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Journal Articles Metallurgical and Materials Transactions B Year : 1991

Representation of the solubility of lead chloride in various chloride solutions with Pitzer’s model

A. Mgaidi
  • Function : Author
Walter Fürst
H. Renon
  • Function : Author

Abstract

A modified Pitzer's model[6] has been applied to the representation of the activities of various species in chloride solutions of lead (II). The parameters associated with the representation were the formation constants of four lead chlorocomplexes as well as Pitzer's interaction parameters. [7] They were determined by treatment of a data base composed of experimental solubilities of lead in NaCl, NH4Cl, and HCl solutions at 25-degrees-C. The root mean square (rms) relative deviations obtained for the representation of the experimental solubilities were 7.8 pct, 5.6 pct, and 5.6 pct for the three systems, respectively. The extension of the model to solubilities in a NaClO4-NaCl solution at an apparent ionic strength of 4 mol/kg water gives a rms relative deviation of 8.9 pct if one parameter involving the perchlorate anion is adjusted. A data treatment of experimental solubilities at other temperatures (from 13-degrees-C to 100-degrees-C) for the systems PbCl2-NaCl-H2O and PbCl2-NH4Cl-H2O has been made to determine the temperature derivatives of Pitzer's parameters involving complexed ions as well as the variation of solubility and complexation constants with temperature. The resulting rms relative deviation is 9.8 pct.

Dates and versions

hal-01212224 , version 1 (06-10-2015)

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A. Mgaidi, Walter Fürst, H. Renon. Representation of the solubility of lead chloride in various chloride solutions with Pitzer’s model. Metallurgical and Materials Transactions B, 1991, 22 (4), ⟨10.1007/BF02654287⟩. ⟨hal-01212224⟩

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