Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2962
Título: Optimization of Cu(II) biosorption onto ascophyllum nodosum by factorial design methodology
Autor: Freitas, Olga M.
Delerue-Matos, Cristina
Boaventura, Rui
Palavras-chave: Factorial design
Box–Behnken
Biosorption
Response surface methodology
Ascophyllum nodosum
Data: 2009
Editora: Elsevier
Relatório da Série N.º: Journal of Hazardous Materials; Vol. 167, Issue 1-3
Resumo: A Box–Behnken factorial design coupled with surface response methodology was used to evaluate the effects of temperature, pH and initial concentration in the Cu(II) sorption process onto the marine macroalgae Ascophyllum nodosum. The effect of the operating variables on metal uptake capacitywas studied in a batch system and a mathematical model showing the influence of each variable and their interactions was obtained. Study ranges were 10–40ºC for temperature, 3.0–5.0 for pH and 50–150mgL−1 for initial Cu(II) concentration. Within these ranges, the biosorption capacity is slightly dependent on temperature but markedly increases with pH and initial concentration of Cu(II). The uptake capacities predicted by the model are in good agreement with the experimental values. Maximum biosorption capacity of Cu(II) by A. nodosum is 70mgg−1 and corresponds to the following values of those variables: temperature = 40ºC, pH= 5.0 and initial Cu(II) concentration = 150mgL−1.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2962
ISSN: 0304-3894
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0304389409000247
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