Concentração residual de hexaclorociclohexano em área contaminada na Cidade dos Meninos, Duque de Caxias, Rio de Janeiro, Brasil, após tratamento com óxido de cálcio

• Autor(a) principal: Oliveira, Rosália Maria de
• Data de Publicação: 2003
• Outros Autores: Bastos, Lúcia Helena Pinto, Dias, Ana Elisa Xavier de Oliveira e, Silva, Sérgio Alves da, Moreira, Josino Costa
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Cadernos de Saúde Pública
• Texto Completo: https://cadernos.ensp.fiocruz.br/ojs/index.php/csp/article/view/2132
• topic: Hexaclorociclohexano; Contaminação; Solo; Carcinógenos; Descontaminação

Hexachlorocyclohexanes (HCHs) are currently considered potentially carcinogenic to humans. In Brasil, severe soil contamination by HCHs has been identified at Cidade dos Meninos, Duque de Caxias, Rio de Janeiro, where an old HCH factory was abandoned 40 years ago, leaving 1,700 local residents at risk. Calcium oxide treatment was performed on the most heavily contaminated (focus) area. Analysis of superficial soil samples collected years after treatment still showed high residual HCH. Contamination levels as high as 6,200mg/Kg and 7,320mg/Kg were found for alpha- and beta-HCH isomers. For the gamma- and delta-HCH isomers, concentrations reached up to 140mg/Kg and 530mg/Kg, respectively. The results showed that calcium oxide treatment was not efficient to decontaminate the soil in this area.