Lead sorption by extraction chromatographic resins on the base Di-(tert-butylcyclohexano)-18-crown-6 and its application for analysis of marine samples

Dovhyi, I. I.; Bezhin, N. A.; Kapranov, Sergey V.; Lyapunov, A. Yu.

doi:10.1007/s10967-020-07164-y

Cited by 11 publications

(4 citation statements)

References 21 publications

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“…The distribution coefficient (K d , mL/g), dynamic exchange capacity (DEC, mg/g), and the total dynamic exchange capacity (TDEC, mg/g) were determined according to the equations given in [46]. The degree of recovery (R, %) and the sorbents capacity (q, mg/g) were determined according to the equations given in [30].…”

Section: Determination Of the Cesium Phosphorus And Beryllium Concent...mentioning

confidence: 99%

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Radionuclides’ Recovery from Seawater Using FIC and FIC A Sorbents

Bezhin,

Milyutin,

Kuzmenkova

et al. 2023

Materials

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To solve radioecological and oceanological problems (estimate the vertical transport, flows of particulate organic carbon, phosphorus biodynamics, submarine groundwater discharge, etc.), it is necessary to determine the natural values of the radionuclides’ activity in seawater and particulate matter. For the first time, the radionuclides’ sorption from seawater was studied using sorbents based on activated carbon modified with iron(III) ferrocyanide (FIC) and based on activated carbon modified with iron(III) hydroxide (FIC A—activated FIC) obtained by FIC sorbent treatment with sodium hydroxide solution. The possibility of trace amounts of phosphorus, beryllium, and cesium recovery in laboratory conditions has been investigated. Distribution coefficients, dynamic, and total dynamic exchange capacities were determined. The physicochemical regularities (isotherm and kinetics) of sorption have been studied. The results obtained are characterized via Langmuir, Freindlich, and Dubinin–Radushkevich isotherm equations, as well as pseudo-first and pseudo-second-order kinetic models, intraparticle diffusion, and the Elovich model. Under expeditionary conditions, the sorption efficiency of 137Cs using FIC sorbent, 7Be, 32P, and 33P—using FIC A sorbent with a single-column method by adding a stable tracer, as well as the sorption efficiency of radionuclides 210Pb and 234Th with their natural content by FIC A sorbent in a two-column mode from large volumes of seawater was assessed. High values of efficiency of their recovery by the studied sorbents were achieved.

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Section: Determination Of the Cesium Phosphorus And Beryllium Concent...mentioning

confidence: 99%

“…To separate 210 Pb and 210 Po from the accompanying radionuclides, extraction chromatographic sorbents based on crown ethers Sr Resin [28] and Pb Resin [29] were also proposed. Effective analogs of these sorbents based on an organofluoride diluent were obtained [30].…”

Section: Introductionmentioning

confidence: 99%

Radionuclides’ Recovery from Seawater Using FIC and FIC A Sorbents

Bezhin,

Milyutin,

Kuzmenkova

et al. 2023

Materials

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“…10 DtBuCH18C6 has also been used in many applications using various separation techniques. 11,12 Thus, DtBuCH18C6 was used in our study as the associated extractant of choice with SLM for the purification of strontium from the yttrium matrix as well as from the other associated impurities.…”

Section: Introductionmentioning

confidence: 99%

“…The choice of extractant, diluent, solid support, and compositions of the solutions in the feed and strip chambers dictates the selectivity and enrichment of the element or analyte of interest achievable in the process. , Among the various potential 18C6 group crown ethers, DtBuCH18C6 exhibits a higher extraction efficiency of Sr owing to its reduced association probability, which is attributed to the presence of bulky tertiary butyl groups as well as to its higher hydrophobicity . DtBuCH18C6 has also been used in many applications using various separation techniques. , Thus, DtBuCH18C6 was used in our study as the associated extractant of choice with SLM for the purification of strontium from the yttrium matrix as well as from the other associated impurities.…”

Section: Introductionmentioning

confidence: 99%

Development of a Purification Method for ⁸⁹Sr Produced in a Fast Reactor Using a Supported Liquid Membrane

Saha

Vithya

Kumar

2022

Ind. Eng. Chem. Res.

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A carrier-free 89Sr source has been produced in FBTR, IGCAR, Kalpakkam, via 89Y (n, p)89Sr for application in nuclear medicine, especially for bone pain palliation. Purification of 89Sr from an FBTR irradiated Y target by the supported liquid membrane (SLM) technique offers several advantages due to its bulk-scale production. Crown ether-based SLM separation with a modifier was standardized for the purification of 89Sr from the bulk irradiated Y matrix and other impurities of activated products (60Co, 65Zn). Various process parameters such as concentration of the extractant, modifier, soaking time of the membrane with the extractant, acidity in the feed chamber, and stirring speed were studied for the optimum transport condition. Long-duration transport experiments were then carried out with the optimum parameters with a tracer mixture and transported from the FBTR irradiated yttria dissolver solution for the purification of 89Sr. The proposed transport mechanism was validated with viscosity and water content measurement of the membrane phase. The present SLM system containing 9 M HNO3//DtBuCH18C6/D2EHPA/heptane/PTFE//0.3 M HNO3 and pH 5 HNO3//D2EHPA/heptane/PTFE//9 M HNO3 established, for the first time, satisfactory purification of 89Sr from its irradiated yttria matrix in a fast reactor, i.e., FBTR, and was amenable to continuous operation with long-term stability, demonstrated for about not less than a period of a week. By incorporating a pair of membranes that are Sr and Y selective, a Sr source with a radionuclidic purity of ≥99.6% was obtained from actual dissolver solutions of the FBTR irradiated yttrium matrix.

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Study of sorbents for analysis of radiocesium in seawater samples by one-column method

Bezhin

Dovhyi

Milyutin

et al. 2021

J Radioanal Nucl Chem

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Lead sorption by extraction chromatographic resins on the base Di-(tert-butylcyclohexano)-18-crown-6 and its application for analysis of marine samples

Cited by 11 publications

References 21 publications

Radionuclides’ Recovery from Seawater Using FIC and FIC A Sorbents

Radionuclides’ Recovery from Seawater Using FIC and FIC A Sorbents

Development of a Purification Method for ⁸⁹Sr Produced in a Fast Reactor Using a Supported Liquid Membrane

Study of sorbents for analysis of radiocesium in seawater samples by one-column method

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Lead sorption by extraction chromatographic resins on the base Di-(tert-butylcyclohexano)-18-crown-6 and its application for analysis of marine samples

Cited by 11 publications

References 21 publications

Radionuclides’ Recovery from Seawater Using FIC and FIC A Sorbents

Radionuclides’ Recovery from Seawater Using FIC and FIC A Sorbents

Development of a Purification Method for 89Sr Produced in a Fast Reactor Using a Supported Liquid Membrane

Study of sorbents for analysis of radiocesium in seawater samples by one-column method

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Development of a Purification Method for ⁸⁹Sr Produced in a Fast Reactor Using a Supported Liquid Membrane