Ivanovo, Ivanovo, Russian Federation
Ivanovo, Ivanovo, Russian Federation
Ivanovo, Ivanovo, Russian Federation
The paper presents the results of the cotton cellulose modification with glycine. To form dialdehyde-cellulose and its subsequent treatment with aminoacetic acid we conducted the modification through an oxidation stage of cellulose with sodium metoperiodate. We studied the sorption properties of the original and modified cellulose samples in relation to Cu(II) and Fe(II) ions. Bykinetic experiments we found the degree of extraction of copper(II) and iron(II) ions. The modified sample was approximately 25% higher compared to the original one. We obtained the most correct results when processing the kinetic sorption curves within the framework of pseudo-second order kinetics model. We determined the optimum conditions for modifying cotton cellulose to achieve maximum sorption of copper (II) and iron (II) ions and obtained the equilibrium-kinetic characteristics of modified and unmodi-fied cotton cellulose. When studying the sorption equilibrium in the heterophase system "cellulose sorbent - aqueous solution of metal sulfate" we took sorption iso-therms, processed them in the framework of Langmuir mode, and determined the values of the ultimate sorption capacity of the native and modified cellulose. We found the ultimate sorption capacity of the modified sorbent is about 1.5-2 times higher than the ultimate sorption capacity of native cotton cellulose. We have ob-tained IR spectra of native andmodified cellulose samples. Also we have performed elemental analysis and obtained images of the sorption materials surface structure based on cotton cellulose using SEM.
cotton cellulose, modification, aminoacetic acid, sorption, ions Cu(II) and Fe(II)
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