Determination of partition and diffusion coefficient of formaldehyde in selected building materials and impact of relative humidity

Jing Xu, Jianshun S. Zhang, Xiaoyu Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The partition and effective diffusion coefficients of formaldehyde were measured for three materials (conventional gypsum wallboard, "green" gypsum wallboard, and "green" carpet) under three relative humidity (RH) conditions (20%, 50% and 70% RH). A dynamic dualchamber test method was used. Results showed that a higher relative humidity led to a larger effective diffusion coefficient for both conventional wallboard and green wallboard. The partition coefficient (Kma) of formaldehyde in conventional wallboard was larger at 50% RH than at 20% RH, while the difference in Kma between 50% RH and 70% RH was insignificant. The partition coefficient of formaldehyde did not show significant change in green wallboard, but it increased slightly with the increase of relative humidity in carpet. The carpet was also found to be very permeable resulting in a diffusion coefficient at the same level as the formaldehyde diffusion coefficient in air. The data generated could be used to assess the sorption effects of formaldehyde on building materials and to evaluate its impact on the formaldehyde concentration in buildings.

Original languageEnglish (US)
Title of host publication12th International Conference on Indoor Air Quality and Climate 2011
Pages1779-1784
Number of pages6
StatePublished - Dec 1 2011
Event12th International Conference on Indoor Air Quality and Climate 2011 - Austin, TX, United States
Duration: Jun 5 2011Jun 10 2011

Publication series

Name12th International Conference on Indoor Air Quality and Climate 2011
Volume3

Other

Other12th International Conference on Indoor Air Quality and Climate 2011
CountryUnited States
CityAustin, TX
Period6/5/116/10/11

Keywords

  • Diffusion coefficient
  • Dynamic dual chamber
  • Formaldehyde
  • Partition coefficient
  • Relative humidity

ASJC Scopus subject areas

  • Pollution

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  • Cite this

    Xu, J., Zhang, J. S., & Liu, X. (2011). Determination of partition and diffusion coefficient of formaldehyde in selected building materials and impact of relative humidity. In 12th International Conference on Indoor Air Quality and Climate 2011 (pp. 1779-1784). (12th International Conference on Indoor Air Quality and Climate 2011; Vol. 3).