title: Geophysical technique and groundwater monitoring to detect leachate contamination in the surrounding area of a landfill--Londrina (PR--Brazil).
abstract: The aim of the present study was to define leachate plume by using two techniques: geophysical and groundwater sampling in order to evaluate groundwater contamination. After performing a topographic survey and using geophysics, the leachate plume was identified. With this data, the wells for groundwater monitoring were located. Groundwater samples were analyzed for: COD, BOD, pH, alkalinity, conductivity, TKN and heavy metals. Through the electroresistivity method it was possible to define the shape of plume contamination. This method was important to locate the groundwater monitoring wells. The results of the physicochemical parameters showed the suitability of the geophysical study. The highest values of electric conductivity and alkalinity correspond to the wells located in the area interpreted as contaminated by leachate in the map of the resistivity. Even with seasonal variations, BOD values are low if compared to Brazilian environmental regulations, but COD values are higher up to 40 times the values of BOD. The concentrations of Ni, Zn, Cd and Cu in the groundwater are below the limits established by the potable water quality standards in Brazil, except for Pb whose concentration in groundwater were higher if compared to Brazilian legislation.
authors: Centro de Tecnologia e Urbanismo da Universidade Estadual de Londrina, Postal 6001, Campus Universitário, 86051-990 Londrina, PR, Brazil. dilopes@uel.br
authors: Deize Dias
authors: DD
authors: Lopes
authors: Sandra M C P
authors: SM
authors: Silva
authors: Fernandes
authors: F
authors: Fernandes
authors: Raquel S
authors: RS
authors: Teixeira
authors: André
authors: A
authors: Celligoi
authors: Luiz Henrique
authors: LH
authors: Dall'Antônia
mesh_terms: D001938:Brazil; D004784:Environmental Monitoring / Q000379:methods*; D060587:Groundwater / Q000032:analysis*; D012037:Refuse Disposal / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical