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Indoor and Built Environment, Vol. 9, No. 5, 277-283 (2000)
DOI: 10.1177/1420326X0000900505

Gravimetric Studies on VOC Adsorption by Indoor Materials under Near-Ambient Conditions

R. Meininghaus

Centre Scientifique et Technique du Bâtiment CSTB, Marne-la-Vallée, France

S. Kirchner

Centre Scientifique et Technique du Bâtiment CSTB, Marne-la-Vallée, France

F. Maupetit

Centre Scientifique et Technique du Bâtiment CSTB, Marne-la-Vallée, France

H. Sallée

Centre Scientifique et Technique du Bâtiment CSTB, Marne-la-Vallée, France

D. Quenard

Centre Scientifique et Technique du Bâtiment CSTB, Marne-la-Vallée, France

Adsorption and desorption of volatile organic com pounds (VOCs) by indoor materials can have a signifi cant impact on indoor air quality. Investigations with oth er environmental matrices than building materials have shown that the presence of water has a strong impact on VOC adsorption. The purpose of the present study was to develop and validate a microbalance set-up aimed at investigating VOC adsorption by indoor materials under controlled relative humidity at ambient pressure. The experimental set-up is described and the adsorption iso therms and partition coefficients obtained for combina tions of m-xylene and n-octane with several indoor mate rials are reported. Linear or almost linear adsorption iso therms were found for most combinations of com pounds and materials. n-Octane is in all cases less strongly adsorbed than m-xylene. Comparison with data originating from a different experimental technique gave acceptable agreement between the methods for most of the materials tested.

Key Words: Indoor air quality • Volatile organic compounds • Sink effect • Microbalance • Adsorption isotherms


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