Copper Sorption from Aqueous Solutions by Plasma Modified Polyacrylonitrile Beads |
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| Authors: | A. Simeonova T. Godjevargova D. Vladkova |
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| Affiliation: | (1) Department of Ecology and Environmental protection, Technical University, 9010 Varna, Studentska str.1, Bulgaria;(2) Department of Biotechnology, University "Prof. Dr. A. Zlatarov", 8010 Bourgas, Prof. Yakimov str.1, Bulgaria;(3) Department of Polymer, University of Chem. Technol. and Metallurgy, Sofia, Kliment Ohridski str. 8, Bulgaria |
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| Abstract: | Summary The adsorption of Cu(II) ions from aqueous solutions on acrylonitrile(AN) copolymer sorbents has been studied. Porous sorbents from acrylonitrile copolymer-90.6% acrylonitrile (AN), 8.1% methylmethacrylate (MMA) and 1.4% 2-acrylamido-methylpropensylfonic acid (AMPSA) have been prepared and modified by ammonia, air and ethylenediamine plasma. Fourteen types of sorbents have been obtained changing plasma agent and plasma vacuum. The Cu(II) ions uptake has been studied and the sorbent with best sorption characteristics determined. The best sorption uptake has been achieved for the modified sorbent obtained at ethylenediamine plasma modification under 5 Pa plasma vacuum (PAN1-1.20 mgeq/g). Effect of sorbents regeneration after different elution cycles has also been investigated . The sorbents showed high effectiveness of regeneration towards Cu(II) ions, which was above 50% after the IV cycle of elution. |
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