Avaliação da contaminação por chumbo na vizinhança de uma indústria de baterias automotivas no município de Londrina - Pr

Abstract

The evaluation of sites likely to suffer lead contamination is of really importance due to its non-degradability and bioaccumulation potential. The exposure in contaminated areas can generate evidenced harmful effects to the health of organisms. The present work aimed to evaluate lead contamination in the vicinity of a automotive batteries industry, in Londrina - PR. This is an area of high human exposure, occupied by residences, agricultural crops, university and shopping centers, within a radius of less than 500 m. Analysis of the total lead concentrations were performed with ICP-OES technique. Sampling plans and collection of soil were performed considering the prevailing winds and local topography; also collection of surface water and groundwater sources. Over 70% of the soil samples in the industry area of influence exceeded the value of prevention for total lead of CONAMA Resolution No. 420/2009, of 72 mg kg-1, while the highest value observed was above of 770 mg kg -1. The soil of the region, according to the amount of organic matter, presence of clay and cation exchange capacity, presented conditions that may favor the retention of lead. Observed values of lead above permitted by CONAMA Resolution n ° 396/2008 to surface water downstream from the company warehouse. The Capivara Stream, assessed in this work, was anthropized for parameters of pH and electrical conductivity, which can make the lead, already present in the environment, more available in the water. The study area presents contamination, and may be related to the presence of the battery industry due to high levels of lead in the vicinity of the company.