-Adsorption process is an efficient alternative in metal ions removal. Many materials can be used in this process; among them, we can cite biological materials such as aquatic macrophytes. The macrophytes have shown a high percentage of metal ions removal and they have an advantage of being low cost and have the possibility of growing. In view of this, the aim of this work is evaluate lead removal by Salvinia natans in dynamic system. Essays were carried out in a fixed bed column for different flow rates. The result showed the higher amount of lead removed from the column was 0.152 mmo.g -1 for a flow rate of 1 mL.min -1 and an initial concentration of lead of 1 mmol.L -1 . In order to know the changes in surface morphology of S. natans before and after the process as well as the functional groups that participate of the removal of lead, the characterization using the SEM/EDX and FTIR techniques was performed.
-Salvinia natansmacrophyte has been studied as a potential biosorbent for metal ions removal. We investigated in this work the performance of the macrophyte in recovery of lead and chromium from bicomponent synthetic solution from two different systems, batch and fixed bed. Equilibrium data were obtained by batch system through isotherms and fitted toLangmuir and Langmuir-Freundlich models.The breakthrough curves were performed at three different concentrations ratio. In order to know the biosorption mechanism FT-IR analyses were performed for S. natans before and after uptake of metal ions. The results showed different functional groups on the biomass surface and the ability of these groups bind with Cr +3 and Pb
2+ions in aqueous solution.
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