Determining diffusion and partition coefficients of VOCs in cement using one FLEC

R. Luo, Jianlei Niu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)1148-1160
Number of pages13
JournalBuilding and Environment
Volume41
Issue number9
DOIs
Publication statusPublished - 1 Sep 2006

Keywords

  • ATD
  • Cement slab
  • Diffusion coefficient
  • GC-MSD
  • Inverse problem of mass diffusion
  • Mass diffusion
  • Partition coefficient
  • VOC

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Building and Construction

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