Separation of radiostrontium from seawater using various types of sorbents

Bezhin, N. A.; Dovhyi, I. I.; Kapranov, Sergey V.; Бобко, Н. И.; Milyutin, V. V.; Kaptakov, V. O.; Kozlitin, E. A.; Тананаев, И. Г.

doi:10.1007/s10967-021-07718-8

Cited by 15 publications

(6 citation statements)

References 27 publications

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“…Shungite is almost entirely composed of organic matter and contains less than 1% of impurities (quartz, illite and pyrite). duration (48 h) was chosen as an obviously sufficient period to reach equilibrium according to literature data [17][18][19]. Additionally, to ensure the completeness of sorption, aliquots were repeatedly obtained (after 2 weeks) and measured -activity values varied within the instrumental error (less than 2%).…”

Section: Composition Of the Sorbentsmentioning

confidence: 99%

Sorption of 137Cs and 90Sr on Organic Sorbents

et al. 2021

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The present study examines the sorption of Cs (I) and Sr (II) on organic sorbents in the pH range from 2 to 10, as well as the mechanisms of their binding. In order to determine the influence of the physical properties and the quantity of functional groups of the organic sorbents on sorption, experiments were carried out on organic materials of varying degrees of metamorphism: high-moor peat, hard and brown coals and shungite. A detailed description of their mineral composition, cation exchange capacity, buffering capacity and elemental composition of sorbents is provided. XRD, XRF, SEM and BET adsorption methods were used for assaying. As a result of the conducted research, it can be concluded that Sr (II) showed a higher sorption per unit specific surface area than Cs (I) in the studied range of concentrations and pH values. Sr (II) sorption decreases in the following order: high-moor peat > brown coal > shungite > hard coal. The sorption of Cs (I) is highest on brown coal and lesser for high-moor peat, shungite and hard coal. It is suggested that Cs (I) and Sr (II) can be fixed on carboxyl functional groups and Cs (I), possibly, in insignificant amounts on phenolic hydroxyls of all four studied organic sorbents.

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Section: Composition Of the Sorbentsmentioning

confidence: 99%

Sorption of 137Cs and 90Sr on Organic Sorbents

et al. 2021

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“…Table 1 shows detailed characteristics of the used sorbents based on manganese dioxide and phosphorus(V) oxide [17].…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, to find the optimal sorbent for recovering 7 Be from seawater, it was necessary to evaluate the possibility of using commercially available sorbents based on manganese dioxide. Previously, we studied sorbents of this type in detail and characterized them concerning strontium [17,18] and radium isotopes [19] when recovered from seawater.…”

Section: Introductionmentioning

confidence: 99%

7Be Recovery from Seawater by Sorbents of Various Types

et al. 2023

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For the first time, a comprehensive study of sorbents based on manganese dioxide was carried out for beryllium sorption from seawater in laboratory and expeditionary conditions. The possibility of using several commercially available sorbents based on manganese dioxide (Modix, MDM, DMM, PAN-MnO2) and phosphorus(V) oxide (PD) for 7Be recovery from seawater for solving oceanological problems was evaluated. Beryllium sorption under static and dynamic conditions was studied. The distribution coefficients and dynamic and total dynamic exchange capacities were determined. Sorbents Modix (Kd = (2.2 ± 0.1) × 103 mL/g) and MDM (Kd = (2.4 ± 0.2) × 103 mL/g) showed high efficiency. The dependences of the degree of recovery on time (kinetics) and the capacity of the sorbent on the beryllium equilibrium concentration in solution (isotherm) were established. The data obtained were processed using kinetic models (intraparticle diffusion, pseudo-first and pseudo-second orders, Elovich model) and sorption isotherm equations (Langmuir, Freindlich, Dubinin–Radushkevich). The paper contains results of expeditionary studies to evaluate the sorption efficiency of 7Be from large volumes of the Black Sea water by various sorbents. We also compared the sorption efficiency of 7Be for the considered sorbents with aluminum oxide and previously obtained sorbents based on iron(III) hydroxide.

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“…Therefore, in the last decades, a lot of adsorbents have been developed. 15–17 However, the adsorbent materials for the removal of Sr isotopes with a fast adsorption rate, good stability, and excellent adsorption performance have been rarely reported. 18,19…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in the last decades, a lot of adsorbents have been developed. [15][16][17] However, the adsorbent materials for the removal of Sr isotopes with a fast adsorption rate, good stability, and excellent adsorption performance have been rarely reported. 18,19 a-ZrP (Zr(HPO 4 ) 2 $H 2 O) is a two-dimensional layered phosphate with a layer spacing of 0.76 nm and a large number of P-OH groups between the layers.…”

Section: Introductionmentioning

confidence: 99%