Adsorption of Uranyl Ions in Aqueous Solutions of Maleic Anhydride-alt-Styrene Copolymers
Abstract
In this study, Maleic anhydride-alt-styrene (MA/S) copolymer was
synthesized in benzene solution with an initiator such as
azobisisobutyronitrile by free radical copolymerization. Anhydride units are
seen in resulting copolymer and anhydride units are active. By considering
activities of anhydride units, adsorptions of uranyl ions in uranyl nitrate solutions
with spectrophotometric method was investigated uranyl ion concentration, at
different temperature and dimension of MA/S copolymer. In the adsorption
investigation, Langmuır (L) type was suggested according to Giles
classification system. Binding parameters such as equilibrium constant (K),
monolayer coverage (n) and thermodynamic parameters such as heat of adsorption
(ΔH), free energy of adsorption (ΔG) and entropy of adsorption (ΔS) for (MA/S)
copolymer were calculated by using van’t Hoff and Klotz linearization
methods. As a result, it can be stated
that MA/S copolymer can be used as a good absorbent for uranyl from removal
from waste water.
Keywords
References
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