الفهرس | Only 14 pages are availabe for public view |
Abstract Low cost biosorbents containing 8-hydroxyquinoline functionality were fabricated in its natural (RI&R2) or magnetic (R3) forms. Removal of AI(Ill) from aqueous solutions was studied using chemically modified cellulose with 8-hydroxyquinoline through two different methods. Kinetic studies indicate that the adsorption reaction follows the pseudo-second order model and equilibrium adsorption was achieved within 60-10 min. R2 with long spacer arm showed fast kinetics towards Al(III) removal if compared with RI. Thermodynamic parameters obtained indicate that the adsorption process is spontaneous and exothermic. The observed high surface area of R3 (139.04 m2jg) may be explained by the proposed formed stretched cellulose thin layer on the surface of magnetite particles. High uptake capacity of R3 (2.8 mmol/g) at pH 2.5 may be explained to proceed through interaction between the aquo-iron complexe with high positive charge [Fe(H20)4(OH)2Fe(H20)4]4+ and the resin active sites (nitrogen atoms along with 8-hydroxyquinoline moieties). The adsorption process was found to fit well pseudo-second order model and possessed an endothermic spontaneous nature. Selective and efficient adsorption of Fe(Ill) from real samples made R3 resin applicable in the field of Drinking water treatment.Fast and efficient adsorption of the investigated metal ion indicates that its uptake from different drinking waters as a harmful pollutant may be applicable in the applied field. |