Use of Pitzer's equations to determine the media effect on the formation of lead chloro complexes

Frank J Millero, Robert H. Byrne

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The spectrophotometric measurements of chloro complexes of lead in aqueous HCl, NaCl, MgCl2 and CaCl2 solutions at 25°C have been analyzed using Pitzer's specific interaction equations. Parameters for activity coefficients of the complexes PbCl+, PbCl2 0 and PbCl3 - have been determined for the various media. Values of K1 = 30.0 ± 0.6, K2 = 106.7 ± 2.1 and K3 = 73.0 ± 1.5 were obtained for the cumulative formation constants. [Pb2+ + nCl- → PbCln 2-n)]. These values are in reasonable agreement with literature data. The Pitzer parameters for the PbCl ion pairs in various media were used to calculate the speciation of Pb2+ in an artificial seawater solution.

Original languageEnglish (US)
Pages (from-to)1145-1150
Number of pages6
JournalGeochimica et Cosmochimica Acta
Volume48
Issue number5
DOIs
StatePublished - 1984

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Magnesium Chloride
activity coefficient
Activity coefficients
Seawater
Ions
seawater
ion
Lead
effect
parameter

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Use of Pitzer's equations to determine the media effect on the formation of lead chloro complexes. / Millero, Frank J; Byrne, Robert H.

In: Geochimica et Cosmochimica Acta, Vol. 48, No. 5, 1984, p. 1145-1150.

Research output: Contribution to journalArticle

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