Cellulose paper grafted with polyamines as powerful adsorbent for heavy metals
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The preparation of new adsorbents for heavy metals consisting of cellulose paper grafted with polyamine moieties is described. The tosylation of pristine cellulose paper allowed the subsequent displacement of the tosylated leaving groups with either ethylenediamine or spermine provided the corresponding cellulose-based polyaminated adsorbents Cell-Ed and Cell-Sperm, respectively. Optimizations related to the influence of experimental conditions (time and pH) on the adsorption processes associated to detailed studies devoted to the understanding of the mechanism of adsorption through kinetic experiments and isotherm modeling provided a rational understanding for the removal Cu(II) and Pb(II). Interestingly, Cell-Sperm also displayed outstanding adsorption properties for other metal cations such as Cd(II), Zn(II) and Fe(II).
KeywordsCellulose paper Adsorbent Heavy metal Water purification Isotherm
We gratefully acknowledge the University of Nantes, the “Centre National de la Recherche Scientifique” (CNRS), the “Région Pays de la Loire” in the framework of a “recrutement sur poste stratégique”. F.-X. Felpin. is a member of the “Institut Universitaire de France” (IUF). M.C. Nongbe thanks the ‘‘Ministère de l’Enseignement Supérieur et de la Recherche Scientifique de Côte d’Ivoire” for a visiting grant in France. We acknowledge Christine Labrugère (PLACAMAT, University of Bordeaux), François-Xavier Lefèvre and Denis Loquet (CEISAM, University of Nantes) for XPS, SEM and elemental analyses, respectively. Michel Terray (Malvern Instruments) was of great help for conducting zeta potential analyses.
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