Volume 5, Number 2 (3 2007)                   sjsph 2007, 5(2): 13-24 | Back to browse issues page


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Saeedi R, Naddafi K, Nabizadeh R. Lead(II) and cadmium(II) biosorption from aqueous solutions by the Sargassum sp. biomass. sjsph. 2007; 5 (2) :13-24
URL: http://sjsph.tums.ac.ir/article-1-172-en.html

Abstract:   (4554 Views)

Background and Aim:We studied the biosorption of lead(II) and cadmium(II) from aqueous solutions by the brown algae Sargassum sp. biomass in a batch system.

The heavy metal uptake was quite rapid, reaching 88-96% of the equilibrium capacity of biosorption in 15 minutes.

Material and Methods: Kinetic data were analyzed using the pseudo first-order, pseudo second-order, and saturation and second-order rate equations.

Results: The pseudo second-order and saturation rate equations gave the best fit with the experimental data(R2 > 0.99). The data obtained from experiments of single-component biosorption isotherm were analyzed using the Freundlich, Langmuir, Freundlich-Langmuir and Redlich-Peterson isotherm models. The Redlich-Peterson equation was found to provide the best fit with the experimental data (R2 > 0.99). Also the other models described the isotherm of lead(II) and cadmium(II) biosorption with relatively high correlation coefficients (R2 > 0.93).

Conclusion: Using the Langmuir model, the maximum uptake capacities (qm) of Sargassum sp. for Pb2+ and Cd2+ were 1.70 and 1.02mmolg-1, respectively.

Keywords: Lead(II), Cadmium(II)
Full-Text [PDF 205 kb]   (1303 Downloads)    
Type of Study: Research | Subject: General
Received: 2006/01/29 | Accepted: 2006/06/20 | Published: 2013/08/11

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