Polymer-clay composites of polyacrylates as sorbents of heavy metal ions

Narod, А.; Sarshesheva, A.; Iminova, R.; Kayralapova, G.Zh.; Zhumagaliyeva, Shynar; Beysebekov, M. K.; Abilov, Zharylkasyn A.

doi:10.15328/chemb_2012_3209-213

Cited by 2 publications

(2 citation statements)

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“…inductively coupled plasma mass spectrometry (ICP MS) on the ELAN-9000 quadrupole mass spectrometer (PerkinElmer SCIEX), the provisions of [22,23] were taken into account; b.…”

Section: Instruments and Measurementsmentioning

confidence: 99%

“…Previously, the authors of [23] synthesized hybrid composites by in-situ polymerization of a mixture of bentonite and acrylamide and acrylic acid monomers in the presence of modifiers such as starch [24] with MBAAm as a crosslinking agent. The work was mainly related to determination of the swelling parameters of polymer compositions in water and their sorption characteristics in respect to the heavy and nonferrous metals ions.…”

Section: Establishment Of the Structure Of Hybrid Compositionsmentioning

confidence: 99%

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Hybrid Composite Materials for Immobilization of Radionuclides in Liquid Radioactive Waste

GК¹

2023

J Miner Sci Materials

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The biphasic hybrid composite materials for immobilization and fixation of radionuclides of the Liquid Radioactive Waste (LRW) of the research water-water reactor KIR WWR-K have been studied. It was found that the hybrid compositions have a high synergistic effect regard to the sorption of radionuclides, especially 137Cs+ and 134Cs+ . The distribution coefficient of cesium radionuclides in the composite materials are 2 times higher in comparison with the those sorption activity in the mineral matrix. It has been established that the sorption of radionuclides by two-phase hybrid compositions is carried out by a combination of three mechanisms. Firstly, due to the electrostatic binding reaction between the functional groups of sorbents and metal ions stabilized by the system of coordination bonds with electron-donating nitrogen and oxygen atoms of the amino and carbonyl groups of the polymer matrix. Secondly, as a result of ion exchange between counterions of the mineral matrix and radionuclides ions in the environmental solution. Finally, due to the superequimolar absorption of radionuclides as a result of deformation of the crystal lattice of mineral fillers of the polymer matrix of bentonite and copper ferrocyanide, which increases their pore size. It has been shown that biphasic hybrid composite materials have an increased mechanical and radiation resistance while retaining elasticity even at high doses of electron irradiation, at which in despite on a noticeable decrease the value of deformation there is no significant decline in their compressive strength. The obtained information on the mechanism of binding of biphasic hybrid composite materials with various metal ions makes it possible to synthesize new classes of materials for selective sorption of certain types of radionuclides in the body of mineral and polymer matrices. This will allow us to use these materials as a highly effective sorption materials with a synergetic effect for the detection, identification, immobilization and fixation of LRW radionuclides.

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“…inductively coupled plasma mass spectrometry (ICP MS) on the ELAN-9000 quadrupole mass spectrometer (PerkinElmer SCIEX), the provisions of [22,23] were taken into account; b.…”

Section: Instruments and Measurementsmentioning

confidence: 99%

Section: Establishment Of the Structure Of Hybrid Compositionsmentioning

confidence: 99%

Hybrid Composite Materials for Immobilization of Radionuclides in Liquid Radioactive Waste

GК¹

2023

J Miner Sci Materials

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Synthesis, structure and features of formation of biphasic hybrid polymer compositions based on bentonite

Mamytbekov¹,

Жаканбаев²,

Nurtazin³

et al. 2022

KazNU Chem Bull

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The synthesis, structure and features of the formation of biphasic hybrid polymer compositions based on natural ionite (bentonite – BT), its intercalated complex (ICC) with a solid solution of copper ferrocyanide K4-хCux[Fe(CN)6] and a synthetic rare cross-linked acrylamide-acrylic acid copolymer were studied. The mechanism of formation of biphasic intercalated and percolated structures was analyzed by means of X-ray diffraction, X-ray fluorescence analysis, IR-Fourier spectroscopy and stress-strain curves. It is shown that the impregnation of the mineral bentonite filler into the polymer matrix, including its intercalated complex {BT:K4-xCux[Fe(CN)6]} is accompanied by an increase of non-uniformity of the structure of the hybrid composite material. It has been established that the main factor characterizing the deformation stability of the composite is the adhesive strength at the interface between the mineral filler and the polymer matrix. Under uniaxial tension of the P[AA-AA]{BT} composition and the percolated complex P[AA-AA]{BT:K4-xCux[Fe(CN)6]} their internal structure is rearranged resulting in stretching of agglomerates of solid fillers along polymer chains, which is determined by the adhesion force between polymer chains and mineral particles at the phase boundary. It is proposed to consider such biphasic hybrid composite materials as a promising class of interpenetrating networks with valuable applied properties.

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Polymer-clay composites of polyacrylates as sorbents of heavy metal ions

Cited by 2 publications

References 0 publications

Hybrid Composite Materials for Immobilization of Radionuclides in Liquid Radioactive Waste

Hybrid Composite Materials for Immobilization of Radionuclides in Liquid Radioactive Waste

Synthesis, structure and features of formation of biphasic hybrid polymer compositions based on bentonite

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