Thirdhand smoke: Heterogeneous oxidation of nicotine and secondary aerosol formation in the indoor environment

Lauren M. Petrick, Alona Svidovsky, Yael Dubowski

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)328-333
Number of pages6
JournalEnvironmental Science and Technology
Volume45
Issue number1
DOIs
StatePublished - 1 Jan 2011

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Environmental Chemistry

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