| en |
Study of cobalt (II) biosorption on Sargassum sp. by experimental design methodology
Soleymani, F.; Khani, M. H.; Pahlavanzadeh, H. & Manteghian, M.
Abstract
In this study, the biosorption of cobalt (II) ions
on Sargassum sp., brown algae, was investigated in a batch
system. The combined effects of operating parameters such
as biomass treatment, initial pH, temperature, initial metal
ion concentration, and biosorbent dosage on the biosorption
of cobalt (II) ions on Sargassum sp. were analyzed
using response surface methodology. The Mg(NO3)2 was
used as a pretreatment agent for Sargassum sp. The optimum
biosorption conditions were determined as Mg-treated
biomass, initial pH 7.0, temperature 45 ° C, biosorbent
dosage 0.1 g, and initial cobalt (II) concentration 300 mg/l.
At optimum biosorption conditions, the biosorption
capacity of Mg-treated biomass for cobalt (II) ions was
found to be 80.27 mg/g after 90-min biosorption. The
Langmuir and Freundlich isotherm models were applied to
the equilibrium data. The results are best fitted by the
Freundlich model.
Keywords
Biosorption; Cobalt; Pretreated algae; Response surface methodology; Sargassum sp.
|
