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Simulation of the precipitation of calcium phosphates, sulfates, and carbonates from aqueous solutions of complex composition

  • Physicochemical Analysis of Inorganic Systems
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Abstract

The isothermal evaporation of aqueous solutions containing calcium, magnesium, and sodium carbonates, phosphates, sulfates, and chlorides was studied by physiochemical simulation methods. The equilibrium composition of the Ca(HCO3)2-Mg(HCO)2-H3PO4-H2SO4-NaCl-CO2-H2O system was calculated for T = 25°C, pCO2 = 10−1 − 103 Pa, pH 7.7–9.4, solution concentration factors of 1–10, H2SO4 concentrations of 10−4−9 × 10−4 mol/(kg H2O), an H3PO4 concentration of 2 × 10−5 mol/(kg H2O), and a NaCl concentration of 10−3 mol/(kg H2O). Conditions were determined for calcium precipitation as calcite, dolomite, gypsum, and hydroxylapatite. The results of simulation were used in the development of commercial-scale methods for stabilizing cooling solutions in circulating water supply systems.

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia

    N. V. Kochetkova, N. B. Gavrilov, O. A. Noskova & V. A. Krenev

Authors
  1. N. V. Kochetkova
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  2. N. B. Gavrilov
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  3. O. A. Noskova
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  4. V. A. Krenev
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Additional information

Original Russian Text © N.V. Kochetkova, N.B. Gavrilov, O.A. Noskova, V.A. Krenev, 2008, published in Zhurnal Neorganicheskoi Khimii, 2008, Vol. 53, No. 4, pp. 673–679.

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Kochetkova, N.V., Gavrilov, N.B., Noskova, O.A. et al. Simulation of the precipitation of calcium phosphates, sulfates, and carbonates from aqueous solutions of complex composition. Russ. J. Inorg. Chem. 53, 617–623 (2008). https://doi.org/10.1134/S0036023608040220

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  • DOI: https://doi.org/10.1134/S0036023608040220

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