A study of the routes of contamination by lead and cadmium in Santo Amaro, Brazil

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The problem of contamination by cadmium and lead in Santo Amaro, Brazil has been studied since 1970, and the severity of this contamination case has been demonstrated by many authors. This study evaluates the persistence of the superficial soil contamination around the metallurgical plant and attempts to correlate the lead and cadmium concentrations to the past atmospheric emissions from the lead plant and with the presence of lead debris under urban road surface and in the backyards of homes. Past emissions still play an important role in soil contamination.