EFFICACITÉ DU TRAITEMENT PAR UN PROCÉDÉ D’INFILTRATION-PERCOLATION DES LIXIVIATS DE LA DÉCHARGE NON CONTRÔLÉE DE LA VILLE DE TAZA, VIA L’ÉVALUATION DE LA PHYTOTOXICITÉ.

Abstract

In Morocco, the leachates present a real danger, since they are a threat to public health, and cause degradation of the quality of the environment and natural resources. This research aims to evaluate the efficiency of leachate treatment by an infiltration-percolation process through evaluation of phytotoxicity of filtrates from the treatment process.

Treatment with infiltration-percolation is based on a filtration of leachate on a fine granular medium. This process has reduced the pollution load of leachates, represented by discoloration, which varies from a filtrate to another depending on the type of adsorbent used.

The evaluation of phytotoxicity after treatment has shown an inhibition of germination for high concentrations 50% and 30% of the filtrates obtained by media: Juniperus phoenicea L. Sawdust, Cedrus Atlantica sawdust, Arundo donax L. roots sawdust, coal slag, clay soil, beach sand, Oued sand and also for multi-strata columns. This indicates the presence of toxic elements remaining after treatment. A decrease of phytotoxicity was observed for the filtrates media: Juniperus phoenicea L.  Sawdust, Cedrus Atlantica sawdust, coal slag, clay soil, beach sand and Oued sand at concentrations 10 % and 5%.