Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media
Composite adsorbents based on a natural biopolymer matrix of chitosan, to which 4-amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide and its Se derivative were attached, were synthesized. A complex of physicochemical analysis methods indicates that the direct introduction of a matrix with high ioni...
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2025-01-01
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| author | Anna I. Matskevich Konstantin V. Maslov Veronika A. Prokudina Daria D. Churakova Oleg Yu. Slabko Dmitry K. Patrushev Nikita S. Markin Eduard A. Tokar’ |
| author_facet | Anna I. Matskevich Konstantin V. Maslov Veronika A. Prokudina Daria D. Churakova Oleg Yu. Slabko Dmitry K. Patrushev Nikita S. Markin Eduard A. Tokar’ |
| author_sort | Anna I. Matskevich |
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| description | Composite adsorbents based on a natural biopolymer matrix of chitosan, to which 4-amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide and its Se derivative were attached, were synthesized. A complex of physicochemical analysis methods indicates that the direct introduction of a matrix with high ionic permeability into the reaction mixture contributes to the formation of homogeneous particles of composite with developed surface morphology, which enhances the kinetic and capacitive parameters of uranium sorption in liquid media. It has been established that the direct introduction of a matrix with high ionic permeability into the reaction mixture contributes to the formation of homogeneous particles with a developed surface morphology, which enhances the kinetic and capacitive parameters of uranium sorption in liquid media. The synthesized materials had increased sorption-selective properties towards uranium in the pH range from 4 to 9 under static sorption conditions. The formation of the Se derivative of amidoxime during its attachment to the polymer matrix (Se-chit) contributes to the creation of a more chemically stable and highly effective adsorbent, compared to the direct binding of 4-amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide with chitosan (43AF-chit). The optimal parameters for the synthesis of materials were established. It was demonstrated that the ratio of amidoxime to chitosan should be within the range of 2:1 to 1:2. As the mass content of chitosan increases, the material gradually dissolves and transforms into a gel, resulting in the formation of liquid radioactive waste with a complex chemical composition. It was found that the kinetic sorption parameters of composite materials increase 2–10 times compared to those of non-composite materials. The sorption capacity of uranium in solutions with pH 6 and pH 8 can reach approximately 400–450 mg g<sup>−1</sup>. Under dynamic sorption conditions, the effective filtration cycle values (before uranium slips into the filtrate ≥ 50%) improve significantly when transitioning from a non-composite adsorbent to a composite one: increasing from 50 to 800 b.v. for pH 6 and from 2700 to 4000 b.v. for pH 8. These results indicate that the synthesized sorbents are promising materials for uranium removal from liquid media, suitable for both purification and the recovery of radionuclides as valuable raw materials. |
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| spelling | doaj-art-7931430bb876492dabcc67d571ae4f322025-01-24T13:33:48ZengMDPI AGGels2310-28612025-01-011112410.3390/gels11010024Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized MediaAnna I. Matskevich0Konstantin V. Maslov1Veronika A. Prokudina2Daria D. Churakova3Oleg Yu. Slabko4Dmitry K. Patrushev5Nikita S. Markin6Eduard A. Tokar’7Institute of Natural Sciences and Technosphere Safety, Sakhalin State University, Sakhalin Region, 693000 Yuzhno-Sakhalinsk, Sakhalin Oblast, RussiaInstitute of Natural Sciences and Technosphere Safety, Sakhalin State University, Sakhalin Region, 693000 Yuzhno-Sakhalinsk, Sakhalin Oblast, RussiaInstitute of Natural Sciences and Technosphere Safety, Sakhalin State University, Sakhalin Region, 693000 Yuzhno-Sakhalinsk, Sakhalin Oblast, RussiaInstitute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Primorsky Krai, RussiaInstitute of High Technologies and Advanced Materials, Far Eastern Federal University, 690922 Vladivostok, Primorsky Krai, RussiaInstitute of Natural Sciences and Technosphere Safety, Sakhalin State University, Sakhalin Region, 693000 Yuzhno-Sakhalinsk, Sakhalin Oblast, RussiaInstitute of Natural Sciences and Technosphere Safety, Sakhalin State University, Sakhalin Region, 693000 Yuzhno-Sakhalinsk, Sakhalin Oblast, RussiaInstitute of Natural Sciences and Technosphere Safety, Sakhalin State University, Sakhalin Region, 693000 Yuzhno-Sakhalinsk, Sakhalin Oblast, RussiaComposite adsorbents based on a natural biopolymer matrix of chitosan, to which 4-amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide and its Se derivative were attached, were synthesized. A complex of physicochemical analysis methods indicates that the direct introduction of a matrix with high ionic permeability into the reaction mixture contributes to the formation of homogeneous particles of composite with developed surface morphology, which enhances the kinetic and capacitive parameters of uranium sorption in liquid media. It has been established that the direct introduction of a matrix with high ionic permeability into the reaction mixture contributes to the formation of homogeneous particles with a developed surface morphology, which enhances the kinetic and capacitive parameters of uranium sorption in liquid media. The synthesized materials had increased sorption-selective properties towards uranium in the pH range from 4 to 9 under static sorption conditions. The formation of the Se derivative of amidoxime during its attachment to the polymer matrix (Se-chit) contributes to the creation of a more chemically stable and highly effective adsorbent, compared to the direct binding of 4-amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide with chitosan (43AF-chit). The optimal parameters for the synthesis of materials were established. It was demonstrated that the ratio of amidoxime to chitosan should be within the range of 2:1 to 1:2. As the mass content of chitosan increases, the material gradually dissolves and transforms into a gel, resulting in the formation of liquid radioactive waste with a complex chemical composition. It was found that the kinetic sorption parameters of composite materials increase 2–10 times compared to those of non-composite materials. The sorption capacity of uranium in solutions with pH 6 and pH 8 can reach approximately 400–450 mg g<sup>−1</sup>. Under dynamic sorption conditions, the effective filtration cycle values (before uranium slips into the filtrate ≥ 50%) improve significantly when transitioning from a non-composite adsorbent to a composite one: increasing from 50 to 800 b.v. for pH 6 and from 2700 to 4000 b.v. for pH 8. These results indicate that the synthesized sorbents are promising materials for uranium removal from liquid media, suitable for both purification and the recovery of radionuclides as valuable raw materials.https://www.mdpi.com/2310-2861/11/1/24chitosansorptionamidoximeuranium2,5-oxadiazolespolymers |
| spellingShingle | Anna I. Matskevich Konstantin V. Maslov Veronika A. Prokudina Daria D. Churakova Oleg Yu. Slabko Dmitry K. Patrushev Nikita S. Markin Eduard A. Tokar’ Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media Gels chitosan sorption amidoxime uranium 2,5-oxadiazoles polymers |
| title | Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media |
| title_full | Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media |
| title_fullStr | Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media |
| title_full_unstemmed | Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media |
| title_short | Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N′-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media |
| title_sort | composite sorbents based on chitosan polymer matrix and derivatives of 4 amino n hydroxy 1 2 5 oxadiazole 3 carboximidamide for uranium removal from liquid mineralized media |
| topic | chitosan sorption amidoxime uranium 2,5-oxadiazoles polymers |
| url | https://www.mdpi.com/2310-2861/11/1/24 |
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