Xenon-129 NMR spectrum of xenon in the .alpha.-cage of zeolite A during hydration and ion exchange

1993 ◽  
Vol 97 (16) ◽  
pp. 4124-4127 ◽  
Author(s):  
Ryong Ryoo ◽  
Louis Charles de Menorval ◽  
Ja Hun Kwak ◽  
Francois Figueras
Keyword(s):  
Ion Exchange ◽  
Zeolite A ◽  
Nmr Spectrum

Removal of Mg from spring water using natural clinoptilolite

Clay Minerals ◽  
2012 ◽  
Vol 47 (1) ◽  
pp. 81-92 ◽  
Author(s):  
S. Tomić ◽  
N. Rajić ◽  
J. Hrenović ◽  
D. Povrenović
Keyword(s):  
Ion Exchange ◽  
Kinetic Studies ◽  
Spring Water ◽  
Zeolite A ◽  
Zeolitic Tuff ◽  
Rate Limiting Step ◽  
Intra Particle Diffusion ◽  
Pseudo Second Order ◽  
Natural Clinoptilolite ◽  
Rate Limiting

AbstractNatural zeolitic tuff from Brus (Serbia) consisting mostly of clinoptilolite (about 90%) has been investigated for the reduction of the Mg concentration in spring water. The sorption capacity of the zeolite is relatively low (about 2.5 mg Mg g-1for the initial concentration of 100 mg Mg dm-3). The zeolitic tuff removes Mg from water solutions by ion exchange, which has been demonstrated by energy dispersive X-ray analysis (EDS). The extent of ion exchange was influenced by the pH and the initial Mg concentration. Kinetic studies revealed that Lagergen's pseudo-second order model was followed. Intra-particle diffusion of Mg2+influenced the ion exchange, but it is not the rate-limiting step. Rather than having to dispose of the Mg-loaded (waste) zeolite, a possible application was tested. Addition to a wastewater with a low concentration of Mg showed that it could successfully make up for the lack of Mg micronutrient and, accordingly, enabled the growth of phosphate-accumulating bacteriaA. Junii, increasing the amount of phosphate removed from the wastewater.

Ion Exchange Kinetics in Zeolite A

1985 ◽  
pp. 345-369 ◽  
Author(s):  
D. Drummond ◽  
A. Jonge ◽  
L. V. C. Rees
Keyword(s):  
Ion Exchange ◽  
Zeolite A ◽  
Ion Exchange Kinetics ◽  
Exchange Kinetics

Mössbauer spectroscopic studies of ferrous ion-exchange in zeolite A

Zeolites ◽  
1982 ◽  
Vol 2 (2) ◽  
pp. 72-78 ◽  
Author(s):  
Zi Gao ◽  
Lovat V.C. Rees
Keyword(s):  
Ion Exchange ◽  
Spectroscopic Studies ◽  
Ferrous Ion ◽  
Zeolite A

Divalent and trivalent ion exchange with zeolite A

1982 ◽  
Vol 16 (9) ◽  
pp. 617-624 ◽  
Author(s):  
Brandon H. Wiers ◽  
Robert J. Grosse ◽  
William A. Cilley
Keyword(s):  
Ion Exchange ◽  
Zeolite A

Mechanism of the fractionation of 7Li ions into aqueous solutions: ion-exchange with the six-membered oxygen ring of zeolite-A

2002 ◽  
Vol 5 (2) ◽  
pp. 415-422 ◽  
Author(s):  
Atsushi Ishikawa ◽  
Yuko Mizusawa ◽  
Shigeru Ishikawa ◽  
Akinobu Sasane ◽  
Yoshihiro Mori
Keyword(s):  
Ion Exchange ◽  
Aqueous Solutions ◽  
Zeolite A
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