Abstract : The transfer to groundwater of emerging substances from a former landfill in urban areas has been studied as part of a research program dealing with the observation and the monitoring of the environment. Of the 261 substances sought (30 pharmaceutical molecules, 223 phytosanitary products and 8 other emerging substances), 11 pharmaceutical molecules in particular have been quantified in the leachates, 2 endocrine disruptors (bisphenol A and triclosan) and 10 phytosanitary substances. Most of these substances are found in groundwater immediately downstream of the site (including carbamazepine) at concentrations ranging between 0.1 µg/l and 10 µg/l. The number of detected substances appears much smaller a few hundred meters far from the landfill (bisphenol A and diclofenac in particularly, with concentrations ranging from 0.1 to 1 µg/l and about 0.1 µg/l respectively). Natural attenuation occurs during transfer in the plume, as observed for PAHs or metals. The results show the interest of long-term hydrogeological and chemical monitoring. These are essential to the description of transfer processes of emerging substances.
Cécile Le Guern, Béatrice Bechet, Alexandra Lepinay, Pierre Conil. Occurrence and fate of emerging pollutants in groundwater from a municipal landfill. AQUACONSOIL 2017, Jun 2017, LYON, France. ⟨hal-01535139⟩