Sorption chemistry of an environmental tobacco smoke (ETS) analog on indoor surfaces

COLL 273

Charles C. Chusuei, chusuei@umr.edu, Department of Chemistry, Missouri University of Science and Technology, 400 West 11th Street, 142 Schrenk Hall, Rolla, MO 65409-0010, Maneerat Ongwandee, Mahasarakham University, Kantarawichai District, Mahasarakham, 44150, Thailand, and Glenn C. Morrison, gcm@umr.edu, Department of Civil, Architectural, and Environmental Engineering, University of Missouri-Rolla, Rolla, 65409.
Sorptive interactions of environmental tobacco smoke (ETS) on indoor surfaces play a major role in inhalation exposure to volatile organic compounds (VOCs). Using ZrSiO4 and polyethylene (PE) to model mineral surfaces and carpeting, respectively, the sorptive behavior of gaseous trimethylamine (TMA), was examined under conditions of 80% relative humidity (RH) in N2 and in the presence of 1000 ppm CO2 or NH3. TMA adsorption and desorption behavior were studied using attenuated total reflection IR (ATR-IR) and X-ray photoelectron (XPS) spectroscopies. Spectral data revealed that TMA adsorbed on both surfaces in a protonated state. Stronger adsorption was observed to occur on ZrSiO4. XPS of the O 1s core level indicates that the "dry" ZrSiO4 surface retains OH groups available for bonding not present in PE, supporting earlier research showing that partition coefficients increase with decreasing RH.
 

The Physical Chemistry of Environmental Interfaces
6:00 PM-8:00 PM, Monday, April 7, 2008 Morial Convention Center -- Rm. 244/245, Poster

Division of Colloid & Surface Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008