Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16157
Title: Determining diffusion and partition coefficients of VOCs in cement using one FLEC
Authors: Luo, R
Niu, JL 
Keywords: ATD
Cement slab
Diffusion coefficient
GC-MSD
Inverse problem of mass diffusion
Mass diffusion
Partition coefficient
VOC
Issue Date: 2006
Publisher: Pergamon Press
Source: Building and environment, 2006, v. 41, no. 9, p. 1148-1160 How to cite?
Journal: Building and environment 
Abstract: The diffusion and partition coefficients of eight volatile organic compounds (VOCs) in cement slabs were experimentally determined using a field and laboratory emission cell (FLEC) system based on the method developed in a previous study on the water vapor diffusion. A cement slab planted with a mixture of eight VOCs was placed in an one-FLEC system to undergo the mass diffusion in the slab and the emission to air flowing through the FLEC. The concentration of each VOC in the air flowing out of the FLEC was measured according to the EPA Method TO-17 using sorbent tube-automatic thermal desorption (ATD) and the gas chromatography-mass spectrum detector (GC-MSD) system. The diffusion and partition coefficients were then obtained by solving the inverse problem of the one-dimensional unsteady mass diffusion equations in the cement slab. And, the partition coefficient was also obtained from the total mass transfer estimated from the VOC concentration measurements and air flowrate, which was equivalent to the headspace concentration-weighting method.
URI: http://hdl.handle.net/10397/16157
ISSN: 0360-1323
EISSN: 1873-684X
DOI: 10.1016/j.buildenv.2005.05.005
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