Determination of transport parameters for heavy metal in residual compacted soil using two methodologies

• Autor(a) principal: Azevedo, Izabel Christina Duarte
• Data de Publicação: 2006
• Outros Autores: Nascentes, Cleidimar Rejane, Matos, Antonio Teixeira de, Azevedo, Roberto Francisco de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://dx.doi.org/10.1139/L06-038; http://www.locus.ufv.br/handle/123456789/23588
• topic: Heavy metals; Column test; Cumulative mass method; Metaux lourds; Essai en colonne; Methode de la masse cumulative

Values of the hydrodynamic dispersion coefficient and retardation factor obtained using the traditional and cumulative mass methods of column test analysis for zinc, manganese, and cadmium in a compacted soil are compared. The soil under study is from the B horizon of a residual gneissic tropical soil used for construction of the liner for the sanitary landfill in the District of Visconde do Rio Branco, Minas Gerais (MG), Brazil. To evaluate the behavior of landfill leachate heavy metals through the soil, soil column tests were performed on samples of compacted soil. A computational program that uses an optimization procedure to generate values of the hydrodynamic dispersion coefficient and retardation factor was developed to facilitate interpretation of the results obtained by the cumulative mass method. Values of the retardation factor and hydrodynamic dispersion coefficient were not influenced by the method of determination, even when a reduced number of effluent samples was used by the cumulative mass method. The use of the cumulative mass method, based on a reduced number of pore volumes, reduces the time and cost involved in the tests.