full-Text Articles in Physical Sciences and Mathematics
Interactions Of Hydrogen Peroxide And Oxalic Acid On Ice Films, Hui Yan
Interactions Of Hydrogen Peroxide And Oxalic Acid On Ice Films, Hui Yan
Legacy Theses & Dissertations (2009 - 2024)
The heterogeneous halogen chemistry plays a critical role in the ozone depletion events in the polar boundary layers. Pathways involving the conversion from photochemically active halogens to photochemically inactive halogens are necessary to understand the nature of ozone depletion, but the processes are not fully understood. The study of the effects of hydrogen peroxide (H2O2) and oxalic acid (C2H2
Distributions And Sources Of Hono In The Rural Troposphere, Ning Zhang
Distributions And Sources Of Hono In The Rural Troposphere, Ning Zhang
Legacy Theses & Dissertations (2009 - 2024)
Nitrous acid (HONO) is an important precursor of hydroxyl radical and plays an important role in the terrestrial boundary layer photochemistry. However, there are still many unknowns regarding HONO chemistry such as formation mechanisms and distributions in the troposphere, especially in rural and remote environments. In this research, we presented the first vertical concentration profiles of HONO in the troposphere, measured on a small aircraft platform. The HONO mixing ratios ranged from 4 to 17 pptv in the free troposphere and from 8 to 74 pptv in the rural boundary layer. The HONO distribution patterns were strongly correlated to the …
Significance Of Hno3 Acid Photolysis On Surfaces In Tropospheric Chemistry, Honglian Gao
Significance Of Hno3 Acid Photolysis On Surfaces In Tropospheric Chemistry, Honglian Gao
Legacy Theses & Dissertations (2009 - 2024)
The reactive nitrogen trace gases (NOy) including nitrogen oxides (NOx) and their secondary products are known to cause ground-level ozone pollution, photochemical smog, acid deposition, and overall air quality degradation. NOx was believed to be permanently removed from the atmospheric by HNO3 formation and deposition. However, our laboratory experimental results show that HNO3 can be remobilized back to photochemically labile HONO and NOx (re-NOx-ification). We have verified and quantified HONO and NOx production from the photolysis of HNO3 on various surfaces, including Pyrex, leaves of plants, and other environmentally relevant …