Oliveira, R. C. [UNESP]Garcia, O. [UNESP]2014-05-272014-05-272009-12-28Advanced Materials Research, v. 71-73, p. 605-608.1022-6680http://hdl.handle.net/11449/71500This work evaluated kinetic and adsorption physicochemical models for the biosorption process of lanthanum, neodymium, europium, and gadolinium by Sargassum sp. in batch systems. The results showed: (a) the pseudo-second order kinetic model was the best approximation for the experimental data with the metal adsorption initial velocity parameter in 0.042-0.055 mmol.g -1.min-1 (La < Nd < Gd < Eu); (b) the Langmuir adsorption model presented adequate correlation with maximum metal uptake at 0.60-0.70 mmol g-1 (Eu < La < Gd < Nd) and the metal-biomass affinity parameter showed distinct values (Gd < Nd < Eu < La: 183.1, 192.5, 678.3, and 837.3 L g-1, respectively); and (c) preliminarily, the kinetics and adsorption evaluation did not reveal a well-defined metal selectivity behavior for the RE biosorption in Sargassum sp., but they indicate a possible partition among RE studied. © (2009) Trans Tech Publications.605-608engBiosorptionPhysicochemical modelingRare earth metalsSargassum sp.Adsorption modelBatch systemsBest approximationsBiosorption processExperimental dataInitial velocitiesLangmuir adsorption modelMetal adsorptionMetal selectivityMetal uptakePhysicochemical modelPseudo-second-order kinetic modelsSargassum spAdsorptionBiomassEuropiumGadoliniumLanthanumMetalsNeodymiumRare earthsMetal recoveryTrabalho apresentado em evento10.4028/www.scientific.net/AMR.71-73.605WOS:000273541600136Acesso aberto2-s2.0-72449142609