| Registro completo |
| Provedor de dados: |
Electron. J. Biotechnol.
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| País: |
Chile
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| Título: |
Recovery of lead and cadmium ions from metal-loaded biomass of wild cocoyam (Caladium bicolor) using acidic, basic and neutral eluent solutions
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| Autores: |
Horsfall Jnr,Michael
Ogban,Fred E.
Akporhonor,Eyetemi E.
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| Data: |
2006-04-01
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| Ano: |
2006
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| Palavras-chave: |
Cocoyam
Desorption
Heavy metals removal
Metal recovery
Water treatment
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| Resumo: |
The effects of acidic, basic and neutral reagents on the recovery of Pb2+ and Cd2+ from metal-loaded biomass of wild cocoyam (C. bicolor) were investigated by eluting the biomass in five successive cycles using 0.01 M HCl, 0.1 M HCl, 0.01 M NaOH, 0.1 M NaOH and distilled water at different contact times. The data showed that the ease of metal ion recovery from metal -loaded biomass by the eluent solutions is of the order 0.01 M HCl > 0.1 M HCl > 0.01 M NaOH > 0.1 M NaOH > distilled water. Over 94% Pb2+ and 74% Cd2+ of the initially adsorbed metals were recovered by 0.01 M HCl, while < 20% of both metals was recovered by basic reagent. Distilled water recovered less than 9% of both metal ions from the biomass. Macroscopic changes were also observed as the concentration of recovery reagent increased. This study has demonstrated that the selection of a recovery reagent for metal ions on a biomaterial should give consideration to the reusability of the biomass.
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| Tipo: |
Journal article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000200009
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| Editor: |
Pontificia Universidad Católica de Valparaíso
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| Formato: |
text/html
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| Fonte: |
Electronic Journal of Biotechnology v.9 n.2 2006
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