Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/23588
Tipo: Artigo
Título: Determination of transport parameters for heavy metal in residual compacted soil using two methodologies
Autor(es): Azevedo, Izabel Christina Duarte
Nascentes, Cleidimar Rejane
Matos, Antonio Teixeira de
Azevedo, Roberto Francisco de
Abstract: 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.
Le coefficient de dispersion hydrodynamique et les valeurs [R.sub.f], obtenus par les methodes de masse cumulative et traditionnelle de l'analyse des essais en colonne, pour le zinc, le manganese et le cadmium dans un sol compacte ont ete compares. Le sol a l'etude provient de l'horizon B d'un sol tropical gneissique residuel. Ce sol est utilize pour revetir un site d'enfouissement sanitaire a Visconde do Rio Branco, MG, Bresil. Afin d'evaluer le comportement du lixiviat de metaux lourds du site dans le sol, des essais en colonne de sol ont ete realises avec des echantillons de sol compacte. Un programme de calcul utilisant une procedure d'optimisation pour generer le coefficient de dispersion hydrodynamique et les valeurs [R.sub.f] a ete developpe afin de faciliter l'interpretation des resultats obtenus par la methode de masse cumulative. La methode de determination n'a pas influence les valeurs [R.sub.f] et du coefficient de dispersion hydrodynamique meme lorsque la methode de la masse cumulative n'utilisait qu'un nombre reduit d'echantillons de l'effluent. L'utilisation de la methode de la masse cumulative, basee sur un nombre reduit de volume de pores, a reduit le temps et les couts impliques dans les essais.
Palavras-chave: Heavy metals
Column test
Cumulative mass method
Metaux lourds
Essai en colonne
Methode de la masse cumulative
Editor: Canadian Journal of Civil Engineering
Tipo de Acesso: 2006 NRC Canada
URI: http://dx.doi.org/10.1139/L06-038
http://www.locus.ufv.br/handle/123456789/23588
Data do documento: 2006
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