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Equilibrium of Cu(II) and Ni(II) biosorption by marine alga Sargassum filipendula in a dynamic system: competitiveness and selectivity |
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| Authors: | Kleinübing S J da Silva E A da Silva M G C Guibal E |
| Institution: | a School of Chemical Engineering, Campinas State University, UNICAMP, Cidade Universitária Zeferino Vaz, Caixa Postal 6066-CEP 13081-970 Campinas, SP, Brazil b Ecole de Mines d’Alès, Laboratoire Génie de l‘Environnement Industriel, 6 avenue de Clavières, F-30319 Alès Cedex, France c School of Chemical Engineering, West Paraná State University, UNIOESTE, Rua da Faculdade 2550, Jardim La Salle, CEP 85903-000 Toledo, PR, Brazil |
| Abstract: | 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). |
| Keywords: | Biosorption Breakthrough curves Binary solutions Sorption selectivity Sorption isotherms |
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