Formation of indoor nitrous acid (HONO) by light-induced NO2 heterogeneous reactions with white wall paint
| Autor: | Matthias Sörgel, Elena Gómez Alvarez, Etienne Quivet, Andreas Held, Cornelius Zetzsch, Adrien Gandolfo, Rafal Strekowski, Sasho Gligorovski, Vincent Bartolomei, Henri Wortham |
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| Přispěvatelé: | Laboratoire Chimie de l'environnement (LCE), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2014 |
| Předmět: |
Light
010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Nitrogen Dioxide Analytical chemistry Nitrous Acid 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Adsorption Paint [CHIM]Chemical Sciences Environmental Chemistry Relative humidity 0105 earth and related environmental sciences [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Nitrous acid Environmental engineering Water Gaseous nitrogen General Medicine Pollution Gas stoves Light intensity chemistry 13. Climate action Air Pollution Indoor Yield (chemistry) Housing Light induced |
| Zdroj: | Environmental Science and Pollution Research Environmental Science and Pollution Research, Springer Verlag, 2014, 21 (15), pp.9259-9269. ⟨10.1007/s11356-014-2836-5⟩ Environmental Science and Pollution Research, 2014, 21 (15), pp.9259-9269. ⟨10.1007/s11356-014-2836-5⟩ |
| ISSN: | 1614-7499 0944-1344 |
| Popis: | International audience; Gaseous nitrogen dioxide (NO2) represents an oxidant that is present in relatively high concentrations in various indoor settings. Remarkably increased NO2 levels up to 1.5 ppm are associated with homes using gas stoves. The heterogeneous reactions of NO2 with adsorbed water on surfaces lead to the generation of nitrous acid (HONO). Here, we present a HONO source induced by heterogeneous reactions of NO2 with selected indoor paint surfaces in the presence of light (300 nm < lambda < 400 nm). We demonstrate that the formation of HONO is much more pronounced at elevated relative humidity. In the presence of light (5.5 W m(-2)), an increase of HONO production rate of up to 8.6 . 10(9) molecules cm(-2) s(-1) was observed at [NO2] = 60 ppb and 50 % relative humidity (RH). At higher light intensity of 10.6 (W m(-2)), the HONO production rate increased to 2.1 . 10(10) molecules cm(-2) s(-1). A high NO2 to HONO conversion yield of up to 84 % was observed. This result strongly suggests that a light-driven process of indoor HONO production is operational. This work highlights the potential of paint surfaces to generate HONO within indoor environments by light-induced NO2 heterogeneous reactions. |
| Databáze: | OpenAIRE |
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