Dynamic Behavior of Semivolatile Organic Compounds in Indoor Air. 2. Nicotine and Phenanthrene with Carpet and Wallboard

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• 作者：Michael D. Van Loy ; William J. Riley ; Joan M. Daisey ; and William W. Nazaroff
• 刊名：Environmental Science & Technology
• 出版年：2001
• 出版时间：February 1, 2001
• 年：2001
• 卷：35
• 期：3
• 页码：560 - 567
• 全文大小：114K
• 年卷期：v.35,no.3(February 1, 2001)
• ISSN：1520-5851

文摘

The surface interactions of nicotine and phenanthrenewith carpet, painted wallboard, and stainless steel wereinvestigated in a room-sized environmental test chamber.Adsorption kinetics were tested by flash evaporating aknown mass of each compound into a sealed 20 m³ chambercontaining one or more of the tested sorbents. In eachexperiment, one or more emissions were performed afterthe gas-phase concentration had reached an apparentplateau. At the end of each experiment, the chamber wasventilated and resealed to monitor reemission of thecompound from the sorbents. Kinetic sorption parameterswere determined by fitting a mass-balance model to theexperimental results. The sorption capacity of stainless steelwas of similar magnitude for nicotine and phenanthrene.Sorption of nicotine on carpet and wallboard was muchstronger, with equilibrium partitioning values 2-3 orders ofmagnitude higher. The sorption capacities of phenanthreneon carpet and wallboard were smaller, approximately 10-20% of the stainless steel values. The rates of uptake areof similar magnitude for all sorbate-sorbent pairs andare consistent with the limit imposed by gas-phase boundary-layer mass transport. The rates of desorption are muchfaster for phenanthrene than for nicotine. Model simulationspredict average nicotine levels in a typical smokingresidence that are consistent with published data.