Immobilization of inorganic ion-exchanger into biopolymer foams – Application to cesium sorption

Vincent, Chloë; Hertz, Audrey; Vincent, Thierry; Barré, Yves; Guibal, Eric

doi:10.1016/j.cej.2013.09.087

Cited by 58 publications

(45 citation statements)

References 46 publications

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“…These results are similar to those of previous breakthrough experiments on various fixed-bed adsorbent layers [10]. The trajectories of the breakthrough curves shown here are markedly different for different materials, and both curves deviated from the typical shape shown in published reports [13,14].…”

Section: Breakthrough Curves For Cs Solutions At Various Flow Speeds supporting

confidence: 81%

Mechanism of Cesium Adsorption by Carbonized Rice Hull and Beech Sawdust

Miura

2018

Separations

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This study used the results of breakthrough experiments to elucidate the mechanism of cesium adsorption on carbonized rice hull and beech sawdust. The shape of the breakthrough curves and the substance eluted from the carbonized rice hull and beech sawdust were investigated for various flow speeds and concentrations of the solute through the adsorbent layer. The ratio of the Cs concentration at the column outlet (C) to that at the inlet (C 0 ), C/C 0 , was calculated to evaluate the mechanism. It was found that carbonized rice hull could slowly adsorb Cs as the Cs solution passed through the fixed-bed layer. On the other hand, beech sawdust could rapidly adsorb Cs upon contact with the Cs solution. It was, therefore, suggested that the two materials adsorbed Cs through an ion-exchange reaction with potassium on their respective surfaces. Moreover, the shape of the breakthrough curve of beech sawdust changed as the Cs concentration at the column inlet was varied. This phenomenon was presumably caused by a factor other than the swelling or contraction of the adsorption layer. Further analysis revealed that the breakthrough curve of beech sawdust is indicative of an overshoot phenomenon when cesium was adsorbed by beech sawdust.

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Section: Breakthrough Curves For Cs Solutions At Various Flow Speeds supporting

confidence: 81%

Mechanism of Cesium Adsorption by Carbonized Rice Hull and Beech Sawdust

Miura

2018

Separations

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“…The semi-qualitative element analysis showed that for KCoFC(L), the atomic ratio for K/Fe was 1.2 while for Co/Fe it was 1.4. Similarly, for obtained was consistent with a recent study reporting a K/Fe atomic ratio of 1.23 for potassium nickel hexacyanoferrate using EDX analysis [24].…”

Section: Sem-edx Analysissupporting

confidence: 81%

Selective sorption of rubidium by potassium cobalt hexacyanoferrate

Naidu

Nur

Loganathan

et al. 2016

Separation and Purification Technology

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“…The major issue with these materials is the presence of a number of cations that can block active sorption sites and hence, requires pre-treatment with chemicals before use. Apart from these, titanosilicate materials [95] , fly ash, metal transition ferrocyanides [8,11,58] and hexacyanoferrates [64] have also been credited with excellent surface area for adsorption, high cation exchange capacity, compatibility with final waste forms, high swelling, high mechanical strength and radiation stability (up to about 200 KGy). Apart from these, titanosilicate materials [95] , fly ash, metal transition ferrocyanides [8,11,58] and hexacyanoferrates [64] have also been credited with excellent surface area for adsorption, high cation exchange capacity, compatibility with final waste forms, high swelling, high mechanical strength and radiation stability (up to about 200 KGy).…”

Section: Advantages and Disadvantages Of Various Adsorbentsmentioning

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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Immobilization of inorganic ion-exchanger into biopolymer foams – Application to cesium sorption

Cited by 58 publications

References 46 publications

Mechanism of Cesium Adsorption by Carbonized Rice Hull and Beech Sawdust

Mechanism of Cesium Adsorption by Carbonized Rice Hull and Beech Sawdust

Selective sorption of rubidium by potassium cobalt hexacyanoferrate

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

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