Design and Development of a Novel PM Inertial Impactor With Reduced Particle Bounce Off

Abstract

Air quality engineers carry out air sampling for monitoring the air pollutants, finding key sources of pollutants and assessing the health risk associated with them. Inertial impactors are simple devices based on impaction theory and useful for size specific collection of aerosol particles. Inertial impactors have one major problem of particle bounce off which perturbs its accuracy and collection efficiency. This problem is non-predictable and increases with longer sampling period. It is also pronounced with increased pollution level. This present study presents design and development of a novel inertia  impactor having an off-centric impaction nozzle as a solution to reduce particle bounce off.