Sorption of Cesium on smectite-rich clays from the Bohemian Massif (Czech Republic) and their mixtures with sand

Vejsada, J.; Jelínek, Emil; Řanda, Z.; Hradil, David; Přikryl, Richard

doi:10.1016/j.apradiso.2004.05.075

Cited by 21 publications

(16 citation statements)

References 13 publications

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“…The Fe (hydro)oxides have also been referred to as an important sorbent immobilizing Cs ions [3,12,18,19] though some crystalline Fe oxide has been synthesized for Cs adsorption [20]. However, in this work, no signals of Cs are detected even they were directly mapped onto the Fe oxides surface (i.e.…”

Section: Sem/eds Studying Of Cs Adsorptionmentioning

confidence: 93%

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Cesium adsorption and distribution onto crushed granite under different physicochemical conditions

Tsai

Wang

et al. 2009

Journal of Hazardous Materials

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Section: Sem/eds Studying Of Cs Adsorptionmentioning

confidence: 93%

“…As shown in Table 2, the median value of E a was 7.8 J mol −1 , suggesting that Cs adsorption is a physicosorption reaction, in which weak electrostatic force drives the ion-exchange reaction [8][9][10][11][12]. …”

Section: Kinetic Analysismentioning

confidence: 99%

Cesium adsorption and distribution onto crushed granite under different physicochemical conditions

Tsai

Wang

et al. 2009

Journal of Hazardous Materials

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“…Especially montmorillonite [6] and illite [36] were shown to be the primary accessory minerals ensuring high intensity and capacity factors for Cs 1 sorption on clays. The R d values of cesium were reported to increase from 10 2 to 10 3 mL/g levels as the sand content was decreased with concomitant rise in clay percentage of smectite-rich clays [37]. We found that bentonite had the highest Langmuir capacity for cesium sorption (see Table 3), while analysis of D-R isotherm data revealed the highest mean free energy of sorption (E) for sepiolite (see Table 4), attributable to the presence of montmorillonite and illite, respectively, in these clays.…”

Section: Adsorption Related To the Mineral Composition Of Sorbentmentioning

confidence: 99%

Investigation and modeling of cesium(I) adsorption by Turkish clays: Bentonite, zeolite, sepiolite, and kaolinite

Bayülken¹,

Başçetin²,

Güçlü

et al. 2011

Env Prog and Sustain Energy

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The cesium ion adsorption by Turkish clays, i.e., bentonite, zeolite, sepiolite, and kaolinite, was investigated as a function of Cs 1 concentration, pH, time, and temperature using the Cs-137 radiotracer method. The analysis of some major and minor components of clays was performed with ED-XRF. Bentonite was shown to exhibit the highest capacity and sorption affinity toward Cs. The best fits for adsorption isotherms were with Freundlich and D-R models. The second order rate constant of cesium sorption was highest for kaolinite among the clays. Cesium adsorption proceeded essentially by ion exchange and partly by specific adsorption mechanisms. The results showed that especially bentonite and zeolite can be used as effective barrier materials for sorptive hindrance of an expanding Cs radioisotope plume.

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“…Because of its high reactivity, it is classified as a hazardous material. Cesium is mined mostly from pollucite, while as a by-product of uranium fission [13] , many radioactive isotopes of cesium ( 134 Cs and 137 Cs are of significant health concern) are released into the environment. Thyroid cancer is one of the terrible consequences of this metal adsorption [10,11] .…”

Section: Introductionmentioning

confidence: 99%

“…Cs metal, which behaves similar to potassium, can easily be adsorbed to the body and distributed into the soft tissues of the whole body [9] . In particular, 137 Cs a gamma-emitter, is part of generated wastes from extractive industries, and due to its physical (long half-life, T 1/2 =30.17 y) and chemical (high solubility) characteristics, it could easily transferred to the food chain [14][15][16][17] . Its acute poisoning causes medullar dystrophy, asthma, allergy, heart problems, disorders in reproductive function and bone mineralization and damages of thyroid and liver and, mutagenic disorders [12] .…”

Section: Introductionmentioning

confidence: 99%

Influence of adsorption parameters on cesium uptake from aqueous solutions- a brief review

et al. 2015

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Due to rapid population growth, technological advancement and industrial revolution, the rate of generated waste effluents has become a grave concern. Cesium which possesses high fission yield is generally transferred to liquid wastes especially those emanated from the nuclear power plants, reprocessing of spent fuels, nuclear weapon testing and radionuclides production facilities for medical applications etc. Radiocesium ( 137 Cs) is one of the hazardous radionuclides creates adverse effects on human health and environment.Due to its physical (T 1/2 =30.17 y) and chemical characteristics (alkalinity, solubility etc.), it can be easily assimilated by the living organisms. As a result, the removal of cesium from wastewater is imperative from the health point of view. Several techniques are implemented but in recent time, adsorption has been gaining increasing attention to the scientific community owing to a number of reasons. Hence, this paper presents an overview on sorption of cesium from wastewaters. Consequently, several critical parameters such as sorption capacity, percentage efficiency and the influence of several factors on cesium uptake by various adsorbents have been reviewed in details. 6 Adsorption/ ion exchange of cesium ions onto synthesized and natural adsorbentsThis is a method by which a sorbate is removed or accumulated on the immobile solid from its liquid or gaseous surroundings, and usually referred to as liquid-solid interaction.Normally, this process occurs at the phase of the sorbent and so, it is a surface-based phenomenon [40] . Adsorption can take different dimensions, if the process is initiated as a result of weak intermolecular forces (Van der Waals interactions) then it is specifically called physisorption and this force being weak in nature results into reversible adsorption, but if occurs due to the formation of chemical bonds between the molecules of adsorbate and the adsorbent it is known as chemosorption. Ion exchange on the other hand is a reversible chemical process in which an ion from solution exchanges with similarly charged ion attached to the adsorbent, the solid particle [40] . Due to their common features, adsorption and ion exchange are grouped together as sorption processes for effective sequester of toxins from waste/drinking waters [41,42] . Adsorption is recognized as an effective and economic method for the removal of radionuclides compared to the other approaches owing to a number of reasons such as; the ease of design and operation, adsorbate-specificity, better treatment with no/little secondary waste generation, possibility of using at low concentration, high efficient performance, ease of regeneration and reuse, suitability for both batch and column studies, and the availability of the adsorbents [43] . Normally, a good adsorbent must have a large surface area, good macroporous structure and be stable under chemical, radiation and thermal reaction conditions. However, the behaviour and efficiency of adsorbents can also be influenced by the condition of the so...

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Sorption of Cesium on smectite-rich clays from the Bohemian Massif (Czech Republic) and their mixtures with sand

Cited by 21 publications

References 13 publications

Cesium adsorption and distribution onto crushed granite under different physicochemical conditions

Cesium adsorption and distribution onto crushed granite under different physicochemical conditions

Investigation and modeling of cesium(I) adsorption by Turkish clays: Bentonite, zeolite, sepiolite, and kaolinite

Influence of adsorption parameters on cesium uptake from aqueous solutions- a brief review

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