Radioactive removal by adsorption on Yesan clay and zeolite

Kim, Chan Ki; Kong, Jin Young; Chun, Byung-Sik; Park, Jae-Woo

doi:10.1007/s12665-012-1923-5

Cited by 20 publications

(6 citation statements)

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“…Calculation of effective diffusion coefficients has revealed higher values for Cs + ions than for Co 2+ , which was in agreement with the selectivity of ion exchangers. The intensity of cation sorption by zeolites was also found to be inversely proportional to their ionization potentials …”

Section: Results and Discussionmentioning

confidence: 96%

“…The intensity of cation sorption by zeolites was also found to be inversely proportional to their ionization potentials. 9 3.1.4. Statistical Analysis of Simplex Lattice Mixture Design.…”

Section: Resultsmentioning

confidence: 99%

“…One of the methods for purification of LRW is based on the utilization of inorganic sorbents/ion-exchangers, with high capacity, high chemical and radiological stability, and low cost. ,− In this regard, numerous studies dealt with the applicability of abundant natural minerals or waste derived materials. − Despite the fact that LRWs contain different isotopes in varying concentrations, sorbents were commonly tested using single metal solutions and two-component mixtures . The effect of competition between Co 2+ , Sr 2+ , and Cs + was reported in a few studies.…”

Section: Introductionmentioning

confidence: 99%

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Study of Simultaneous Radionuclide Sorption by Mixture Design Methodology

Šljivić-Ivanović

Smičiklas

Dimović

et al. 2015

Ind. Eng. Chem. Res.

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The problem of simultaneous removal of Co 2+ , Sr 2+ and Cs + ions from aqueous solutions was addressed using oxide, phosphate and aluminosilicate materials from economical and abundant sources. Competition between cations was analyzed by following approaches: (i) addition of each sorbent separately to variously concentrated cation mixtures (using simplex lattice experimental design methodology), (ii) application of mixture sorbents (using extreme vertices experimental design), and (iii) consecutive addition of sorbents in varying order. Investigated materials exhibited different selectivity for Co 2+ , Sr 2+ and Cs + in the mixture, thus combination of materials in one-step sorption, or successive addition of sorbents in multi-step process, lead to better removal efficiency. Regression equations obtained by statistical analysis satisfactorily predicted sorbed amounts of cations as a function of both the composition of mixed waste and the composition of mixed sorbent. Mixture designs should be considered as useful tools for getting better insight into the complex sorption processes.

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Section: Results and Discussionmentioning

confidence: 96%

“…The intensity of cation sorption by zeolites was also found to be inversely proportional to their ionization potentials. 9 3.1.4. Statistical Analysis of Simplex Lattice Mixture Design.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study of Simultaneous Radionuclide Sorption by Mixture Design Methodology

Šljivić-Ivanović

Smičiklas

Dimović

et al. 2015

Ind. Eng. Chem. Res.

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“…In general, solid matrices that have shown superior immobilization potential towards radioactive ions in aqueous solutions are suitable for testing in the contaminated soil. Based on the numerous investigations of the sorption affinities and capacities toward variety of radioactive pollutants, the most prominent groups of materials are aluminosilicates [73][74][75][76][77][78][79][80] and phosphates [81][82][83][84][85][86][87][88][89]. The main operating mechanisms are quite different for these two groups: while aluminosilicate addition to soil increases the number of sorption sites, phosphate materials, mainly from the apatite group, act through several removal mechanisms (ion-exchange, formation of specific surface complexes, and structural incorporation of pollutants by co-precipitation and dissolution/precipitation processes).…”

Section: Radionuclide Immobilization (Stabilization) By Soil Amendmentsmentioning

confidence: 99%

Radioactive Contamination of the Soil: Assessments of Pollutants Mobility with Implication to Remediation Strategies

Smičiklas¹,

Šljivić-Ivanović²

2016

Soil Contamination - Current Consequences and Further Solutions

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Accidental releases, nuclear weapons testing, and inadequate practices of radioactive waste disposal are the principal human activities responsible for radioactive contamination as a new and global form of soil degradation. Understanding the radionuclide distribution, mobility and bioavailability, as well as the changes caused by the variation of environmental conditions, is essential for soil rehabilitation. This chapter aims to highlight the importance of evaluating radionuclide distribution, for the selection of proper in situ or ex situ remediation strategy. Attention was focused onto remediation methods based on radioactive pollutants redistribution, for enhanced separation (chemical extraction) or containment (in situ immobilization). When the excavation and off-site leaching treatments are uneconomic, impractical, or unnecessary, in situ stabilization by the addition of appropriate reactive materials is an alternative approach. The optimization of factors in control of chemical leaching methods, selection of costeffective immobilization agents, especially among suitable wastes and by-products, and verification of long-term effects of remediating actions are the major challenges for future investigation in this field. Furthermore, the improvement and standardization of the methods for radionuclide speciation are necessary to enable comparison between studies and monitoring of the effects achieved by the soil treatments.

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“…Current studies on the adsorption of alkali metal ions are mainly focused on the adsorption of one kind of alkali metal ion, especially lithium or cesium ion. 12,13 However, the adsorption of rubidium and cesium ions would be affected by the presence of other alkali metal ions. Therefore, it is necessary to investigate the competitive adsorption behavior of the alkali metal ions in multi-element aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%