Equilibrium of Cu(II) and Ni(II) biosorption by marine alga Sargassum filipendula in a dynamic system: Competitiveness and selectivity

• Published in: Bioresource technology Vol. 102; no. 7; pp. 4610 - 4617
• Main Authors: Kleinübing, S.J, da Silva, E.A, da Silva, M.G.C, Guibal, E
• Format: Journal Article
• Language: English
• Published: Kidlington [New York, NY]: Elsevier Ltd 01-04-2011; Elsevier
• Subjects: Absorption; Binary systems; Biological and medical sciences; Biotechnology; Chemical Sciences; Copper - pharmacokinetics; Displacement; Dynamic tests; Dynamical systems; Dynamics; Environmental Restoration and Remediation - methods; Fundamental and applied biological sciences. Psychology; Marine; Mathematical analysis; Mathematical models; Models, Chemical; Nickel - pharmacokinetics; Sargassum - metabolism; Sargassum filipendula; Sorption; Dynamic characteristic; Algae; Competitiveness; Adsorption isotherm; Marine alga; Selectivity; Breakthrough curves; Sargassum; Sorption; Heterokontophyta; Binary solutions; Biosorption; Nickel; Sorption selectivity; Copper; Phaeophyceae; Breakthrough curve; Sorption isotherms
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2010.12.049

The study focuses on the equilibrium of dynamic biosorption in single and binary systems containing Cu(II) and Ni(II) ions using Sargassum filipendula (a marine alga). The experiments were performed in fixed-bed columns with both single-component and bi-component metal solutions (using different molar concentrations). Experimental data were fitted with different equilibrium models such as Langmuir, Langmuir with inhibition, Jain and Snowyink and Langmuir-Freundlich equations. The biosorption of pure metal ions in solution presented adequate capacities both for Cu(II) and Ni(II). In binary solutions the preferential sorption of Cu(II) over Ni(II) was demonstrated by the displacement of Ni(II) (marked overshoot on the breakthrough curves).