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	Determining diffusion and partition coefficients of VOCs in cement using one FLEC
	Luo, R ; Niu, JL
	2010-05-11 ; 2010-05-11
关键词	mass diffusion inverse problem of mass diffusion VOC diffusion coefficient partition coefficient GC-MSD ATD cement slab VOLATILE ORGANIC-COMPOUNDS LABORATORY EMISSION CELL WET COATING MATERIALS BUILDING-MATERIALS MASS-TRANSFER FIELD MODEL FLOW Construction & Building Technology Engineering, Environmental Engineering, Civil
中文摘要	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. (C) 2005 Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/25812]
专题	清华大学
推荐引用方式 GB/T 7714	Luo, R,Niu, JL. Determining diffusion and partition coefficients of VOCs in cement using one FLEC[J],2010, 2010.
APA	Luo, R,&Niu, JL.(2010).Determining diffusion and partition coefficients of VOCs in cement using one FLEC..
MLA	Luo, R,et al."Determining diffusion and partition coefficients of VOCs in cement using one FLEC".(2010).

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