Deposition of Particulate Emissions from a Smelter Industry

摘要

A mathematical model is developed for calculating the deposition of heavy metals (Pb, Cu, Cd) from a smelter complex situated in the northern Sweden. The model is based on the Gaussian plume dispersion model with reflection at ground and inversion layer. The plume reduction is taken into account by a surface depletion model. The deposition is calculated for 4 emission sources (3 stacks and wind erosion), 3 heavy metals (Pb, Cu, Cd), 3 particle sizes, 8 directions, 4 lapse rates, 5 windspeeds, winter situations and summer situations. The calculations are worked out for distances up to 70 km from the smelter complex. Within this distance, on the average, 60% of the emission is deposited. Of this deposition about 10% is wet deposition, i.e., scavenging by rain or snow. (ERA citation 05:022913)