A carregar...
Publicação
Optimization of Cu(II) biosorption onto ascophyllum nodosum by factorial design methodology
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 95.84 KB | Adobe PDF |
Orientador(es)
Resumo(s)
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.
Descrição
Palavras-chave
Factorial design Box–Behnken Biosorption Response surface methodology Ascophyllum nodosum
Contexto Educativo
Citação
Editora
Elsevier