Remediação de sitios contaminados atraves da extração de vapores do solo

AUTOR(ES)
DATA DE PUBLICAÇÃO

1991

RESUMO

The Soil Vapor Extraction (EVS) is a technique frequently applied in the remediation of contaminated vadose zones by volatile compounds such as gasoline and chlorinated organic solvents, as well as on the gas migration, as methane for example. The procedure consists on creating apressure gradient in the soil, inducing preferencial flow of gases and vapours. This work presents the gas flow equations in the porous media and compares the corresponding results against established groundwater flow. The soil phase equilibrium equations are analysed under the light of the controlling factors over EVS. A simplified model describing vapour extraction is developed from those basic equations. Assuming homogeneous soil and instantaneous equilibrium amongst phases, the presently proposed model also takes into account the effects brought about by the presence of co-solvents. Finally, the relevance of some parameters such as organic carbon fraction, soil humidity and co-solvent fraction are analysed under one typical application case... Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

engenharia civil solos aguas subterraneas umidade dos

ACESSO AO ARTIGO

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