Thermodynamic Equilibrium Analysis on Mg2+-CO32--Ida2--H2O System

SU Mingru; DOU Aichun; LIU Shuai; LIU Tong; GAO Tian; PAN Jin; LIU Yunjian

doi:10.13779/j.cnki.issn1001-0076.2018.06.005

2018 Vol. 38, No. 6

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Article navigation > Conservation and Utilization of Mineral Resources > 2018 > (6): 24-30

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SU Mingru, DOU Aichun, LIU Shuai, LIU Tong, GAO Tian, PAN Jin, LIU Yunjian. Thermodynamic Equilibrium Analysis on Mg2+-CO32--Ida2--H2O System[J]. Conservation and Utilization of Mineral Resources, 2018, (6): 24-30. doi: 10.13779/j.cnki.issn1001-0076.2018.06.005

Citation:

SU Mingru, DOU Aichun, LIU Shuai, LIU Tong, GAO Tian, PAN Jin, LIU Yunjian. Thermodynamic Equilibrium Analysis on Mg²⁺-CO₃^2--Ida^2--H₂O System[J]. Conservation and Utilization of Mineral Resources, 2018, (6): 24-30. doi: 10.13779/j.cnki.issn1001-0076.2018.06.005

Thermodynamic Equilibrium Analysis on Mg²⁺-CO₃^2--Ida^2--H₂O System

School of material Science and Engineering, Jiangsu University, Zhenjiang 212013, China

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Corresponding author: DOU Aichun, smrr1987@163.com

Received Date: 07 May 2018

Publish Date: 25 December 2018

Abstract

Abstract

Thermodynamic behaviors of magnesium carbonate (MgCO₃) in iminodiacetate system were studied, and thermodynamic equilibrium equation was established. The theories of coordination chemistry was used to analysis the effect of the total concentration of Ida^2- and pH value on the total concentration of Mg²⁺ and the concentration of free Mg²⁺, Ida^2- and CO₃^2-. Species distribution of Mg²⁺ and Ida^2- was also discussed. The results show that the dissolution of MgCO₃ under acidic condition is acid dissolution, while the dissolution of MgCO₃ under alkaline condition is coordination reaction between Mg²⁺ and Ida^2-. However, the dissolution quantity of MgCO₃ is very low in alkaline system because the coordination ability of Mg²⁺ with Ida^2- is very weak.
- iminodiacetic acid /
- thermodynamics /
- MgCO₃

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