Solubility Prediction for the Reciprocal Quaternary System (Li+, Mg2+//Cl-, SO42-–H2O) at 273.15 K Using Pitzer Ion-Interaction Model

Shi Qiang Wang; Ya Fei Guo; Tian Long Deng

doi:10.4028/www.scientific.net/AMR.549.437

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Solubility Prediction for the Reciprocal Quaternary System (Li⁺, Mg²⁺//Cl^-, SO₄^2-–H₂O) at 273.15 K Using Pitzer Ion-Interaction Model

Abstract:

Solubilities of the reciprocal quaternary system (Li⁺, Mg²⁺//Cl^-, SO₄^2-–H₂O) at 273.15K were calculated using Pitzer and its extended HW model. The values of the Pitzer single-salt parameters β⁽⁰⁾, β⁽¹⁾, β⁽²⁾ and C^φ for LiCl, MgCl₂, Li₂SO₄, and MgSO₄, the mixed ion-interaction parameters θ_Li,Mg, θ_Cl,SO4, ψ_Li,Mg,Cl, ψ_Li,Mg,SO4, ψ_Li,Cl,SO4 and ψ_Mg,Cl,SO4, and the Debye–Hückel parameter A^φ in the system at 273.15K were derived either temperature-dependent equation or through fitting solubility data of the ternary system by multiple linear regression method. Based on the Jänecke indexes, the phase diagram was plotted. This study affords the necessary parameters for solubility predictions of complicated systems and establishes a theoretical basis for the separation of these valuable minerals from salt lake brine.

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Periodical:

Advanced Materials Research (Volume 549)

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437-440

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.549.437

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Online since:

July 2012

Authors:

Shi Qiang Wang, Ya Fei Guo, Tian Long Deng

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Pitzer Ion-Interaction Model, Predictive Solubility, Salt Lake Brine, Theoretical Calculation

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