A model for ion-exchange behaviour of polyampholytic resins: Using polystyrene polyampholytic latex

The exchange behaviour of some divalent transition metal ions M2+ (Zn2+, Cu2+, Ni2+, Co2+, Mn2+) in a zeolite NaX (SiO2/Al2O3 2.75) was studied at intermediate stages before equilibrium. The equivalent counter ion supply in the solution, given by the equivalent ratio of the two counter ions 2M2+/Na+, was found to be critical in determining the saturation level of exchange. The series of relative abilities of exchange was very similar to the well known selectivity series at equilibrium. It is suggested that water exchange of the metal ions in solution could be one of the factors controlling the relative ease of ion exchange.

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Ion-exchange behaviour of hydrous zirconia in mixed solvents: Capacity and kinetics of exchange

Journal of Chemical Technology and Biotechnology ◽

10.1002/jctb.5030320706 ◽

2007 ◽

Vol 32 (7-12) ◽

pp. 709-716 ◽

Cited By ~ 11

Author(s):

N. Z. Misak ◽

H. F. Ghoneimy

Keyword(s):

Ion Exchange ◽

Mixed Solvents ◽

Hydrous Zirconia ◽

Kinetics Of ◽

Exchange Behaviour

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Ion-exchange behaviour of copper ferricyanide

Journal of Radioanalytical Chemistry ◽

10.1007/bf02519977 ◽

1982 ◽

Vol 75 (1-2) ◽

pp. 85-95 ◽

Cited By ~ 14

Author(s):

Ajay K. Jain ◽

Raj Pal Singh ◽

Chand Bala

Keyword(s):

Ion Exchange ◽

Exchange Behaviour

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The Ion-exchange Behaviour of Beryllium Salicylate Complexes

Australian Journal of Chemistry ◽

10.1071/ch9630376 ◽

1963 ◽

Vol 16 (3) ◽

pp. 376

Author(s):

HJ de Bruin ◽

JJ Fardy ◽

RB Temple

Keyword(s):

Ionic Strength ◽

Ion Exchange ◽

Stability Constants ◽

Conditional Stability ◽

Conditional Stability Constants ◽

Exchange Behaviour ◽

Chelate Rings

The beryllium/salicylate system has been re-examined by ion-exchange procedures. The results appear to confirm the existence of a neutral 1 : 1 and an anionic 1 : 2 complex, in both of which the salicylate radicals form chelate rings. Conditional stability constants have been measured at 25�C at an ionic strength of 0.15, the values obtained being �� β1 = 4.97 x 1012, and β2 = 2.63 x 1022.

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