A. Micallef et al., THE INFLUENCE OF HUMAN ACTIVITY ON THE VERTICAL-DISTRIBUTION OF AIRBORNE PARTICLE CONCENTRATION IN CONFINED ENVIRONMENTS - PRELIMINARY-RESULTS, Indoor air, 8(2), 1998, pp. 131-136
Citations number
7
Categorie Soggetti
Construcion & Building Technology","Engineering, Civil
Vertical concentration profiles for various size fractions of airborne
particulate matter have been measured in a nonsmoking indoor environm
ent used mainly as a meeting point during coffee break (11.00 a.m.) an
d tea time (4.00 p.m.). This monitoring exercise was carried out using
a novel sampling system specifically designed for measuring concentra
tion gradients of airborne particles (but which can be easily modified
for gaseous pollutants) over the first three metres from ground. The
results show substantial gradients in concentration, with the highest
occurring at around 1.3 m height. A plausible explanation for the meas
ured time series of concentration at different levels from ground, and
the vertical distribution of concentration, is thought to be human mo
vement and activity in the confined environment. The implications that
the results of this experiment have for indoor air quality standards
for airborne particulate matter are discussed. (C) Indoor Air (1998).