A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Identification and measurement of nitrous acid in an indoor environment
Abstract We report here direct observation by differential optical absorption spectroscopy (DOAS) of the formation of ppb levels of gaseous nitrous acid (MONO) from the reaction of ppm levels of nitrogen dioxide (NO2) with water vapor, in an indoor environment. The rate of formation of HONO displayed first order kinetics with respect to NO2 with a rate of (0.25 ±0.04) ppb min−1 per ppm of NO2 present. Assuming a lifetime of l h with respect to both physical and chemical removal processes for HONO, this leads to an estimated steady state concentration of ~ 15 ppb of HONO per ppm of NO2 present. This relatively high level of HONO associated with NO2-air mixtures raises new questions concerning the health implications of elevated NO2 concentrations in indoor environments e.g. HONO is a respirable nitrite known to convert secondary amines in vitro to carcinogenic nitrosamines.
Identification and measurement of nitrous acid in an indoor environment
Abstract We report here direct observation by differential optical absorption spectroscopy (DOAS) of the formation of ppb levels of gaseous nitrous acid (MONO) from the reaction of ppm levels of nitrogen dioxide (NO2) with water vapor, in an indoor environment. The rate of formation of HONO displayed first order kinetics with respect to NO2 with a rate of (0.25 ±0.04) ppb min−1 per ppm of NO2 present. Assuming a lifetime of l h with respect to both physical and chemical removal processes for HONO, this leads to an estimated steady state concentration of ~ 15 ppb of HONO per ppm of NO2 present. This relatively high level of HONO associated with NO2-air mixtures raises new questions concerning the health implications of elevated NO2 concentrations in indoor environments e.g. HONO is a respirable nitrite known to convert secondary amines in vitro to carcinogenic nitrosamines.
Identification and measurement of nitrous acid in an indoor environment
Pttts, James N. Jr. (author) / Wallington, Timothy J. (author) / Biermann, Heinz W. (author) / Winer, Arthur M. (author)
Atmospheric Environment ; 19 ; 763-767
1984-10-17
5 pages
Article (Journal)
Electronic Resource
English
Indoor heterogeneous photochemistry of furfural drives emissions of nitrous acid
| Wiley | 2021
Nitrous Acid Interference with Passive NO2 Measurement Methods and the Impact on Indoor NO2 Data
| Wiley | 2001
INDOOR ENVIRONMENT CONTROL DEVICE AND INDOOR ENVIRONMENT CONTROL METHOD
| European Patent Office | 2017