New amine-functionalized adsorbent was prepared by chemical modification of cellulose fibers extracted from Juncus acutus L (Smar) plants in order to be used as chelating support for the removal of copper ions (Cu (II)). Evidence of grafting DiEthyleneTriamine (DET) onto the raw Smar fibers was provided by nitrogen analysis and Fourier Transform Infrared (FTIR) spectra study. The ability of the binary system [Cu(II)/DET-Smar] for binding Acid Blue 25 (AB25) was then investigated in batch process. Equilibrium data were analyzed by Langmuir, Freundlich and Jossens models. The obtained results reveal that the adsorption of AB25 onto [Cu (II)/DET-Smar] complex show good compliance with the Jossens isotherm. Various thermodynamic activation parameters were estimated and it was found that the adsorption was spontaneous and follows an exothermic process.
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