From Chemistry Towards Technology Step-By-Step From Chemistry Towards Technology Step-By-Step От химии к технологии шаг за шагом 2782-1900 89188 10.52957/2782-1900-2024-5-3-126-135 Научные статьи Scientific articles Научные статьи Sorption properties of a new modified flax fibre sorbent Sorption properties of a new modified flax fibre sorbent Никифорова Татьяна Евгеньевна Nokoforova Tatyana Evgenjevna tatianaenik@mail.ru

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 24 09 2024 24 09 2024 5 3 126 135 27 06 2024 30 08 2024 https://chemintech.ru/en/nauka/article/89188/view

The purpose of this study is to develop a modified sorbent of flax waste and investigate its sorption properties towards Cu (II) ions. The authors conducted the modification in two steps. The first step was oxidation of flax fibre cellulose with sodium metaperiodate to dialdehyde cellulose, the second one was the addition of taurine to increase the sorption characteristics of the modified sorbent. The paper presents the conditions for the periodate oxidation reaction of flax fibre and the treatment of the resulting dialdehyde cellulose with taurine. We determined the sorption characteristics of the modified sorbent in comparison with the original flax fibre. Kinetic studies allowed us to establish the time of reaching sorption equilibrium in the heterophase system ‘aqueous solution of metal salt-sorbent’ and determine the reaction order using pseudo first and pseudo-second order kinetics models. The authors processed the sorption isotherms obtained during the experiments using the Langmuir model. The maximum sorption capacity increased by 3 times compared to the original flax fibre. IR spectroscopy confirmed the improvement of equilibrium and kinetic characteristics of flax fibre occuring as a result of the appearance of new sorption centres in its structure.

The purpose of this study is to develop a modified sorbent of flax waste and investigate its sorption properties towards Cu (II) ions. The authors conducted the modification in two steps. The first step was oxidation of flax fibre cellulose with sodium metaperiodate to dialdehyde cellulose, the second one was the addition of taurine to increase the sorption characteristics of the modified sorbent. The paper presents the conditions for the periodate oxidation reaction of flax fibre and the treatment of the resulting dialdehyde cellulose with taurine. We determined the sorption characteristics of the modified sorbent in comparison with the original flax fibre. Kinetic studies allowed us to establish the time of reaching sorption equilibrium in the heterophase system ‘aqueous solution of metal salt-sorbent’ and determine the reaction order using pseudo first and pseudo-second order kinetics models. The authors processed the sorption isotherms obtained during the experiments using the Langmuir model. The maximum sorption capacity increased by 3 times compared to the original flax fibre. IR spectroscopy confirmed the improvement of equilibrium and kinetic characteristics of flax fibre occuring as a result of the appearance of new sorption centres in its structure.

 flax fibre copper ions taurine sorption modification flax fibre copper ions taurine sorption modification This work was funded by the Ministry of Science and Higher Education of the Russian Federation (Project No. FZZW–2024–0004). This work was funded by the Ministry of Science and Higher Education of the Russian Federation (Project No. FZZW–2024–0004).

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