Investigação de contaminação por necrochorume em uma área rural do município de Três Cachoeiras-RS

Abstract

The problem involving cemeteries is due to their potential source of contamination, since since antiquity the practice of disposing of bodies in soil has been used, and still occurs today, often inappropriately, both by the means chosen and the technique. used. Contamination by necrochorume (a viscous gray-brown liquid with an acrid and fetid odor) that comes out of the tombs carries various organic and inorganic components, in addition to pathogenic organisms. Necroleach occurs through the percolation of liquid into the soil, which can be retained in the soil if it is more clayey, or infiltrate into the deeper layers of the soil, reaching the water table and generating plumes of contamination in aquifers, thus contaminating the water, if it is more sandy. This study aimed to investigate whether there is soil contamination by necrochorume in a rural cemetery in the municipality of Três Cachoeiras. With the results obtained from the chemical and physical analyzes carried out, it was possible to determine that there is contamination of the cemetery by the elements Cadmium, Chromium and Molybdenum in accordance with the concentrations of prevention required by law (CONAMA 420/2009). There were no values that characterize contamination of the copper element. The elements Aluminum and Iron are found in large quantities in the soil due to the geological formation of the region. The type of burial influenced the potential for soil pollution by heavy metals. It was not possible to analyze the two main compounds present in necrochorume, which are skull and putrescine.