TY - JOUR
T1 - Thirdhand smoke
T2 - Heterogeneous oxidation of nicotine and secondary aerosol formation in the indoor environment
AU - Petrick, Lauren M.
AU - Svidovsky, Alona
AU - Dubowski, Yael
PY - 2011/1/1
Y1 - 2011/1/1
N2 - Tobacco smoking is well-known as a significant source of primary indoor air pollutants. However, only recently has thirdhand smoke (THS) been recognized as a contributor to indoor pollution due to the role of indoor surfaces. Here, the effects of relative humidity (<10% RH and ∼45% RH) and substrate (cellulose, cotton, and paper) on secondary organic aerosol (SOA) formation from nicotine-ozone-NOx reactions are discussed. SOA formation from the sorbed nicotine-ozone reaction ([O3] = 55 ppb) varied in size distribution and number, depending on RH and substrate type, indicating the role of substrate and water interactions in SOA formation. This led to SOA yields from cellulose sorbed nicotine-ozone reaction of ∼1 and 2% for wet and dry conditions, respectively. SOA formation from nicotine-NOx reactions was not distinguishable from background levels. Simultaneously, cellulose sorbed nicotine-ozone reaction kinetics ([O3] = 55 ppb) were obtained and revealed pseudofirst-order surface rate constants of k1 = (1 ± 0. 5) < 10-3 and k1 < 10-4 min -1 under <10% and ∼45% RH, respectively. Given the toxicity of some of the identified products and that small particles may contribute to adverse health effects, the present study indicates that exposure to THS ozonation products may pose additional health risks.
AB - Tobacco smoking is well-known as a significant source of primary indoor air pollutants. However, only recently has thirdhand smoke (THS) been recognized as a contributor to indoor pollution due to the role of indoor surfaces. Here, the effects of relative humidity (<10% RH and ∼45% RH) and substrate (cellulose, cotton, and paper) on secondary organic aerosol (SOA) formation from nicotine-ozone-NOx reactions are discussed. SOA formation from the sorbed nicotine-ozone reaction ([O3] = 55 ppb) varied in size distribution and number, depending on RH and substrate type, indicating the role of substrate and water interactions in SOA formation. This led to SOA yields from cellulose sorbed nicotine-ozone reaction of ∼1 and 2% for wet and dry conditions, respectively. SOA formation from nicotine-NOx reactions was not distinguishable from background levels. Simultaneously, cellulose sorbed nicotine-ozone reaction kinetics ([O3] = 55 ppb) were obtained and revealed pseudofirst-order surface rate constants of k1 = (1 ± 0. 5) < 10-3 and k1 < 10-4 min -1 under <10% and ∼45% RH, respectively. Given the toxicity of some of the identified products and that small particles may contribute to adverse health effects, the present study indicates that exposure to THS ozonation products may pose additional health risks.
UR - https://www.scopus.com/pages/publications/78650686282
U2 - 10.1021/es102060v
DO - 10.1021/es102060v
M3 - Article
C2 - 21141815
AN - SCOPUS:78650686282
SN - 0013-936X
VL - 45
SP - 328
EP - 333
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 1
ER -