Chitosan-based biosorbents: immobilization of metal hexacyanoferrates and application for removal of cesium radionuclide from aqueous solutions

Zemskova, L. A.; Egorin, Andrei; Tokar, Eduard; Иванов, В.В.

doi:10.1007/s10971-019-05019-x

Cited by 9 publications

(4 citation statements)

References 28 publications

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“…The synthesis of transition metal ferrocyanides in a chitosan matrix is described in detail in [ 26 , 27 , 28 ]. In [ 26 ], the freshly prepared chitosan resin was saturated with copper(II) and washed, after which wet granules were placed into a solution of K 4 [Fe(CN) 6 ] with formation of the resin K 2 Cu 3 [Fe(CN) 6 ] 2 in the phase.…”

Section: Discussionmentioning

confidence: 99%

“…Grains contain a lot of water, so they are difficult to store and impossible to transport at low temperatures, which limits their practical application. Fabrication of hybrid materials is significantly facilitated by simple mixing of two solutions (acidic chitosan solution containing a transition metal salt and alkaline solution of potassium ferrocyanide) resulting in precipitation of chitosan with simultaneous synthesis of transition metal FOC in the “host” matrix [ 27 , 28 ].…”

Section: Discussionmentioning

confidence: 99%

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Synthesis of Inorganic Compounds in the Matrix of Polysaccharide Chitosan

et al. 2021

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Data related to the fabrication of hybrid materials based on the polysaccharide chitosan were systematized and reviewed. The possibility of using chitosan as a “host” matrix for in situ synthesis of inorganic compounds for the preparation of various types of composite materials were investigated. Coprecipitation of metal oxides/hydroxides (Fe, Ni, Al, Zr, Cu and Mn) with chitosan was carried out through the alkalinization of solutions containing metal salts and chitosan, with the addition of ammonia or alkali solutions, homogeneous hydrolysis of urea, or electrophoretic deposition on the cathode. The synthesis of transition metal ferrocyanides and hydroxyapatite was achieved from precursor salts in a chitosan solution with simultaneous alkalinization. The mechanism of composite formation during the coprecipitation process of inorganic compounds with chitosan is discussed. Composite materials are of interest as sorbents, coatings, sensors, and precursors for the production of ceramic and electrode materials.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Synthesis of Inorganic Compounds in the Matrix of Polysaccharide Chitosan

et al. 2021

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“…In comparison, the structure of the γchitin chain is slightly more complex than that of other types of chitin and the existence of γ-chitin is a matter of controversy [8][9][10]. The most stable form of chitin is γ-chitin, while β-chitin can easily be changed to γ-chitin by treating it with lithium thiocyanate or letting it settle out with formic acid [11,12]. The only chemical or inorganic solvents that can dissolve chitin are very concentrated mineral acids.…”

Section: Introduction 1chitinmentioning

confidence: 99%

Insect-Derived Chitin and Chitosan: A Still Unexploited Resource for the Edible Insect Sector

et al. 2023

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Chitin and chitosan are biopolymers that are frequently found in nature and have a broad range of applications in the food, biomedical and industrial sectors, due to their high biological activity. The primary source of chitin and chitosan is shellfish, however, shortages in the supply chain, seasonality issues in their availability, as well as ecological degradation are only a few of the problems with the main chitin resources. Due to the broad spectrum of applications for which chitin can be used, the demand for chitin and its derivatives is increasing. Therefore, the market is looking for widely available, greener alternatives to the main commercial chitin sources. Insects appear as a suitable candidate to fill this gap. During insect rearing and processing, a number of side streams are generated, e.g., exuviae of larvae and pupae, dead adults, etc. which are currently mostly discarded as waste. However, these side streams could constitute a novel and long-term supply of chitin for industrial applications. Recent research has demonstrated the suitability of several edible insect species for the production of chitin and chitosan, wherein the exoskeleton of the black soldier fly and field cricket are rich in chitin, making them a good source for chitin and chitosan extraction and purification among other farmed insect candidates. Moreover, several potential uses have been identified for insect-derived chitin and chitosan. Thus, this review aims to present recent advances in the production of chitin and chitosan from edible insects, specifically on their extraction and purification, as well as on their applications for agriculture, food and nutrition, biomedicine and bioplastic production.

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“…When [Fe(CN) 6 ] 4− was converted to [Fe(CN) 6 ] 3− in nitric acid solution, the efficiency of cesium uptake with Chelex-20 resin containing copper hexacyanoferrate dropped notably, but was recovered in the presence of reducing agents [ 21 ]. In most cases, hexacyanoferrates immobilization in organic ion-exchangers or encapsulation/co-precipitation using natural and synthetic polymers yields composite materials with properties similar to those of the crystalline hexacyanoferrates [ 14 , 22 ]. The lower sorption capacity of composites due to the dilution of reactive sites in the matrix and slower sorption kinetics due to diffusion limitations are compensated by the significantly improved efficiency of sorbents separation [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Polyethylenimine as a Non-Innocent Ligand for Hexacyanoferrates Immobilization

et al. 2022

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To understand how polyethyleneimine (PEI), as a ligand, affects structure and properties of the transition metals hexacyanoferrates (HCFs) immobilized in cross-linked PEI matrix, we have synthesized Cu(II), Zn(II), and Fe(III) HCFs via successive ion-exchange reactions with metal salts and K4[FeII(CN)6] or K3[FeIII(CN)6]. The structure and properties of the obtained materials in comparison with the crystalline HCF analogs were investigated with FT-IR, Mössbauer, and UV–Vis spectroscopy. Complete reduction of Fe(III) to Fe(II) by PEI in HCF(III) was confirmed. When synthesis was performed at pH favoring binding of precursor metal ions by PEI, cyano-bridged hybrids rather than polymer—HCFs composites were formed. Although the obtained hybrids did not demonstrate sorption activity toward cesium ions, known for crystalline HCFs, they are of interest for the other applications. SQUID measurements revealed a significant difference in magnetic properties of PEI–HCFs hybrids in comparison with crystalline HCFs. Due to the Fe(III) to Fe(II) reduction in HCF ions, Cu(II) and Fe(III) HCFs(III) lost the molecular magnets properties in PEI matrix, but magnetic ordering, including ferromagnet-antiferromagnet interactions, was observed in all hybrids over the broad temperature range.

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Chitosan-based biosorbents: immobilization of metal hexacyanoferrates and application for removal of cesium radionuclide from aqueous solutions

Cited by 9 publications

References 28 publications

Synthesis of Inorganic Compounds in the Matrix of Polysaccharide Chitosan

Synthesis of Inorganic Compounds in the Matrix of Polysaccharide Chitosan

Insect-Derived Chitin and Chitosan: A Still Unexploited Resource for the Edible Insect Sector

Polyethylenimine as a Non-Innocent Ligand for Hexacyanoferrates Immobilization

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