Chemical speciation of environmentally significant metals with inorganic ligands Part 2: The Cu2+-OH-, Cl-, CO32-, SO42-, and PO43- systems (IUPAC Technical Report)

K.J. Powell; P.L. Brown; R.H. Byrne; T. Gajda; G. Hefter; S. Sjöberg; H. Wanner

doi:10.1351/pac200779050895

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Chemical speciation of environmentally significant metals with inorganic ligands Part 2: The Cu2+-OH-, Cl-, CO32-, SO42-, and PO43- systems (IUPAC Technical Report)

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Chemical speciation of environmentally significant metals with inorganic ligands Part 2: The Cu2+-OH-, Cl-, CO32-, SO42-, and PO43- systems (IUPAC Technical Report)

K.J. Powell, P.L. Brown, R.H. Byrne, T. Gajda, G. Hefter, S. Sjöberg and H. Wanner

Pure and Applied Chemistry, Vol.79(5), pp.895-950

2007

DOI: https://doi.org/10.1351/pac200779050895

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Abstract

Complex formation between CuII and the common environmental ligands Cl–, OH–, CO3 2–, SO4 2–, and PO4 3– can have a significant effect on CuII speciation in natural waters with low concentrations of organic matter. Copper(II) complexes are labile, so the CuII distribution amongst these inorganic ligands can be estimated by numerical modeling if reliable values for the relevant stability (formation) constants are available. This paper provides a critical review of such 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 specific ion interaction coefficients required to calculate log10 βp,q,r values at higher ionic strengths. Some values for reaction enthalpies, ΔrHm, are also reported where available. In weakly acidic fresh water systems, in the absence of organic ligands, CuII speciation is dominated by the species Cu2+(aq), with CuSO4(aq) as a minor species. In seawater, it is dominated by CuCO3(aq), with Cu(OH)+, Cu2+(aq), CuCl+, Cu(CO3)OH–, Cu(OH)2(aq), and Cu(CO3)2 2– as minor species. In weakly acidic saline systems, it is dominated by Cu2+(aq) and CuCl+, with CuSO4(aq) and CuCl2(aq) as minor species.

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Title: Chemical speciation of environmentally significant metals with inorganic ligands Part 2: The Cu2+-OH-, Cl-, CO32-, SO42-, and PO43- systems (IUPAC Technical Report)
Authors/Creators: K.J. Powell (Author/Creator) - University of Canterbury
P.L. Brown (Author/Creator) - Rio Tinto (Australia)
R.H. Byrne (Author/Creator) - University of South Florida St. Petersburg
T. Gajda (Author/Creator) - University of Debrecen
G. Hefter (Author/Creator) - Murdoch University
S. Sjöberg (Author/Creator) - Umeå University
H. Wanner (Author/Creator) - Swiss Federal Nuclear Safety Inspectorate
Publication Details: Pure and Applied Chemistry, Vol.79(5), pp.895-950
Publisher: International Union of Pure and Applied Chemistry
Identifiers: 991005543533907891
Murdoch Affiliation: School of Chemical and Mathematical Science
Language: English
Resource Type: Journal article

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Collaboration types: Industry collaboration; Domestic collaboration; International collaboration
Citation topics: 2 Chemistry; 2.89 Ionic, Molecular & Complex Liquids; 2.89.462 Excess Molar Volumes
Web Of Science research areas: Chemistry, Multidisciplinary
ESI research areas: Chemistry