Thermochemical data (log K) for environmentally-relevant elements : 1. H, Na, K, Ca, Mg, Fe, Mn, U, A1, Pb, Zn, Cu and Cd with model fulvic acid (Aspartate, citrate, malonate, salicylate and tricarballyate)

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dc.contributor.authorMarkich, SJen_AU
dc.contributor.authorBrown, PLen_AU
dc.date.accessioned2007-11-22T04:19:32Zen_AU
dc.date.accessioned2010-04-30T04:29:57Zen_AU
dc.date.available2007-11-22T04:19:32Zen_AU
dc.date.available2010-04-30T04:29:57Zen_AU
dc.date.issued1999-12en_AU
dc.description.abstractThis study provides an extensive stability constant (log K) database suitable for calculating the speciation of selected environmentally-relevant elements (H Na K Ca Mg Fe Mn U Al Pb Zn Cu and Cd) in an aqueous system where a model fulvic acid (comprising aspartic citric malonic salicylic and tricarballylic acids) is used to simulate metal binding by dissolved organic material Stability constants for inorganic metal complexes and minerals were selected primarily from critical literature complications and/or reviews. In contrast few critically evaluated data were available for metal complexes with aspartic citric, malonic, salicylic and tricarballylic acids. Consequently, data from original research articles were carefully evaluated and compiled as part of the study, following defined selection criteria. To meet the objective of compiling a comprehensive and reliable database of stability constants, all relevant equilibria and species, ranging from simple binary metal complexes to more complex ternary, and even quaternary, metal complexes were included where possible. In addition to the selection of stability constants from empirical sources, estimates of stability constants were performed when this could be done reliably, based on the unified theory of metal ion complexation and/or linear free energy relationships. The stability constants are given as common logarithms (log10) in the form required by the HARPHRQ geochemical code and refer to the standard state, i.e. 298.15 k (25—C), 106 Pa (1 atm) and, for all species, infinite dilution (ionic strength = 0 moI L-1). In addition to the compilation of stability constant data, an overview is given of geochemical speciation modeling in aqueous systems and available conceptual models of metal binding by humic substances.en_AU
dc.identifier.citationMarkich, S. J. & Brown, P. L. (1999). Thermochemical data (log K) for environmentally-relevant elements : 1. H, Na, K, Ca, Mg, Fe, Mn, U, A1, Pb, Zn, Cu and Cd with model fulvic acid (Aspartate, citrate, malonate, salicylate and tricarballyate). Lucas Heights, N.S.W: Australian Nuclear Science and Technology Organisation, Lucas Heights Science and Technology Centre.en_AU
dc.identifier.govdoc193en_AU
dc.identifier.isbn0642599726en_AU
dc.identifier.issn10307746en_AU
dc.identifier.otherANSTO-E-735en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/335en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Nuclear Science and Technology Organisationen_AU
dc.subjectOrganic acidsen_AU
dc.subjectGeochemistryen_AU
dc.subjectComputer codesen_AU
dc.subjectStabilityen_AU
dc.titleThermochemical data (log K) for environmentally-relevant elements : 1. H, Na, K, Ca, Mg, Fe, Mn, U, A1, Pb, Zn, Cu and Cd with model fulvic acid (Aspartate, citrate, malonate, salicylate and tricarballyate)en_AU
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