TY - JOUR
T1 - Influence of Candle Emissions on Monoterpene Oxidation Chemistry and Secondary Organic Aerosol
AU - Wang, Kai
AU - Rasmussen, Berit Brøndum
AU - Thomsen, Ditte
AU - Zhang, Yun
AU - Jensen, Mads Mørk
AU - Kristensen, Kasper
AU - Hoffmann, Thorsten
AU - Glasius, Marianne
AU - Bilde, Merete
PY - 2024/12/3
Y1 - 2024/12/3
N2 - Candle burning is a considerable contributor to indoor pollutants, while secondary organic aerosols (SOA) from monoterpene ozonolysis represent another type. However, knowledge of the interactions of different indoor pollutants is limited. We investigated physicochemical properties of SOA generated from typical indoor chemistry of the O
3/α-pinene reaction with and without the presence of particles and gases from a burning candle. Ozonolysis of α-pinene in the presence of candle gaseous emissions yielded a considerably lower particle number, larger particle sizes, and lower particle oxygen-to-carbon ratio compared with experiments without candle emissions. More nitrogen-containing organic compounds were observed in the aerosol phase with candle emissions. Furthermore, concentrations of some typical particle-phase products from the O
3/α-pinene reaction (i.e., terebic acid,
cis-pinic acid, and 3-methyl-1,2,3-butanetricarboxylic acid) were less abundant in the presence of candle emissions. The predicted volatility of particulate organic compounds was higher in experiments with candle emissions. The study demonstrates that candle burning can affect the chemical and physical properties of particles formed from other sources (e.g., α-pinene ozonolysis) by affecting gas-phase chemistry and gas-particle partitioning.
AB - Candle burning is a considerable contributor to indoor pollutants, while secondary organic aerosols (SOA) from monoterpene ozonolysis represent another type. However, knowledge of the interactions of different indoor pollutants is limited. We investigated physicochemical properties of SOA generated from typical indoor chemistry of the O
3/α-pinene reaction with and without the presence of particles and gases from a burning candle. Ozonolysis of α-pinene in the presence of candle gaseous emissions yielded a considerably lower particle number, larger particle sizes, and lower particle oxygen-to-carbon ratio compared with experiments without candle emissions. More nitrogen-containing organic compounds were observed in the aerosol phase with candle emissions. Furthermore, concentrations of some typical particle-phase products from the O
3/α-pinene reaction (i.e., terebic acid,
cis-pinic acid, and 3-methyl-1,2,3-butanetricarboxylic acid) were less abundant in the presence of candle emissions. The predicted volatility of particulate organic compounds was higher in experiments with candle emissions. The study demonstrates that candle burning can affect the chemical and physical properties of particles formed from other sources (e.g., α-pinene ozonolysis) by affecting gas-phase chemistry and gas-particle partitioning.
KW - candle emission
KW - chemical composition
KW - indoor air pollutants
KW - particle formation
KW - α-pinene ozonolysis
UR - http://www.scopus.com/inward/record.url?scp=85209713947&partnerID=8YFLogxK
U2 - 10.1021/acs.est.4c04075
DO - 10.1021/acs.est.4c04075
M3 - Journal article
C2 - 39555975
SN - 0013-936X
VL - 58
SP - 21265
EP - 21274
JO - Environmental Science & Technology
JF - Environmental Science & Technology
IS - 48
ER -