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. 2013 Jul;4(4):367-74.
doi: 10.1016/j.jare.2012.07.004. Epub 2012 Aug 14.

Biosorption of cadmium and lead from aqueous solution by fresh water alga Anabaena sphaerica biomass

Azza M Abdel-Aty  1 , Nabila S Ammar  1 , Hany H Abdel Ghafar  1 , Rizka K Ali  1
Affiliations

Biosorption of cadmium and lead from aqueous solution by fresh water alga Anabaena sphaerica biomass

Azza M Abdel-Aty et al. J Adv Res. 2013 Jul.

Abstract

The present work represents the biosorption of Cd(II) and Pb(II) from aqueous solution onto the biomass of the blue green alga Anabaena sphaerica as a function of pH, biosorbent dosage, contact time, and initial metal ion concentrations. Freundlich, Langmuir, and Dubinin-Radushkevich (D-R) models were applied to describe the biosorption isotherm of both metals by A. sphaerica biomass. The biosorption isotherms studies indicated that the biosorption of Cd(II) and Pb(II) follows the Langmuir and Freundlish models. The maximum biosorption capacities (qmax ) were 111.1 and 121.95 mg/g, respectively, at the optimum conditions for each metal. From the D-R isotherm model, the mean free energy was calculated to be 11.7 and 14.3 kJ/mol indicating that the biosorption mechanism of Cd(II) and Pb(II) by A. sphaerica was chemisorption. The FTIR analysis for surface function group of algal biomass revealed the existence of amino, carboxyl, hydroxyl, and carbonyl groups, which are responsible for the biosorption of Cd(II) and Pb(II). The results suggested that the biomass of A. sphaerica is an extremely efficient biosorbent for the removal of Cd(II) and Pb(II) from aqueous solutions.

Keywords: Alga; Anabaena sphaerica; Biosorption; Heavy metals.

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Figures

Fig. 1
Fig. 1
Photo of River Nile Alga Anabaena sphaerica.
Fig. 2
Fig. 2
FTIR spectra of Anabaena sphaerica dry biomass unloaded and Pb-loaded biomass.
Fig. 3
Fig. 3
Effect of pH on the biosorption of Cd and Pb by Anabaena sphaerica.
Fig. 4
Fig. 4
Effect of the dose of Anabaena sphaerica biomass on the biosorption of Cd and Pb.
Fig. 5
Fig. 5
Effect of contact time on the biosorption of Cd and Pb by Anabaena sphaerica.
Fig. 6
Fig. 6
Biosorption of Cd and Pb on Anabaena sphaerica as function of initial concentration at the optimum removal conditions.
Fig. 7
Fig. 7
Freundlich isotherm for the biosorption of Cd and Pb on Anabaena sphaerica.
Fig. 8
Fig. 8
Langmuir isotherm for Cd and Pb biosorption onto Anabaena sphaerica biomass.
Fig. 9
Fig. 9
D–R biosorption isotherm of Cd and Pb ion on Anabaena sphaerica biomass.
None
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References

    1. Dahiya S., Tripathi R.M., Hegde A.G. Biosorption of heavy metals and radionuclide from aqueous solutions by pre-treated arca shell biomass. J Hazard Mater. 2008;150:376–386. - PubMed
    1. Chen Z., Ma W., Han M. Biosorption of nickel and copper onto treated alga (Undaria pinnatifida): application of isotherm and kinetic models. J Hazard Mater. 2008;155:327–333. - PubMed
    1. Sari A., Tuzen M. Biosorption of Pb(II) and Cd(II) from aqueous solution using green alga (Ulva lactuca) biomass. J Hazard Mater. 2008;152:302–308. - PubMed
    1. Barbier F, Duc G, Petit-Ramel M, Adsorption of lead and cadmium ions from aqueous solution to the montmorillonite: water interface, Colloids Surf., A: Physicochem. Eng. Aspects 2000;166:153–159.
    1. Selatnia A., Boukazoula A., Kechid N., Bakhti M.Z., Chergui A., Kerchich Y. Biosorption of lead(II) from aqueous solution by a bacterial dead Streptomyces rimosus biomass. Biochem Eng J. 2004;19:127–135.

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