Synthetic inorganic ion exchangers—II Salts of heteropolyacids, insoluble ferrocyanides, synthetic aluminosilicates and miscellaneous exchangers

Pekárek, V.; Veselý, Václav

doi:10.1016/0039-9140(72)80124-3

Cited by 140 publications

(15 citation statements)

References 127 publications

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“…The following affinity was derived Cs + = Tl + > Rb + > Ag + > K + > H 3 O + > Na + > Li + , which is in line with the trend in hydration radius or dehydration enthalpy of the cations 26,44. This trend means that it is more facile to remove the water of hydration from Cs + than Li + because of the large ionic radius ( i.e.…”

Section: Polyoxometalate-based Ionic Solids As Cation-exchangerssupporting

confidence: 75%

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Frontiers and progress in cation-uptake and exchange chemistry of polyoxometalate-based compounds

Uchida

2019

Chem. Sci.

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Section: Polyoxometalate-based Ionic Solids As Cation-exchangerssupporting

confidence: 75%

“…Unique functions related to these cation-exchanged POM-based compounds are introduced, and future works arising from these functions are also discussed. For past developments on polyoxometalates as cation-exchangers, the readers are directed to a legendary review article 26…”

Section: Introductionmentioning

confidence: 99%

Frontiers and progress in cation-uptake and exchange chemistry of polyoxometalate-based compounds

Uchida

2019

Chem. Sci.

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“…However, the hexacyanoferrate of transition metals is generally too difficult to be separated from the solution due to its fine particulate nature which often create further problems of contamination and hence, needed to be incorporated into supporting materials [48] , but it is a highly selective agent with special cubic structure and channel diameter that allows only small hydrated ions such as cesium ions to permeate through and block the larger ones that compete for the sorption sites [49] . On the other hand, metal ferrocyanide sorbents were reported to have good structure, ion exchange ability for cesium from different types of solution such as natural waters and radioactive wastewater, stable in acidic and moderate alkaline medium, stable in radiation and high temperature [50][51][52][53][54][55][56][57] . However, adsorption by ferrocyanides sorbents have been reported to be strongly affected by preparation, difficult to handle for column application due to its fine nature [58,59] and results into large sludge production [60] .…”

Section: Inorganic 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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“…[6][7][8] However, unsupported AMP and CMP are rarely used for flow-through applications as their microcrystallinity leads to low flow rates and clogging. [9,10] Some researchers handled this problem through the dispersion of AMP on various supports such as Al 2 O 3 , [11] organic polymers, [12] and zirconium phosphate.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Ammonium Molybdophosphate/Al‐MCM‐41 Composite Material from Natural Clay and Its Use in Cesium Ion Adsorption

et al. 2015

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Ordered hexagonal mesoporous aluminosilicate matrix (Al-MCM-41) with incorporated ammonium molybdophosphate (AMP) was successfully synthesized by a one-pot synthesis method with natural clay from low-grade potash ores of Qinghai salt lake as the silica and aluminum source. We introduced a modified "liquid-phase transport" step, which allowed the use of impure natural clay as a starting material to directly produce pure product without sedimentation pretreatment. The resultant product was characterized by X-ray fluorescence (XRF) spectroscopy, FTIR spectroscopy, XRD,

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Synthetic inorganic ion exchangers—II Salts of heteropolyacids, insoluble ferrocyanides, synthetic aluminosilicates and miscellaneous exchangers

Cited by 140 publications

References 127 publications

Frontiers and progress in cation-uptake and exchange chemistry of polyoxometalate-based compounds

Frontiers and progress in cation-uptake and exchange chemistry of polyoxometalate-based compounds

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

Facile Preparation of Ammonium Molybdophosphate/Al‐MCM‐41 Composite Material from Natural Clay and Its Use in Cesium Ion Adsorption

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