Sorption of some cations on ammonium molybdophosphate embedded into structure of silica and titania

Zakutevskyy, O. I.; Sydorchuk, V.; Kovtun, M. F.; Khalameida, S.; Skwarek, Ewa

doi:10.1007/s11164-022-04936-x

Cited by 2 publications

(5 citation statements)

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“…According to their sorption capacity, the studied ions can be placed in the series of U >> Sr > Cs. This sequence is also characteristic of other phosphate-containing sorbents which were tested under the same conditions [ 10 , 24 ].…”

Section: Resultsmentioning

confidence: 90%

“…The observed shift of this band towards higher wavenumbers obviously indicates the ion-exchange sorption of cations. (iii) Finally, a decrease in the specific surface area and the total pore volume occurs as a result of sorption, as described in References [ 10 , 52 ]. For example, the decrease in the specific surface area after sorption of cesium, strontium, and uranium is 35, 59, and 171 m 2 /g, respectively, for samples modified by HTT of the wet gel at 250 °C (No.…”

Section: Resultsmentioning

confidence: 99%

“…The studies were performed under static conditions; ratio of solid/liquid was 1:2000. The pH value was adjusted to 5.2 ± 0.2 (without background) during sorption of ions U (VI), Cs (I), and Sr (II) [ 10 , 22 ]. Under these conditions, studied metals are present in the solution, mainly in the form of cations.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, inorganic materials are promising for the removal of radionuclides from wastewater [ 5 , 6 , 7 , 8 , 9 ]. Due to Bronsted acidity, the amorphous and crystalline tetravalent metal phosphates as water-insoluble salts have many characteristics that are important from a practical point of view, namely, thermostability, resistance to acid, alkali and oxidation media, as well as high ion exchange capacity and sorption affinity, including to Cs(I), U(VI), and Sr(II) ions [ 1 , 2 , 3 , 7 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…The tin (IV) phosphate SnP belongs to the family of phosphates that are typical cation exchangers [ 1 , 2 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Indeed, tin phosphate with various P/Sn ratios has attracted attention for a long time as a material for the sorption and separation of cations [ 7 , 8 , 9 , 11 ], including for cation removal from nuclear waste solutions [ 1 , 5 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Hydrothermal, Microwave, and Mechanochemical Treatments of Tin Phosphate on Sorption of Some Cations

Zakutevskyy¹,

Khalameida²,

Sydorchuk³

et al. 2023

Materials

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The samples of precipitated tin (IV) phosphate, modified using hydrothermal, microwave, and mechanochemical procedures, were studied in the process of Cs(I), Sr(II), and U(VI) ion sorption. The initial and modified samples were investigated before and after sorption using XRD, XRF, FTIR, and nitrogen adsorption–desorption. It was found that the modification procedures transformed the micro-mesoporous structure of the initial sample into a meso–macroporous structure. As a result, the sorption capacity in relation to all ions increases several times. This indicates the determining role of the porous structure, primary content, and mesopore size on the sorption activity of tin phosphate. The samples, treated in the form of a wet gel, which is a novel procedure, showed the maximum sorption indicators. The sorption of all the tested ions is described by the Langmuir isotherm.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%