Pollution d'eaux de ruissellement par les metaux lourds en zone urbaine. Premiere partie: Metal total

Abstract

The metallic content (Cd, Cu, Pb, Zn) of urban runoff waters has been studied after phase separation by 0,45 μm filtration, as well as global parameters. Sequential sampling has been performed during seven important rainfalls in a single residential area in 1991 and 1992. A minor first flush effect has been noted. The better part of the metallic pollutants was in the particulates at quite high concentrations (Cd 5 μg g^‐1; Cu 400 μg g^‐1; Pb 700 μg g^‐1 and Zn 2000 μg g^‐1). A study of the multiparameter correlations evidenced strong links between COD, BODg, Suspended Solids and Cu and Pb concentrations in the particulate phase. Conductivity was not correlated to any parameter.

Keywords:

• Heavy metals
• storm water
• pollution
• urban area