Specificity for alkali and alkaline earth cations of synthetic and natural organic complexing agents in membranes

2005 ◽  
pp. 113-160 ◽  
Author(s):  
W. Simon ◽  
W. E. Morf ◽  
P. Ch. Meier
Keyword(s):  
Alkaline Earth ◽  
Complexing Agents ◽  
Alkaline Earth Cations

Transport of alkali and alkaline earth cations by a crown ether-alkylphosphoric acid system

1993 ◽  
Vol 2 (4) ◽  
pp. 295-299 ◽  
Author(s):  
Toshio Takahashi ◽  
Yoichi Habata ◽  
Tetsuyuki Okumachi
Keyword(s):  
Crown Ether ◽  
Alkaline Earth ◽  
Acid System ◽  
Alkylphosphoric Acid ◽  
Alkaline Earth Cations

Driving force for the hydration of the swelling clays: Case of montmorillonites saturated with alkaline-earth cations

2013 ◽  
Vol 395 ◽  
pp. 269-276 ◽  
Author(s):  
Fabrice Salles ◽  
Jean-Marc Douillard ◽  
Olivier Bildstein ◽  
Cedric Gaudin ◽  
Benedicte Prelot ◽  
...  
Keyword(s):  
Driving Force ◽  
Alkaline Earth ◽  
Swelling Clays ◽  
Alkaline Earth Cations

Topotactic route to synthesis of novel hydroxylated phases: I. Trioctahedral Micas

Clay Minerals ◽  
1986 ◽  
Vol 21 (2) ◽  
pp. 125-131 ◽  
Author(s):  
S. Komarneni ◽  
R. Roy
Keyword(s):  
Ion Exchange ◽  
Alkaline Earth ◽  
Water Molecules ◽  
Hydration Energy ◽  
Hydrothermal Conditions ◽  
Potential Applications ◽  
Clay Layers ◽  
First Time ◽  
Hydrolysis Of ◽  
Alkaline Earth Cations

AbstractK-depleted phlogopite mica was used as a topotactic precursor and treated with alkali (Li+, K+, , Rb+, Cs+), alkaline-earth (Mg2+, Ca2+, Sr2+, Ba2+) and trivalent (Al3+) cations under hydrothermal conditions of 200°C and 30 MPa pressure. K-, NH4-, Rb- and Cs-aluminosilicate micas were synthesised at 200°C in one day. The synthesis of Cs-aluminosilicate mica, with potential applications in the management of nuclear wastes, has been achieved for the first time by this approach. Ion exchange by Li+, Na+ and alkaline-earth cations under hydrothermal conditions did not produce anhydrous mica phases but resulted in hydrous phases with one or two layers of water molecules between the clay layers. The formation of hydrous phases may be attributed to the high hydration energy of the above cations compared to K+, , RB+ and Cs+. Ion exchange with Al3+ produced a chlorite-like phase because of the hydrolysis of Al3+ under these hydrothermal conditions. These studies are of relevance in the immobilization of wastes where hazardous ions can be fixed in highly stable insoluble phases like mica or chlorite.

Spectrophotometric study of the complexation reactions between alkaline earth cations and murexide in some non-aqueous solutions

Polyhedron ◽  
1988 ◽  
Vol 7 (14) ◽  
pp. 1227-1230 ◽  
Author(s):  
Soheila Kashanian ◽  
Mohammad Bagher Gholivand ◽  
Siavash Madaeni ◽  
Alireza Nikrahi ◽  
Mojtaba Shamsipur
Keyword(s):  
Aqueous Solutions ◽  
Alkaline Earth ◽  
Spectrophotometric Study ◽  
Complexation Reactions ◽  
Alkaline Earth Cations
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