| Summary: | In this work three amino-functionalized cellulose-poly(glycidyl methacrylate) graft copolymers (AM-Cell-g-PGMA) were tested as ion exchange resins for the adsorption of dyes, from aqueous solutions using batch techniques. The three adsorbents were prepared earlier based on the aminization of grafted copolymer with tri-ethylamine hydrochloride (TEAC), di-ethylene tri-amine (DETA) and tri-ethylene tetra-amine (TETA) which represented as R1, R2 and R3 respectively. Adsorption time and solution pH were varied. The maximum adsorption capacities of R1 were 147.5 and 150 (mg/g), while the maximum adsorption capacities of R2 were 117.7 and 133 (mg/g), and finally, the maximum adsorption capacities of R3 were124 and 138 (mg/g) for Acid black 194 and C.I. Reactive black 5 dyestuffs respectively. It was found that the maximum adsorption capacities for the three resins decreased in the order R1> R2> R3 for the sorption of the two dyes. With respect to these results, the R1 resin was then selected for further adsorption investigations regarding isotherm and kinetic studies. The isotherm data were well described by the Langmuir equation over the concentration range studied. Kinetic parameters of sorption were determined enlightening the obeying of the pseudo-second order kinetic model for the investigated system.
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