scholarly journals Estimation of the Pitzer Parameters for 1–1, 2–1, 3–1, 4–1, and 2–2 Single Electrolytes at 25 °C

2016 ◽  
Vol 61 (7) ◽  
pp. 2536-2554 ◽  
Author(s):  
Marcus C. Simoes ◽  
Kevin J. Hughes ◽  
Derek B. Ingham ◽  
Lin Ma ◽  
Mohamed Pourkashanian
Keyword(s):  
Pitzer Parameters

Determination of Pitzer Parameters for Ferric Nitrate from Freezing Point and Solubility of Ice

2015 ◽  
Vol 61 (1) ◽  
pp. 674-678 ◽  
Author(s):  
Mouad Arrad ◽  
Mohammed Kaddami ◽  
Hannu Sippola ◽  
Pekka Taskinen
Keyword(s):  
Freezing Point ◽  
Ferric Nitrate ◽  
Pitzer Parameters

scholarly journals Determination of Pitzer Parameters for Sodium Benzoate at 298.15 K

2001 ◽  
Vol 19 (1) ◽  
pp. 73-82 ◽  
Author(s):  
A J G Mendonça ◽  
M M Vaz ◽  
M I A Ferra
Keyword(s):  
Sodium Benzoate ◽  
Pitzer Parameters

Thermodynamics of the PuO2+-Na+-OH--Cl--ClO4--H2O system: use of NpO2+ Pitzer parameters for PuO2+

2001 ◽  
Vol 89 (8) ◽  
Author(s):  
Dhanpat Rai ◽  
Dean A. Moore ◽  
Andrew R. Felmy ◽  
Gregory R. Choppin ◽  
Robert C. Moore
Keyword(s):  
Thermodynamic Data ◽  
Aqueous Systems ◽  
System Use ◽  
Pitzer Parameters

Obtaining reliable thermodynamic data for Pu(V) is difficult because of its redox and/or disproportionation reactions in most aqueous systems. The known stability of Pu(V) in PuO

Aqueous and Surface Chemistry of Calcium - Metal Hydroxides in High pH Environments

1996 ◽  
Vol 432 ◽  
Author(s):  
David L. Cocke ◽  
M. Yousuf ◽  
A. Mollah ◽  
Thomas R. Hess ◽  
Tien-Chih Lin
Keyword(s):  
Water System ◽  
Empirical Method ◽  
Ion Concentration ◽  
Early Hydration ◽  
High Ph ◽  
Sequential Structure ◽  
Zinc Cadmium ◽  
Pitzer Parameters ◽  
Calcium Metal ◽  
Cadmium And Lead

AbstractMixed hydroxides of calcium, zinc, cadmium and lead have been recently identified in the high pH environments of hydrating cement. FTIR, XRD, SEM, and SPM have been used to characterize these systems. A chemical equilibrium model of the early hydration of a zinc-doped cement/water system, Na-K-Ca-Zn-H-SO4-OH-Zn(OH)2-Zn(OH)3-Zn(OH)4-H2O, has been developed to better understand the mechanism of the surface formation of calcium hydroxyzincate (CHZ). The model is based on Pitzer's semi-empirical method for calculation of ion-activity coefficients at high ionic strength. The Pitzer parameters for Na+-Zn2+,Na+-Zn2+- and have been evaluated, and the results successfully predict the equilibria (solubilities) of Na2SO4-ZnSO4-H2O, NaOH-Zn(OH)2-H2O and KOH-ZnO-H2O systems. The chemical model clearly demonstrates that the formation of CHZ on the calcium-silicahydrate (C-S-H) surface is critically controlled by the Ca2+ ion concentration as well as pH of the pore water system. The results of this study suggest that the growth of CHZ is preceded by surface complex formation. Sequential charge control and sequential structure development have been used to discuss the surface selectivity of these compounds and their control of cement hydration.

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