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Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO(2)(–)) on Common Indoor Material Surfaces

[Image: see text] Nitrous acid (HONO) is a household pollutant exhibiting adverse health effects and a major source of indoor OH radicals under a variety of lighting conditions. The present study focuses on gas-phase HONO and condensed-phase nitrite and nitrate formation on indoor surface thin films...

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Autores principales: Pandit, Shubhrangshu, Grassian, Vicki H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9454260/
https://www.ncbi.nlm.nih.gov/pubmed/36001734
http://dx.doi.org/10.1021/acs.est.2c02042
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author Pandit, Shubhrangshu
Grassian, Vicki H.
author_facet Pandit, Shubhrangshu
Grassian, Vicki H.
author_sort Pandit, Shubhrangshu
collection PubMed
description [Image: see text] Nitrous acid (HONO) is a household pollutant exhibiting adverse health effects and a major source of indoor OH radicals under a variety of lighting conditions. The present study focuses on gas-phase HONO and condensed-phase nitrite and nitrate formation on indoor surface thin films following heterogeneous hydrolysis of NO(2), in the presence and absence of light, and nitrate (NO(3)(–)) photochemistry. These thin films are composed of common building materials including zeolite, kaolinite, painted walls, and cement. Gas-phase HONO is measured using an incoherent broadband cavity-enhanced ultraviolet absorption spectrometer (IBBCEAS), whereby condensed-phase products, adsorbed nitrite and nitrate, are quantified using ion chromatography. All of the surface materials used in this study can store nitrogen oxides as nitrate, but only thin films of zeolite and cement can act as condensed-phase nitrite reservoirs. For both the photo-enhanced heterogeneous hydrolysis of NO(2) and nitrate photochemistry, the amount of HONO produced depends on the material surface. For zeolite and cement, little HONO is produced, whereas HONO is the major product from kaolinite and painted wall surfaces. An important result of this study is that surface interactions of adsorbed nitrite are key to HONO formation, and the stronger the interaction of nitrite with the surface, the less gas-phase HONO produced.
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spelling pubmed-94542602022-09-09 Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO(2)(–)) on Common Indoor Material Surfaces Pandit, Shubhrangshu Grassian, Vicki H. Environ Sci Technol [Image: see text] Nitrous acid (HONO) is a household pollutant exhibiting adverse health effects and a major source of indoor OH radicals under a variety of lighting conditions. The present study focuses on gas-phase HONO and condensed-phase nitrite and nitrate formation on indoor surface thin films following heterogeneous hydrolysis of NO(2), in the presence and absence of light, and nitrate (NO(3)(–)) photochemistry. These thin films are composed of common building materials including zeolite, kaolinite, painted walls, and cement. Gas-phase HONO is measured using an incoherent broadband cavity-enhanced ultraviolet absorption spectrometer (IBBCEAS), whereby condensed-phase products, adsorbed nitrite and nitrate, are quantified using ion chromatography. All of the surface materials used in this study can store nitrogen oxides as nitrate, but only thin films of zeolite and cement can act as condensed-phase nitrite reservoirs. For both the photo-enhanced heterogeneous hydrolysis of NO(2) and nitrate photochemistry, the amount of HONO produced depends on the material surface. For zeolite and cement, little HONO is produced, whereas HONO is the major product from kaolinite and painted wall surfaces. An important result of this study is that surface interactions of adsorbed nitrite are key to HONO formation, and the stronger the interaction of nitrite with the surface, the less gas-phase HONO produced. American Chemical Society 2022-08-24 2022-09-06 /pmc/articles/PMC9454260/ /pubmed/36001734 http://dx.doi.org/10.1021/acs.est.2c02042 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Pandit, Shubhrangshu
Grassian, Vicki H.
Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO(2)(–)) on Common Indoor Material Surfaces
title Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO(2)(–)) on Common Indoor Material Surfaces
title_full Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO(2)(–)) on Common Indoor Material Surfaces
title_fullStr Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO(2)(–)) on Common Indoor Material Surfaces
title_full_unstemmed Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO(2)(–)) on Common Indoor Material Surfaces
title_short Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO(2)(–)) on Common Indoor Material Surfaces
title_sort gas-phase nitrous acid (hono) is controlled by surface interactions of adsorbed nitrite (no(2)(–)) on common indoor material surfaces
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9454260/
https://www.ncbi.nlm.nih.gov/pubmed/36001734
http://dx.doi.org/10.1021/acs.est.2c02042
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