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Orientador(es)
Resumo(s)
The ability of a wild strain of Scenedesmus
obliquus, isolated from a heavy metal-contaminated environment, to remove Cd2+ from aqueous solutions was studied at several initial concentrations. Viable biomass removed metal to a maximum extent of 11.4 mgCd/g at 1 mgCd/l, with most Cd2+ being adsorbed onto the cell surface. A commercially available strain (ACOI 598) of the same microalga species was also exposed to the same Cd concentrations, and similar results were obtained for the maximum extent of metal removal. Heat-inactivated cells
removed a maximum of 6.04 mgCd/g at 0.5 mgCd/l. The highest extent of metal removal, analyzed at various pH values, was 0.09 mgCd/g at pH 7.0. Both strains of the
microalga tested have proven effective in removing a toxic heavy metal from aqueous solutions, hence supporting their choice for bioremediation strategies of industrial effluents.
Descrição
Palavras-chave
Microalga Heavy metal Bioaccumulation Biosorption pH Inactivated biomass
Contexto Educativo
Citação
"World Journal of Microbiology and Biotechnology". ISSN 1573-0972. 25:9 (2009) 1573–1578
Editora
Springer Verlag