Abstract
Today pollution is an important problem that must be addressed, in this sense adsorption processes are a methodology that is usually used to remove different pollutants such as anions, cations and organic compounds. There is a great diversity of adsorbents ranging from porous oxides, metallic networks and polymeric membranes; magnetite and its composites have been shown to be adsorbent materials for the removal of various contaminants. The present work shows the study of the removal of Ag(I) from aqueous systems with Fe3O4 synthesized from precipitation processes. The magnetite showed an adsorption capacity of 19.84 mgg-1 according to the Langmuir adsorption model, a KL of 0.143 Lmg-1 , the partition coefficient showed a favorable adsorption with values between 0.1-0.01 and an endothermic Gibbs free energy. of 4.8 KJmol-1 . The kinetics of adsorption is carried out using a second order system, observing a decrease in the magnitude of the rate constant (K2) with the initial concentration of Ag(I), which suggests that the adsorption process at concentrations elevated is limited by the intra-particle diffusion of the system
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