Data/hora: 12/06/2024 13:37:22

Provedor de dados: | Brazilian Journal of Microbiology
País: | Brazil
Título: | Application of a bacterial extracellular polymeric substance in heavy metal adsorption in a co-contaminated aqueous system
Autores: | Martins,Paula Salles de Oliveira; Almeida,Narcisa Furtado de; Leite,Selma Gomes Ferreira.
Data: | 2008-12-01
Ano: | 2008
Palavras-chave: | EPS; Co-contamination; Heavy metals; Natural attenuation.
Resumo: | The application of a bacterial extracellular polymeric substance (EPS) in the bioremediation of heavy metals (Cd, Zn and Cu) by a microbial consortium in a hydrocarbon co-contaminated aqueous system was studied. At the low concentrations used in this work (1.00 ppm of each metal), it was not observed an inhibitory effect on the cellular growing. In the other hand, the application of the EPS lead to a lower concentration of the free heavy metals in solution, once a great part of them is adsorbed in the polymeric matrix (87.12% of Cd; 19.82% of Zn; and 37.64% of Cu), when compared to what is adsorbed or internalized by biomass (5.35% of Cd; 47.35% of Zn; and 24.93% of Cu). It was noted an increase of 24% in the consumption of ethylbenzene, among the gasoline components that were quantified, in the small interval of time evaluated (30 hours). Our results suggest that, if the experiments were conducted in a larger interval of time, it would possibly be noted a higher effect in the degradation of gasoline compounds. Still, considering the low concentrations that were evaluated, it is possible that a real system could be bioremediated by natural attenuation process, demonstrated by the low effect of those levels of contaminants and co-contaminants over the naturally present microbial consortium.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400034
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822008000400034
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.39 n.4 2008
Fonte: | info:eu-repo/semantics/openAccess