Descontaminação de embalagens descartadas de clorpirifós utilizando o processo de oxidação avançada por radiação ionizante / Decontamination of used pesticide packaging using advanced oxidation process by ionizing radiation

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The discharge of empty plastic packaging of pesticides can be an environmental concern causing problems to human health, animals and plants if done without inspection and monitoring. Among the commercial pesticides, chlorpyrifos has significant importance because of its wide distribution and extensive use and persistence. The hydroxil OH atack is the most efficient process of chemical oxidation. The radiation-induced degradation of chlorpyfifos in liquid samples and in polyethylene pack was studied by gamma-radiolysis. Packaging of high density polyethylene tree layer coextruded, named COEX, and water samples contaminated with chlorpyrifos, were irradiated using both, a multipurpose Co-60 gamma irradiator and a gamma source with 5,000 Ci total activity, Gammacell type. The chemical analysis of the chlorpirifos and by-products were made using a gas chromatography associated to the mass spectrometry. Gamma radiation was efficient for removing chlorpyrifós from the plastic packaging in all studied cases.

ASSUNTO(S)

decontamination of pesticide packaging descontaminação de embalagens oxidation process ionizing radiation clorpirifós radiação ionizante

ACESSO AO ARTIGO

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