Characterization and ion-exchange behavior of thermally stable nano-composite polyaniline zirconium titanium phosphate: Its analytical application in separation of toxic metals

Desalination ◽  
2011 ◽  
Vol 265 (1-3) ◽  
pp. 242-254 ◽  
Author(s):  
Asif Ali Khan ◽  
Leena Paquiza
1981 ◽  
Vol 54 (3) ◽  
pp. 749-753 ◽  
Author(s):  
Isao Tomita ◽  
Kenkichi Iwase ◽  
Kazuhiko Saito ◽  
Yoshiyuki Sugiyama

1979 ◽  
Vol 52 (10) ◽  
pp. 2923-2927 ◽  
Author(s):  
Yutaka Yazawa ◽  
Toru Eguchi ◽  
Kazunori Takaguchi ◽  
Isao Tomita

2007 ◽  
Vol 72 (9) ◽  
pp. 1306-1318 ◽  
Author(s):  
Rakesh P. Thakkar ◽  
Uma V. Chudasama

A mixed material of the class of tetravalent bimetallic acid (TBMA) salt - zirconium titanium phosphate (ZTP) - has been synthesized by the sol-gel technique. ZTP has been characterized by elemental analysis, thermal analysis (TGA, DTA), FTIR, X-ray diffraction and SEM. Ion exchange capacity (IEC) of the material has been determined and the effect of calcination (373-773 K) on IEC studied and chemical stability of the material in various media (acids, bases and organic solvents) assessed. Further, the equilibrium exchange of H in ZTP for Mg2+, Ca2+, Sr2+ and Ba2+ ions has been studied at 303, 313, 323 and 333 K at constant ionic strength. On the basis of the exchange isotherms, various thermodynamic parameters such as equilibrium constant (K), standard gibbs energy change (∆Go), entropy change (∆So) and enthalpy change (∆Ho) have been calculated. The parameters were correlated with the ion exchange characteristics of the material.


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