Abstract
The effect of electrolyte concentration on the enrichment of Cr(VI) in droplets generated from bubbles bursting on the surface of chromic acid solution was investigated with an experimental bubbling system for CrO3 concentrations in the range of 31.25-375 g/L in the bulk solution with a gas flow rate of 4L/min. A cascade impactor collected droplet samples on polyvinyl chloride filters for chemical analysis. A laser aerosol spectrometer and an aerodynamic particle sizer were employed simultaneously to measure the number concentration and size distribution of the droplets. For the 5 electrolyte concentrations studied, the measured droplet size distributions had count median diameters (CMDs) in the range of 0.15-0.18 mu m. The droplet volume distributions calculated from droplet number concentration data were bimodal, indicating the presence of both film and jet droplets which had a mode at 3-4 mu m and over 10 mu m, respectively. As the CrO3 concentration in the bulk solution increased, the mode of the volu...
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