Chemical speciation of environmentally significant metals with inorganic ligands. Part 4

The Cd2+ + OH-, Cl-, co3 2-, So4 2-, and Po4 3- systems (IUPAC technical report)

Kipton J. Powell, Paul L. Brown, Robert H. Byrne, T. Gajda, Glenn Hefter, Ann Kathrin Leuz, Staffan Sjöberg, Hans Wanner

Research output: Contribution to journalArticle

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Abstract

The numerical modeling of CdII speciation amongst the environmental inorganic ligands Cl-, OH-, CO3 2-, SO4 2-, and PO4 3- requires reliable values for the relevant stability (formation) constants. This paper compiles and provides a critical review of these constants and related thermodynamic data. It recommends values of log10 βp,q,r° valid at Im = 0 mol kg-1 and 25 °C (298.15 K), along with the equations and empirical reaction ion interaction coefficients, Δε, required to calculate log10 βp,q,r values at higher ionic strengths using the Brønsted-Guggenheim-Scatchard specific ion interaction theory (SIT). Values for the corresponding reaction enthalpies, ΔrH, are reported where available. Unfortunately, with the exception of the CdII-chlorido system and (at low ionic strengths) the CdII-sulfato system, the equilibrium reactions for the title systems are relatively poorly characterized.

Original languageEnglish
Pages (from-to)1163-1214
Number of pages52
JournalPure and Applied Chemistry
Volume83
Issue number5
DOIs
Publication statusPublished - 2011

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Chemical speciation
Ionic strength
Metals
Ligands
Ions
Enthalpy
Thermodynamics
hydroxide ion

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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Chemical speciation of environmentally significant metals with inorganic ligands. Part 4 : The Cd2+ + OH-, Cl-, co3 2-, So4 2-, and Po4 3- systems (IUPAC technical report). / Powell, Kipton J.; Brown, Paul L.; Byrne, Robert H.; Gajda, T.; Hefter, Glenn; Leuz, Ann Kathrin; Sjöberg, Staffan; Wanner, Hans.

In: Pure and Applied Chemistry, Vol. 83, No. 5, 2011, p. 1163-1214.

Research output: Contribution to journalArticle

Powell, Kipton J. ; Brown, Paul L. ; Byrne, Robert H. ; Gajda, T. ; Hefter, Glenn ; Leuz, Ann Kathrin ; Sjöberg, Staffan ; Wanner, Hans. / Chemical speciation of environmentally significant metals with inorganic ligands. Part 4 : The Cd2+ + OH-, Cl-, co3 2-, So4 2-, and Po4 3- systems (IUPAC technical report). In: Pure and Applied Chemistry. 2011 ; Vol. 83, No. 5. pp. 1163-1214.
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