Pollution metallique relargable par les aerosols d'origine autoroutiere

Laurent Lebreton (1) , Daniel R. Thevenot (1, 2)

1 LABAM - Laboratoire de Bioélectrochimie et Analyse du Milieu
2 CEREVE - Centre d'Enseignement et de Recherche Eau Ville Environnement

Because they are highly contaminated by heavy metals, road aerosols may pollute runoff waters. To estimate the mobility of some toxic metals such as Zn, Pb or Cd, these aerosols have been submited to a range of sequential chemical extraction (chemical speciation) and to laboratory release experiments. Both chemical speciation and reactor experiments show similar metal behaviour. Zn and Cd are extremely mobile (60 % released) while Pb, highly bound to particles, needs a change of ionic strength, pH or the presence of chelating agents (addition of NaCl, pH 4 buffer or N.T.A. respectively) to dissolve significantly.

Domaines: Chimie; Chimie analytique; Sciences de l'environnement; Environnement et Société

Laurent Lebreton, Daniel R. Thevenot. Pollution metallique relargable par les aerosols d'origine autoroutiere. Environmental Technology, 1992, 13, pp.35 - 44. ⟨10.1080/09593339209385126⟩. ⟨hal-01200588⟩