Biosorbents from Plant Fibers of Hemp and Flax for Metal Removal: Comparison of Their Biosorption Properties
Chiara Mongioví,
Nadia Morin-Crini,
Dario Lacalamita,
Corina Bradu,
Marina Raschetti,
Vincent Placet,
Ana Rita Lado Ribeiro,
Aleksandra Ivanovska,
Mirjana Kostić,
Grégorio Crini
Affiliations
Chiara Mongioví
Laboratoire Chrono-Environnement, Faculté des Sciences & Techniques, UMR 6249, Université Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
Nadia Morin-Crini
Laboratoire Chrono-Environnement, Faculté des Sciences & Techniques, UMR 6249, Université Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
Dario Lacalamita
Laboratoire Chrono-Environnement, Faculté des Sciences & Techniques, UMR 6249, Université Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
Corina Bradu
PROTMED Research Centre, Department of Systems Ecology and Sustainability, University of Bucharest, Spl. Independentei 91–95, 050095 Bucharest, Romania
Marina Raschetti
FEMTO-ST, CNRS/UFC/ENSMM/UTBM, Department of Applied Mechanics, Université Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
Vincent Placet
FEMTO-ST, CNRS/UFC/ENSMM/UTBM, Department of Applied Mechanics, Université Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
Ana Rita Lado Ribeiro
Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
Aleksandra Ivanovska
Innovation Center of the Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
Mirjana Kostić
Department of Textile Engineering, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
Grégorio Crini
Laboratoire Chrono-Environnement, Faculté des Sciences & Techniques, UMR 6249, Université Bourgogne Franche-Comté, 16 route de Gray, 25000 Besançon, France
Lignocellulosic fibers extracted from plants are considered an interesting raw material for environmentally friendly products with multiple applications. This work investigated the feasibility of using hemp- and flax-based materials in the form of felts as biosorbents for the removal of metals present in aqueous solutions. Biosorption of Al, Cd, Co, Cu, Mn, Ni and Zn from a single solution by the two lignocellulosic-based felts was examined using a batch mode. The parameters studied were initial metal concentration, adsorbent dosage, contact time, and pH. In controlled conditions, the results showed that: (i) the flax-based felt had higher biosorption capacities with respect to the metals studied than the hemp-based felt; (ii) the highest removal efficiency was always obtained for Cu ions, and the following order of Cu > Cd > Zn > Ni > Co > Al > Mn was found for both examined biosorbents; (iii) the process was rapid and 10 min were sufficient to attain the equilibrium; (iv) the efficiency improved with the increase of the adsorbent dosage; and (v) the biosorption capacities were independent of pH between 4 and 6. Based on the obtained results, it can be considered that plant-based felts are new, efficient materials for metal removal.
