Investigation of Sr uptake by birnessite-type sorbents from seawater

Egorin, Andrei; Sokol'nitskaya, T. A.; Azarova, Yuliya; Portnyagin, A. S.; Balanov, M. I.; Misko, Darya; Shelestyuk, Evgeny; Kalashnikova, Anastasia; Tokar, Eduard; Тананаев, И. Г.; Авраменко, В. А.

doi:10.1007/s10967-018-5905-2

Cited by 23 publications

(5 citation statements)

References 34 publications

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“…The obtained phosphate sorbents are characterized by lower K d values compared to the materials used for the removal of individual radionuclides, both studied in this work and described in the literature [34][35][36][37][38]. However, depending on the composition of mixed Ti-Ca-Mg phosphates, it is possible to obtain sorbents characterized by high affinity for all three radionuclides 137 Cs, 90 Sr and 60 Co.…”

Section: Comparison Study With Other Materialsmentioning

confidence: 87%

Sorption of stable and radioactive Cs(I), Sr(II), Co(II) ions on Ti–Ca–Mg phosphates

Иванец

Milyutin

Шашкова

et al. 2020

J Radioanal Nucl Chem

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In this paper, we studied the features of stable and radioactive Cs(I), Sr(II) and Co(II) ions sorption on Ti-Ca-Mg phosphates. The significant differences in the sorption of macro quantities of stable Cs + , Sr 2+ and Co 2+ ions and trace concentrations of 137 Cs, 90 Sr and 60 Co radionuclides were found. It has to be taken into account for evaluation the effectiveness of sorbents for the treatment of real liquid radioactive waste. Comparative studies with industrial sorbents have shown that the synthesized in this study mixed Ti-Ca-Mg phosphates are promising materials for one-stage treatment of liquid radioactive waste with complex chemical and radionuclide composition.

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Section: Comparison Study With Other Materialsmentioning

confidence: 87%

Sorption of stable and radioactive Cs(I), Sr(II), Co(II) ions on Ti–Ca–Mg phosphates

Иванец

Milyutin

Шашкова

et al. 2020

J Radioanal Nucl Chem

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“…Sorbent was obtained according to the method described in [22] by interaction between 10 g of KMnO 4 and 250 mL of concentrated H 2 O 2 . Brown precipitate was filtered under vacuum and washed with 250-500 mL of deionized H 2 O and then dried at 75 • C for 6 h. The obtained product was ground and held in 3 M solution of NaOH (m/V ratio 0.1-0.15 g mL −1 ) for 24 h. Thereafter, the material was annealed at 500 • C in air for 6 h, the heating rate 8.3 • C min −1 .…”

Section: Methodsmentioning

confidence: 99%

“…Dry samples of the sorbents fraction 0.1-0.2 mm were placed into plastic cylinders and poured by simulated seawater (S-SW) without Sr 2+ ions and left for a day. The S-SW composition was prepared as in [22] with the following ion concentrations:…”

Section: Methodsmentioning

confidence: 99%

Morphological Features and Sorption Performance of Materials Based on Birnessite Exposed to Various Reductive Conditions

Portnyagin

Egorin

Голиков

et al. 2018

Colloids and Interfaces

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The article is devoted to the evolution of structural, morphological, and sorption characteristics of layered manganese oxide (birnessite) under various conditions close to the real operating regime of the sorbents for radioactive waste processing. To identify the phase composition in the birnessites, we implemented XRD analysis, while SEM and temperature-programmed reduction (TPR) were used to study morphological and redox features of the materials, respectively. Structural changes after various kinds of treatment of birnessites were tracked using low temperature nitrogen sorption. Sorption characteristics were assessed under static and in dynamic conditions on the efficiency of Sr2+ removal from simulated seawater. TPR combined with kinetic analysis revealed the decrease of particle sizes in the birnessites after repeated use in sorption-regeneration cycle and reduction with hydrazine. Despite the fact that the porous structure of the materials remains preserved, the surface morphology of birnessite changes drastically depending on the reducing agent. Hydrazine treatment increases the sorption performance of the birnessite followed by degradation of mechanical properties, thus, preventing such sorbent from repeated use. Kinetic analysis of TPR allows quantifying differences in morphology and porous structure of manganese oxide materials. The specific surface area, amorphous surface structure, and accessibility of Mn+3 sites are the most important factors for birnessite sorption performance.

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“…For the liquid waste with more than 50% SW, the application of selective sorbents was found necessary 13 . The survey of the latest scientific literature demonstrates the intensified efforts to develop Sr-selective sorbents/ion-exchangers for application in SW. Materials tested in SW encompass inorganic, organic, and composite materials: BaSiO 3 and BaMnO 4 13 , Ba-titanate 14 , Ba-impregnated 4A zeolite 15 , macroporous LTA-monoliths 16 apatite-based, and non-apatite phosphates 17 , 18 , granulated Na-birnessite 19 , alginate microsphere 20 , MnO 2 -alginate and zeolite-alginate composites 21 , 22 , magnetic zeolite nanocomposites 23 , and composite magnetic nanoparticles derived from industrial sludge 24 .…”

Section: Introductionmentioning

confidence: 99%

“…The efficacy of the sorption-reagent materials, including BaSiO 3 , BaMnO 4 13 , Ba-titanate 14 , Ba-impregnated 4A zeolite 15 , is enhanced as a result of their chemical reaction with the anionic components of LRW (SO 4 2− ), and co-precipitation of Sr with insoluble barium-sulfate. On the other hand, granulated Na-birnessite 19 , a low crystallized layered modification of manganese oxide, exhibited structural benefits for efficient Sr removal in the presence of chemically close elements. The similar effects are operating using synthetic zeolites of LTA type (Linde Type A) 25 .…”

Section: Introductionmentioning

confidence: 99%

Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids

Smičiklas

Coha

Jović

et al. 2021

Sci Rep

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The efficient, selective, and economical sorbents for the removal of Sr radionuclides are largely needed for the decontamination of effluents with high salinity. In this study, the removal of Sr was investigated using the zeolite produced from the Bayer process liquids. Based on the XRD, SEM/EDS analysis, the product was pure and highly crystalline zeolite 4A (Z4A). Removal of Sr was fast (5 min for 100% removal at 8.80 mg/L), with high maximum sorption capacity (252.5 mg/L), and independent on the initial pH in the range 3.5–9.0. Specific sorption of Sr by protonated groups on the Z4A surface was operating in addition to ion-exchange with Na ions. The selectivity of Z4A decreased in the order Sr > Ca > K > Mg > Na. 84% of Sr was separated from seawater within 5 min, at the Z4A dose of 5 g/L, while efficiency increased to 99% using the dose of 20 g/L. Desorption of radioisotope 89Sr from seawater/Z4A solid residue was very low in deionized water (0.1–0.2%) and groundwater (0.7%) during 60 days of leaching. Z4A is a cost-effective, selective, and high-capacity medium for Sr removal, which provides high stability of retained radionuclides.

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Investigation of Sr uptake by birnessite-type sorbents from seawater

Cited by 23 publications

References 34 publications

Sorption of stable and radioactive Cs(I), Sr(II), Co(II) ions on Ti–Ca–Mg phosphates

Sorption of stable and radioactive Cs(I), Sr(II), Co(II) ions on Ti–Ca–Mg phosphates

Morphological Features and Sorption Performance of Materials Based on Birnessite Exposed to Various Reductive Conditions

Efficient separation of strontium radionuclides from high-salinity wastewater by zeolite 4A synthesized from Bayer process liquids

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