Collection of hydrophilic and hydrophobic charged submicron particles by charged water droplets

Droplet Charging for Wet Scrubbers

“…Prem and Pilat 7 reported particle collection efficiencies for single charged drops numerically calculated (Runga-Kutta) including inertial impaction, Brownian diffusion, and electrostatic forces. Experimental measurements of the single-drop particle collection efficiency have been reported by Wang et al 8 with single 137-500-m-diameter monodisperse drops (moving at their terminal gravity settling velocity and with electrically neutral surroundings) charged to ϳ10 Ϫ12 coulomb/drop collecting 0.2-m-diameter aerosol particles charged to opposite polarity are in general agreement with Kraemer's single-drop particle collection efficiency equation. The overall particle collection efficiency overall of a spray droplet wet scrubber can be calculated using the equation reported by Kleinschmidt 9 and shown here…”

Particle Deposition on Spheres by Inertial and Electrostatic Forces

“…Since uranine was chosen as the tracer, the amount of the particle mass collected either on the filters or on the balls was detected by fluorescence spectroscopy (Perkin-Elmer, MPF-44B), with a detection limit of 0.05 pg/liter (Wang, 1982). The fluorescence of uranine in water shows a strong dependence on pH for pH < 9, whereas no dependence is observed for pH > 9 (Wohlers et al, 1959).…”

Charged Particle Collection by an Oppositely Charged Accelerating Droplet

“…for insulation purposes. The droplet size was determined microscopically by collecting the droplets in a dish filled with castor oil and examining under a microscope (Wang, 1982).…”