Deposition and Resuspension of Particles: Which Parameters are Important?

A new experimental set-up to investigate the physical process of dust deposition and resuspension on and from surfaces is introduced. Dust deposition can reduce the airborne dust concentration considerably. As a basis for developing methods to eliminate dust related problems in rooms, there is a need for better understanding of the mechanism of dust deposition and resuspension. With the presented experimental set-up the dust load on surfaces in a channel can be measured as a function of the environmental and surface conditions and the type of particles under controlled laboratory conditions. Results of a first series of measurements are shown. It is found that the surface orientation is the parameter which influences the dust load most. The measurements indicate that the air velocity has a non-linear influence and that high turbulence causes high dust load.