scholarly journals Comparative Study of Uni-Univalent H+/Na+ and Uni-Bivalent H+/Ca2+ Ion Exchange Reactions Using Nuclear Grade Resin Indion-223

2014 ◽  
Vol 33 ◽  
pp. 127-135
Author(s):  
Pravin U. Singare ◽  
Akmal L. Khan Mohammed ◽  
N.N. Dixit
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Equilibrium Constants ◽  
Nuclear Grade ◽  
Exchange Equilibrium ◽  
Exchange Reactions ◽  
Equilibrium Studies ◽  
Ion Exchange Reaction

The present paper deals with the ion exchange equilibrium studies of uni-univalent and uni-bivalent ion exchange reactions using nuclear grade anion exchange resin Indion-223 in H+ form towards Na+ and Ca2+ ions in the solution. It was observed that with rise in temperature the equilibrium constants K values for H+/Na+ uni-univalet ion exchange reaction increases from 0.01389 to 0.01855. Similarly for H+/Ca2+ uni-bivalet ion exchange reaction the equilibrium constants K values increases from 0.000397 to 0.000639. The increase in equilibrium constant values with rise in temperature indicate endothermic ion exchange reactions having the enthalpy change values of 25.55 and 38.92 kJ/ mol respectively.

scholarly journals Thermodynamics of Uni-Univalent H+/K+ and Uni-Bivalent H+/Ca2+ Ion Exchange Reactions Using Nuclear Grade Resin Indion-223

2014 ◽  
Vol 33 ◽  
pp. 190-198
Author(s):  
Pravin U. Singare ◽  
Akmal L. Khan Mohammed ◽  
N.N. Dixit
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Equilibrium Constants ◽  
Ionic Species ◽  
Nuclear Grade ◽  
Exchange Reactions ◽  
Efficient Separation ◽  
Ion Exchange Reaction

The present paper deals with the thermodynamic of uni-univalent and uni-bivalent ion exchange reactions using nuclear grade anion exchange resin Indion-223. It was observed that with rise in temperature the equilibrium constants K values for H+/K+ uni-univalet ion exchange reaction increases from 0.01710 to 0.02374. Similarly for H+/Ca2+ uni-bivalet ion exchange reaction the equilibrium constants K values increases from 0.000397 to 0.000639. The increase in K values with rise in temperature for both the reactions indicates its endothermic nature having the enthalpy change values of 22.72 and 38.92 kJ/ mol respectively. The technique used here can be extended further to standardise the process parameters in order to bring about the efficient separation of the desired ionic species from the solution

scholarly journals Study on Halide Ions Selectivity of Nuclear Grade Anion Exchange Resin Auchlite ARA-9366

2014 ◽  
Vol 30 ◽  
pp. 67-73
Author(s):  
P.U. Singare ◽  
A.N. Patange
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Equilibrium Constants ◽  
Nuclear Grade ◽  
Exchange Reactions ◽  
Ion Exchange Reaction ◽  
Bromide Ions

The selectivity behaviour of nuclear grade anion exchange resin Auchlite ARA-9366 in chloride form towards iodide and bromide ions in the solution was studied. The trend in selectivity of the resin was predicted on the basis of thermodynamics of Clˉ/Iˉ and Clˉ/Brˉ uni-univalent ion exchange reactions. It was observed that the equilibrium constants K values for Clˉ/Iˉ ion exchange reaction were higher than that calculated for Clˉ/Brˉ exchange under identical experimental conditions. Also the enthalpy values for the two uni-univalent ion exchange reactions were calculated as -47.87 and -36.14 kJ/mol respectively. The high K and low enthalpy values obtained for Clˉ/Iˉ ion exchange reaction as compared to that obtained during Clˉ/Brˉ exchange supports higher selectivity of the resin towards iodide ions as compared to that towards bromide ions, when both the ions are present in the same solution.

scholarly journals Ion Exchange Equilibrium Studies of Uni-Univalent H+/Na+ and Uni-Bivalent H+/Mg2+ Ion Exchange Reactions Using Nuclear Grade Resin Indion-223

2014 ◽  
Vol 33 ◽  
pp. 199-207
Author(s):  
Pravin U. Singare ◽  
Akmal L. Khan Mohammed ◽  
N.N. Dixit
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Equilibrium Constants ◽  
Ionic Species ◽  
Nuclear Grade ◽  
Exchange Equilibrium ◽  
Exchange Reactions ◽  
Equilibrium Studies ◽  
Ion Exchange Reaction ◽  
Selection Of

In the present investigation the uni-univalent and uni-bivalent ion exchange reactions were studied using nuclear grade anion exchange resin Indion-223 in H+ form. It was observed that for H+/Na+ uni-univalet ion exchange reaction, with rise in temperature the equilibrium constants K values increases from 0.01389 to 0.01855. Similarly increase in K values was observed from 0.000177 to 0.000333 for H+/Mg2+ uni-bivalet ion exchange reaction. The increase in equilibrium constant values with rise in temperature indicate endothermic ion exchange reactions having the enthalpy change values of 25.55 and 51.46 kJ/ mol respectively. It is expected that the present study will provide valuable information in order to decide about the selection of those resins for efficient separation of various ionic species present in the industrial waste water effluents.

scholarly journals Study on Halide Ions Selectivity of Industrial Grade Anion Exchange Resin Auchlite A-378

2014 ◽  
Vol 30 ◽  
pp. 44-50 ◽  
Author(s):  
P.U. Singare ◽  
A.N. Patange
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Equilibrium Constants ◽  
Exchange Reactions ◽  
Ion Exchange Reaction ◽  
Industrial Grade ◽  
Bromide Ions

The thermodynamic approach was applied to predict the trend selectivity of industrial grade anion exchange resin Auchlite A-378 in chloride form towards iodide and bromide ions in the solution. The study was conducted by performing the Clˉ/Iˉ and Clˉ/Brˉ uni-univalent ion exchange reactions under gradually increasing temperature conditions. The thermodynamic equilibrium constants K values were used to calculate the enthalpies of the two uni-univalent ion exchange reactions. It was observed that the K values for Clˉ/Iˉ ion exchange reaction were higher than Clˉ/Brˉ exchange reaction under identical experimental conditions. Also the enthalpy values for the two uni-univalent ion exchange reactions were calculated as -39.51 and -18.38 kJ/mol respectively. The high K and low enthalpy values obtained for Clˉ/Iˉ ion exchange reaction is responsible for higher selectivity of the resin towards iodide ions as compared to that towards bromide ions, when both the ions are present in the same solution.

scholarly journals Study of Uni-Univalent H+/K+ and Uni-Bivalent H+/Mg2+ Ion Exchange Reactions Using Nuclear Grade Resin Indion-223

2014 ◽  
Vol 33 ◽  
pp. 231-239
Author(s):  
Pravin U. Singare ◽  
Akmal L. Khan Mohammed ◽  
N.N. Dixit
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Ionic Species ◽  
Nuclear Grade ◽  
Exchange Reactions ◽  
Process Industries ◽  
Efficient Separation ◽  
Exchange Resins ◽  
Selection Of

In the present paper the uni-univalent and uni-bivalent ion exchange reactions were investigated using nuclear grade anion exchange resin Indion-223 in H+ form. For both H+/K+ uni-univalet ion exchange reactions and H+/Mg2+ uni-bivalet ion exchange reactions, the equilibrium constant K values increases from 0.01710 to 0.02374 and from 0.000177 to 0.000333 respectively as the reaction temperature rises from 35.0 °C to 45.0 °C. The increase in K values with temperature suggest endothermic ion exchange reactions having the enthalpy change values of 22.72 and 51.46 kJ/ mol respectively. The results of such studies will help in selection of suitable ion exchange resins in order to bring about efficient separation of different ionic species present in the waste water effluents released from nuclear as well as chemical process industries.

Tailoring the photocatalytic activity of layered perovskites by opening the interlayer vacancy via ion-exchange reactions

CrystEngComm ◽  
2015 ◽  
Vol 17 (45) ◽  
pp. 8703-8709 ◽  
Author(s):  
Yingqi Wang ◽  
Xiaofang Lai ◽  
Xujie Lü ◽  
Yanting Li ◽  
Qinglong Liu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Ion Exchange ◽  
Exchange Reaction ◽  
Underlying Mechanism ◽  
Effective Model ◽  
Layered Perovskite ◽  
Exchange Reactions ◽  
Ion Exchange Reaction ◽  
Improved Performance ◽  
Layered Perovskites

The photocatalytic activity of the layered perovskite K2La2Ti3O10 was regulated by an ion-exchange reaction with a series of cations – Ca2+, Sr2+, and Ba2+. The underlying mechanism of the improved performance and an effective model for designing the photocatalyst were discussed.

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