Predicting the Emission Rate of Volatile Organic Compounds from Vinyl Flooring
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- 作者：Steven S. Cox ; John C. Little ; and Alfred T. Hodgson
- 刊名：Environmental Science & Technology
- 出版年：2002
- 出版时间：February 15, 2002
- 年：2002
- 卷：36
- 期：4
- 页码：709 - 714
- 全文大小：98K
- 年卷期：v.36,no.4(February 15, 2002)
- ISSN：1520-5851
文摘
A model for predicting the rate at which a volatileorganic compound (VOC) is emitted from a diffusion-controlled material is validated for three contaminants(n-pentadecane, n-tetradecane, and phenol) found invinyl flooring (VF). Model parameters are the initial VOCconcentration in the material phase (C0), the material/airpartition coefficient (K), and the material-phase diffusioncoefficient (D). The model was verified by comparing predictedgas-phase concentrations to data obtained during small-scale chamber tests and by comparing predicted material-phase concentrations to those measured at the conclusionof the chamber tests. Chamber tests were conductedwith the VF placed top-side-up and bottom-side-up. Withthe exception of phenol and within the limits of experimentalprecision, the mass of VOCs recovered in the gas-phasebalances the mass emitted from the material phase. Themodel parameters (C0, K, and D) were measured usingprocedures completely independent of the chamber test.Gas- and material-phase predictions compare well to thebottom-side-up chamber data. The lower emission ratesfor the top-side-up orientation may be explained bythe presence of a low-permeability surface layer. Thesink effect of the stainless steel chamber surface was shownto be negligible.