The ion-exchange properties of zeolites. II. Ion exchange in the synthetic zeolite Linde 4A

Sherry, Howard S.; Walton, Harold F.

doi:10.1021/j100864a042

Cited by 121 publications

(39 citation statements)

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“…The residual Na + content, ranging between 0.14 and 0.23 meq g −1 , which appears not further exchangeable, involves the possible presence of some NaAlO 2 occluded in the ␤-cages of the zeolite framework, as frequently reported by literature. 23,24 It must be noticed that the differences recorded in the residual Na content of various samples appear within the experimental error which means that, in practice, the various samples exhibit the same residual Na content.…”

Section: Methodsmentioning

confidence: 90%

Sintering behaviour of celsian based ceramics obtained from the thermal conversion of (Ba, Sr)-exchanged zeolite A

Marocco

Liguori

Dell’Agli

et al. 2011

Journal of the European Ceramic Society

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Section: Methodsmentioning

confidence: 90%

Sintering behaviour of celsian based ceramics obtained from the thermal conversion of (Ba, Sr)-exchanged zeolite A

Marocco

Liguori

Dell’Agli

et al. 2011

Journal of the European Ceramic Society

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“…The ion-exchange properties of many common synthetic zeolites such as NaX, NaY, and NaA were thoroughly examined in the past, mainly because of their wide utilization in detergents and ammonium exchangers (Sherry and Walton, 1967;Barrer et al, 1968aBarrer et al, , 1968bGal et al, 1971;Maes and Cremers, 1975;Townsend, 1981, 1982;Wiers et al, 1982;and many others). The use of zeolites in wastewater purification offers the advantage of a highly improved cation-exchange performance relative to natural counterparts.…”

Section: Introductionmentioning

confidence: 99%

Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions

Moirou

Vaxevanidou

Christidis

et al. 2000

Clays and clay miner.

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Abstract--This paper examines the ion-exchange properties of synthetic zeolite Na-P0, which was produced from perlite-waste fines and has a SiO2:A1203 ratio of 4.45:1 and a cation-exchange capacity (CEC) of 3.95 meq g ~. Although equilibrium is attained rapidly for all three metals, exchange is incomplete, with At(max) (maximum equilibrium fraction of the metal in the zeolite) being 0.95 for Pb, 0.76 for Zn, and 0.27 for Ni. In both Na ~ 89 and Na --* 89 exchange, the normalized selectivity coefficient is virtually constant for :~A~ (normalized equilibrium fraction of the metal in the zeolite) values of --<0.6, suggesting a pronounced homogeneity of the available exchange sites. The Gibbs standard free energy, AG ~ of the Na ---) 89 exchange calculated from the normalized selectivity coefficient is -3.11 kJ eq and, for the Na ~ 1/2Zn exchange, it is 2.75 kJ eq ~.Examination of the solid exchange products with X-ray diffraction (XRD) revealed a possible decrease in crystallinity of zeolite Pb-Pc as suggested by the significant broadening and disappearance of diffraction lines. This decrease is associated with a reduction of pore opening, as indicated from Fourier-transform infrared analysis (FTIR), which in turn results in a decrease of the amount of zeolitic water. Thermogravimetric-differential thermogravimetric (TG-DTG) analysis showed that water loss occurs in three steps, the relative significance of which depends on the type of exchangeable cation and subsequently on the type of complex formed with the cation and/or the zeolite channels. Zeolite Na-P c might be utilized in environmental applications, such as the treatment of acid-mine drainage and electroplating effluents.

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“…For Eq. Further, the corrected selectivity coefficient may be written ( 5 ) To find the thermodynamic equilibrium constants for the exchange reactions, theoretical studies have been made by Gregor'*', BonneP and Gaines & Thomas(4'. Application of the Gibbs-Duhem equation leads to the following relationships for the ion-exchange reaction represented by Eq.…”

Section: Theoretical Treatment 1 Treatment Of Ion-exchange Equimentioning

confidence: 99%

Studies on Ion-Exchange Equilibria for Cesium-Hydrogen System

Hagiwara

Shinada

1970

Journal of Nuclear Science and Technology

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Ion-exchange equilibrium between Cs and H on a sulfonated polystyrene resin of Dowex 50W with 8:; crosslinking has been studied over a temperature range of 25" to 60°C, using I3'Cs as radioactive tracer; the various experimental data related to the equilibrium experiments were examined in detail by several different methods; a new treatment to take into account the water uptake in the exchange system Cs-H was also applied with the aid of a radioactive tracer technique. The thermodynamic equilibrium constant K g determined by the present study compares well with the values calculated indirectly from experimental data found by other investigators. Data are also given for the heats, free energies and entropies of the exchange reaction involving Dowex 50W. Fairly good results have been obtained on the exchange of Cs and H.

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The ion-exchange properties of zeolites. II. Ion exchange in the synthetic zeolite Linde 4A

Cited by 121 publications

References 0 publications

Sintering behaviour of celsian based ceramics obtained from the thermal conversion of (Ba, Sr)-exchanged zeolite A

Sintering behaviour of celsian based ceramics obtained from the thermal conversion of (Ba, Sr)-exchanged zeolite A

Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions

Studies on Ion-Exchange Equilibria for Cesium-Hydrogen System

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The ion-exchange properties of zeolites. II. Ion exchange in the synthetic zeolite Linde 4A

Cited by 121 publications

References 0 publications

Sintering behaviour of celsian based ceramics obtained from the thermal conversion of (Ba, Sr)-exchanged zeolite A

Sintering behaviour of celsian based ceramics obtained from the thermal conversion of (Ba, Sr)-exchanged zeolite A

Ion Exchange of Zeolite Na-Pc with Pb2+, Zn2+, and Ni2+ Ions

Studies on Ion-Exchange Equilibria for Cesium-Hydrogen System

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Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions