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A fully bio-sourced adsorbent of heavy metals in water fabricated by immobilization of quinine on cellulose paper
- Aka, Ehu C., Nongbe, Medy C., Ekou, Tchirioua, Ekou, Lynda, Coeffard, Vincent, Felpin, François-Xavier
- Journal of environmental sciences (China) 2019 v.84 pp. 174-183
- adsorbents, adsorption, alkynes, azides, cadmium, cellulose, chemical bonding, copper, cycloaddition reactions, heavy metals, lead, models, nickel, pH, paper, quinine, zinc
- The fabrication of a fully bio-sourced adsorbent of Cd(II) by covalent immobilization of quinine on cellulose paper is described. The double bond of commercially available quinine was converted to a terminal alkyne function which was reacted with cellulose paper, chemically modified with azide functions, through a 1,3-dipolar cycloaddition, leading to Cell-Quin. The adsorption efficiency of Cell-Quin was investigated to determine the optimal pH, contact time and dose of adsorbent, ultimately leading to high levels of removal. The mechanism of adsorption of Cell-Quin was deeply rationalized through kinetic experiments and isotherm modeling. We also showed that Cell-Quin could adsorb other heavy metals such as Cu(II), Pb(II), Ni(II) and Zn (II).