The ion-exchange equilibria of various divalent transition metal ion (Co2+, Zn2+, Cd2+ and Cu2+)/K+ systems have been studied over the temperature range 30–60°C on zirconium(IV) iodophosphate (ZIP). The exchange isotherms were constructed by means of a batch technique for M(NO3)2/KNO3 media of 0.01 mol/kg ionic strength, where M = Co2+, Zn2+, Cd2+ or Cu2+. The selectivity sequence was determined as Co2+ < Zn2+ < Cd2+ < Cu2+. Thermodynamic equilibrium constants and values of ΔG0, ΔS0 and ΔH0 were evaluated for the exchange process.
References
1.
AbeM.SudohK. (1980) J. Inorg. Nucl. Chem.42, 1051.
2.
AlbertiG.ConstantinoU. (1974) J. Inorg. Nucl. Chem.36, 653.
3.
AmphlettC.B.BatonP.McDonaldL.A. (1964) J. Inorg. Nucl. Chem.26, 297.
4.
BarrerR.M.TownsendR.P. (1976) J. Chem. Soc., Faraday Trans. 272, 661.
5.
DyerA.ShaheenT.ZaminM. (1997) J. Mater. Chem.7, 1895.
6.
FreiserH.FernandoQ. (1966) Ionic Equilibria in Analytical Chemistry, Wiley, New York.
7.
GainsG.L.Jr.ThomasH.C. (1953) J. Chem. Phys.21, 714.
8.
KentaO.AbeM. (1996) Solv. Extr. Ion Exch.14, 1137.
9.
LarsenE.M.VissarsD.R. (1960) J. Chem. Phys.64, 1732.
10.
ManovG.G.BatesR.G.HamerW.J.AcreeS.F. (1943) J. Am. Chem. Soc.65, 1765.
11.
NabiS.A.UsmaniS.RahmanN. (1996) Ann. Chim. (Paris)21, 521.
12.
RosseinskyD.R. (1965) Chem. Rev.65, 467.
13.
TanakaY.TsujiM. (1997a) Mater. Res. Bull.32, 461.
14.
TanakaY.TsujiM. (1997b) Solv. Extr. Ion Exch.15, 709.
