Evaluation of the geochemical behavior of the soil from the llhabela (SP) landfill region

Abstract

This work presents the behavior of the soil of the Ilhabela landfill region (São Paulo – Brazil) under heavy metals presence in the garbage. It was carried out through a percolation column filled with the local non-impacted soil that was previously fractionated in smaller than 0.075 mm grain size particles and subjected to the artificial solution of lead (Pb) and nickel (Ni). Another portion of the soil (grain size smaller than 2.0 mm) was tested using the urban garbage leachate. For both tests the leachate used was collected at the Aterro São João – São Paulo. The results of the adsorption tests showed that the heavy metals were more concentrated in the soil particles smaller than 0.075 mm than in the smaller than 2.0 mm grain size. The results allowed to conclude that the studied material, which is classified as a silty sand soil, where is located the domestic garbage dump of the Ilhabela region, is unsuitable for an efficient retention of heavy metalspresent in contaminated leachates.