Ion exchange of radium and barium in zeolites

Vargas, M. Jurado; Oliguín, M. T.; Erdóñez-Regil, E.; Miménez-Reyes, M.

doi:10.1007/bf02039327

Cited by 34 publications

(19 citation statements)

References 5 publications

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“…[4][5][6]19] The sorption isotherm for whiskers of potassium titanate, which were synthesized by pyrosynthesis at high temperature (>1000 8C), is given as a comparison in Figure 2. The sorption ability of the whiskers is far below that of the nanofibers.…”

mentioning

confidence: 99%

Titanate Nanofibers as Intelligent Absorbents for the Removal of Radioactive Ions from Water

et al. 2008

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confidence: 99%

Titanate Nanofibers as Intelligent Absorbents for the Removal of Radioactive Ions from Water

et al. 2008

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“…In a further review of the relevant literature, we found that Ba 2+ ions (1.36 Å) have an ionic radius extremely similar to that of radioactive 226 Ra 2+ ions (1.43 Å) as well as possessing a similar ion exchange properties [24]. Therefore, there is a significant incentive to use barium as a representative of radium in order to mimic all of the properties of radium except for the radioactivity.…”

Section: Adsorption Experimentsmentioning

confidence: 96%

Sodium niobate adsorbents doped with tantalum (TaV) for the removal of bivalent radioactive ions in waste waters

Paul

Yang

Martens

et al. 2011

Journal of Colloid and Interface Science

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Sodium niobates doped with different amounts of tantalum (Ta(V)) were prepared via a thermal reaction process. It was found that pure nanofibrils and bar like solids can be obtained when tantalum is introduced into the reaction system. For the well crystallized fibril solids, the Na(+) ions are difficult to exchange, and the radioactive ions such as Sr(2+) and Ra(2+) just deposit on the surface of the fibers during the sorption process, resulting in lower sorption capacity and distribution coefficients (K(d)). However, the bar like solids are poorly crystallized and have many exchangeable Na(+) ions. They are able to remove highly hazardous bivalent radioactive isotopes such as Sr(2+) and Ra(2+) ions. Even in the presence of many Na(+) ions, they also have higher K(d). More importantly, such sorption finally intelligently triggers considerable collapse of the structure, resulting in permanent entrapment of the toxic bivalent cations in the solids, so that they can be safely disposed of. This study highlights new opportunities for the preparation of Nb-based adsorbents to efficiently remove toxic radioactive ions from contaminated water.

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“…11 Ion exchange properities of hydrous titanium oxide have been receiving great attention, specially for application in radioactive liquid waste treatment. [12][13][14][15][16][17] Adsorption of some elements such as ferous ions on porous nanocrystalline TiO 2 surface has been conducted by the oxidation of ferous ions using photoelectrochemical process. 18 Some adsorption studies of titanium oxide ion exchanger has been determined such as the adsorption of cobalt on model catalysts consisting of Pd nanoparticles on the surface of TiO 2 using a thermal molecular beam.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics Study for the Sorption of <SUP>134</SUP>Cs and <SUP>60</SUP>Co Radionuclides from Aqueous Solutions

2008

J. Nucl. Radiochem. Sci.

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The removal of cesium and cobalt radionuclides from aqueous chloride solutions using hydrous titanium oxide was investigated. The influence of initial ion concentration, pH, and temperature has been reported. The data obtained have been correlated with Langumir, Freundlich, and Dubinin-Radushkevich (D-R) isotherm models. The effect of temperature on the equilibrium distribution values has been investigated. The thermodynamic parameters such as free energy (∆G o ), enthalpy (∆H o ) and entropy (∆S o ) have been calculated. Maximum ion exchange capacity and the mean free energy of each studied ion have been determined using D-R isotherm model.

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Ion exchange of radium and barium in zeolites

Cited by 34 publications

References 5 publications

Titanate Nanofibers as Intelligent Absorbents for the Removal of Radioactive Ions from Water

Titanate Nanofibers as Intelligent Absorbents for the Removal of Radioactive Ions from Water

Sodium niobate adsorbents doped with tantalum (TaV) for the removal of bivalent radioactive ions in waste waters

Thermodynamics Study for the Sorption of <SUP>134</SUP>Cs and <SUP>60</SUP>Co Radionuclides from Aqueous Solutions

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