From the World Health Organization’s, WHO
[26] annual and 24 hour mean air quality standard for
PM10, the dust particle concentration must not exceed an
annual mean of 20μg/m3 and a 24-hour mean of 50μg/m3.
Considering this, a model which relates the particulate
collection efficiency and the concentration of the dust
particle entering the scrubber (dust laden) and the WHO
[26] air quality standard concentration was used. This is
described by (18):