Qualidade das águas superficiais e do solo e avaliação hidrogeológica na área do entorno do pool de combustíveis de Londrina - PR.

Abstract

Environmental contamination of groundwater and surface water due to a leak of diesel fuel has had special attention in recent studies. Oil products are a mixture mostly of hydrocarbons, which can be volatile. The compounds of gasoline which have a higher environmental importance are the monoaromatic benzene, toluene, ethylbenzene and the three xylene isomers known as BTEX. In the case of diesel stands out the polycyclic aromatic hydrocarbons (PAH 's). The objective of this study was to evaluate the soil contamination for oil in the vicinity of the Fuel Pool of Londrina and surface waters of the river Lindóia, in addition to conducting a survey of data from hydrogeological character for calculations of sense and flow velocity of ground water. It was performed a literature search for data collection of registered monitoring wells and the Surfer 8.0 software was used for the modeling of data and generation of maps. Were plotted maps containing the local water table, the lines of flow of underground water and potentiometric quota indicating the place where the groundwater emerges and contributes to the base flow of the stream. Regarding the contamination of the area there were colleceted seven samples of surface water from river Lindóia and five soil samples at pre-determined locations. An extraction with dichloromethane was taken on samples of water and soil. The extracts were analyzed in the laboratory spectrofluorometer LAFLURPE at Universidade Estadual de Londrina (UEL). It wasn’t found any presence of petroleum contaminants in water samples collected. However, in the soil samples 1, 2 and 4 there were found evidence of the presence of petroleum aromatics. The samples 1 and 2 showed mainly the presence of PAH. In the soil sample 4, there were found signs of BTEX, PAHs, polar aromatics and asphaltenes.