From Chemistry Towards Technology Step-By-Step From Chemistry Towards Technology Step-By-Step От химии к технологии шаг за шагом 2782-1900 81564 10.52957/27821900_2023_01_107 Научные статьи Scientific articles Научные статьи Effect of chemical modification of cotton cellulose by aminoacetic acid on the sorption of Cu(II) and Fe(II) ions Effect of chemical modification of cotton cellulose by aminoacetic acid on the sorption of Cu(II) and Fe(II) ions Никифорова Татьяна Евгеньевна Nokoforova Tatyana Evgenjevna tatianaenik@mail.ru

доктор химических наук;

doctor of chemical sciences;

 Козлов Владимир Александрович Kozlov Vladimir Aleksandrovich

доктор химических наук;

doctor of chemical sciences;

 Софронов Артемий Романович Sofronov Artemiy Romanovich artemijsofronov@gmail.com Ивановский государственный химико-технологический университет Ivanovo State University of Chemistry and Technology 23 03 2023 23 03 2023 4 1 107 116 10 02 2023 21 03 2023 https://chemintech.ru/en/nauka/article/81564/view

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.

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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