LOAD OF PB, CD, HG, BE AND CU WITH SEDIMENTING DUSTS IN THE CITY OF KARLSRUHE IN WINTER 1992 93 AUTUMN 1993 PERIOD - A SPATIAL AND TEMPORALVARIATION STUDY/

Total atmospheric fallout of Pb, Cd, Hg, Be, and Cu was determined in 3 quarters of Karlsruhe using the standard Bergerhoff method. Depositi on of the metals was evaluated and presented to study their spatial an d temporal changes. Average deposition of the metals in winter 1992/93 -autumn 1993 period amounted to: Pb 11, Cd 0.29, Hg 0.045, Be 0.055, a nd Cu 9.6 mu g d(-1) m(-2). The maximum spatial variations were found between 230% and 510%. The maximum temporal variations were between 17 0% and 1700% (1700% for Hg). The maximum spatial variations for all me tals, but Hg, were close to the corresponding maximum temporal variati ons. Pb and Cd depositions, at all 3 sampling sites, were found to be more than 10 times lower than the corresponding German control regulat ions. The deposition rates for other metals were close to those for th e background levels.