Atmospheric heavy metal deposition plumes adjacent to a primary lead-zinc smelter.

摘要: A method for the determination of atmospheric heavy metal deposition rates has been developed using 0.5-m2 trays at 0.1 m from ground. Trays were spaced 150-m intervals along a 1500-m line 500 east Pb-Zn smelter. Ten sampling events 1-3-h duration conducted under westerly wind conditions so as to determine sources metals deposited near Deposited materials sampled wipes. There was good agreement between placed side-by-side and exposed in pairs. Under certain conditions, however, is not appropriate owing potential local contamination. Geometric mean Pb, Zn, Fe, Cu, As Cd averaged over nominal plume width 600 amounted 18.8, 22.2, 12.2, 0.614, 0.403 0.052 mg m-2 day-1, respectively. Gaussian profiles seen downwind blast furnace, sinter plant, refinery area. Zinc could also be attributed northern Zn production This site generally associated with elevated Pb deposition. On basis this work, residential areas adjoining smelter likely occur site, increasing speed. The strategic measurement dry-deposition short periods time large collection surfaces provides source-specific information obtainable by conventional long-term 'passive' sampling. Lower detection limits than those achieved here are non-smelter settings. Previous suggestions implicating sink city surface dusts probable source recontamination settings absence ongoing emissions supported work.