Concentrations of cadmium, lead and copper in atmospheric precipitation in Czechoslovakia.

The concentrations of Cd, Pb and Cu in wet and dry atmospheric precipitation were measured in 13 regions of Czechoslovakia. The Pb and Cd contents of rainwater were found to decrease with increasing rainfall intensity. The highest enrichment of Cd, Pb and Cu was observed in ice-accretion deposits; increasing amounts of metals were found at higher altitudes, i.e. 700-1000 m above sea level. The electrostatically separated fractions are rather high in Cu and Pb (approximately 90%), whereas Cd contributes less than 50%.