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A chemical dynamic model for the infiltration of outdoor size‐resolved ammonium nitrate aerosols to indoor environments
Author(s) -
Xie Yangyang,
Zhao Bin
Publication year - 2020
Publication title -
indoor air
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.387
H-Index - 99
eISSN - 1600-0668
pISSN - 0905-6947
DOI - 10.1111/ina.12629
Subject(s) - ammonium nitrate , nitrate , aerosol , relative humidity , ammonia , environmental chemistry , environmental science , ammonium , infiltration (hvac) , nitric acid , deposition (geology) , chemistry , penetration (warfare) , environmental chamber , atmospheric sciences , meteorology , materials science , inorganic chemistry , composite material , paleontology , organic chemistry , operations research , sediment , engineering , biology , geology , physics
In the present study, we developed a chemical dynamic model to describe the infiltration of size‐resolved ammonium nitrate aerosols from outdoor to indoor environments. This model considered the penetration factor, deposition rate, and the reversible reaction process, which was quantified by the diffusive molar flux on the surface of ammonium nitrate aerosols depending on indoor temperature, humidity, and concentrations of nitric acid (HNO 3 ) and ammonia (NH 3 ). To verify the model, we employed a single‐particle aerosol mass spectrometer with an automated switching system to simultaneously measure size‐resolved outdoor and indoor ammonium nitrate aerosols. Comparisons between the predicted and measured concentrations of these aerosols showed a mean relative error of 4.8 ± 18.3%. To analyze the sensitivity of model parameters, several parameters were perturbed. This analysis indicated that parameters related to HNO 3 were more sensitive than those related to NH 3 because the indoor gas phase concentration of NH 3 was much higher than that of HNO 3 .