Assessment of the genotoxic activity of treated sludge from São Paulo sewage treatment plants with the micronuclei assay in germ cells of Tradescantia (Trad-MN) / Avaliação da atividade genotóxica de lodo de esgosto tratado do Estado de São Paulo com o teste de micronúcleo em células germinativas de Tradescantia (Trad-MN)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The sludge produced in sewage treatment plants can contain toxic substances which are not yet regulated by national and international legislation. Among these, the genotoxic substances are of great concern. The present paper aimed at evaluating the genotoxicity of treated sludge samples collected in different Sewage Treatment Plants (STP) located in the State of São Paul, Brazil. The micronucleus assay in Tradescantia was the test chosen for this evaluation. Another objective of the study was to verify it Tradescantia pallida could replace the clone 4430 in the Trad-MN assay. All the STPs studied have presented at least one positive sample for the micronucleus assay in the Tradescantia. Further studies are required in order to determine which compounds are responsible for the observed effect. The results obtained suggest that T. pallida can replace clone 4430 in the micronucleus assay, however, this assay presents limited applicability in monitoring programs.

ASSUNTO(S)

lodo sewage teste de micronúcleos tradescantia Águas residuárias disposiçaõ final de lodos micronuclei assay fatores de risco sludge tradescantia sludge final disposal genotoxicity risk factors esgoto genotoxicidade

ACESSO AO ARTIGO

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