Experimental determination of lead carbonate solubility at high ionic strengths: A Pitzer model description

Xiong, Yongliang

doi:10.1007/s00706-015-1483-y

Experimental determination of lead carbonate solubility at high ionic strengths: A Pitzer model description

Journal Article · Wed May 06 00:00:00 EDT 2015 · Monatshefte fuer Chemie

DOI:https://doi.org/10.1007/s00706-015-1483-y· OSTI ID:1235353

Xiong, Yongliang ^[1]

Sandia National Labs. (SNL), Carlsbad, NM (United States)

In this article, solubility measurements of lead carbonate, PbCO₃(cr), cerussite, as a function of total ionic strengths are conducted in the mixtures of NaCl and NaHCO₃ up to I = 1.2 mol•kg^–1 and in the mixtures of NaHCO₃ and Na₂CO₃ up to I = 5.2 mol•kg^–1, at room temperature (22.5 ± 0.5 °C). The solubility constant (log K_sp) for cerussite, PbCO₃(cr) = Pb²⁺ + CO₃^2- was determined as –13.76 ± 0.15 (2σ) with a set of Pitzer parameters describing the specific interactions of PbCO₃(aq), Pb(CO₃)₂^2-, and Pb(CO₃)Cl^– with the bulk-supporting electrolytes, based on the Pitzer model. The model developed in this work can reproduce the experimental results including model-independent solubility values from the literature over a wide range of ionic strengths with satisfactory accuracy. The model is expected to find applications in numerous fields, including the accurate description of chemical behavior of lead in geological repositories, the modeling of formation of oxidized Pb–Zn ore deposits, and the environmental remediation of lead contamination.

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Environmental Management (EM)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1235353

Alternate ID(s):: OSTI ID: 1496098

Report Number(s):: SAND--2015-0604J; 562486

Journal Information:: Monatshefte fuer Chemie, Journal Name: Monatshefte fuer Chemie Journal Issue: 9 Vol. 146; ISSN 0026-9247

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

References (12)

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Experimental determination of solubilities of lead oxalate (PbC2O4(cr)) in a NaCl medium to high ionic strengths, and the importance of lead oxalate in low temperature environments Xiong, Yongliang; Kirkes, Leslie; Westfall, Terry Chemical Geology, Vol. 342 https://doi.org/10.1016/j.chemgeo.2013.01.012	journal	March 2013
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Cited By (2)

Experimental Determination of Solubilities of Brucite [Mg(OH)2(cr)] in Na2SO4 Solutions with Borate to High Ionic Strengths: Interactions of MgB(OH) 4 + with Na2SO4 Xiong, Yongliang; Kirkes, Leslie; Westfall, Terry Journal of Solution Chemistry, Vol. 47, Issue 4 https://doi.org/10.1007/s10953-018-0742-z	journal	April 2018
A Pitzer Model for Lead Oxide Solubilities in the Presence of Borate to High Ionic Strength Xiong, Yongliang; Kirkes, Leslie; Westfall, Terry Journal of Solution Chemistry, Vol. 47, Issue 12 https://doi.org/10.1007/s10953-018-0835-8	journal	November 2018

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
cerussite
lead contamination remediation
nuclear waste management
oxidized lead-zinc ore deposits
solution chemistry
waste isolation pilot plant

Experimental determination of lead carbonate solubility at high ionic strengths: A Pitzer model description

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References (12)

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