[en] Removal of charged aerosols from the atmosphere and indoor environments is investigated numerically. Calculations are performed on charged aerosol deposition assuming realistic charge distributions. Effects of ion asymmetry and number concentration of aerosols are investigated using numerical models and the ion asymmetry is found to have a significant effect on aerosol deposition. Deposition calculations are extended to charged distributions typical of radioactive aerosols. Electrical effects on deposition of radioactive aerosols are found to depend principally on the radioactive aerosol's decay rate and number concentration. Scavenging is a mechanism for aerosol removal near clouds. Numerical methods are developed to quantify the scavenging removal of radioactive aerosols when their charging is significant. Electrical image forces are found to be important. Charging of radioactive aerosols is found to have significant effects on their collision efficiency. The collision efficiency depends on their charge, and therefore the aerosol's decay rate and number concentration, but it does not depend on the charge carried by water drops. Scavenging coefficients are calculated for radioactive aerosols, which are known to carry appreciable charges. The collision efficiency calculations are extended to collection of contact ice nuclei by supercooled droplets in clouds. It is found that the sensitivity of collision efficiency to modest charges on aerosol particles is sufficient to increase freezing rates of droplets by contact nucleation, and is shown to be comparable with temperature-dependent changes in freezing properties typically found in the atmosphere. (author)