Non-equilibrium thermodynamic model for calcium carbonate supersaturated solutions of high salinity

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• 作者：Martina Costa Reis ; Maria de Fátima Brito Sousa…
• 关键词：Supersaturated solutions ; Calcium carbonate ; Intermolecular interaction forces ; Mass transport
• 刊名：Journal of Mathematical Chemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：54
• 期：1
• 页码：44-60
• 全文大小：491 KB
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• 作者单位：Martina Costa Reis (1)
  Maria de Fátima Brito Sousa (1)
  Celso Aparecido Bertran (1)
  Adalberto Bono Maurizio Sacchi Bassi (1)
  
  1. Department of Physical Chemistry, Institute of Chemistry, University of Campinas- UNICAMP, Campinas, São Paulo, Brazil
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Theoretical and Computational Chemistry
  Mathematical Applications in Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1572-8897

文摘

Based on principles of non-equilibrium thermodynamics, the behavior of calcium carbonate supersaturated solutions of high salinity is studied. For this purpose, these solutions are treated as continuous media whose physicochemical properties change in space and time. Furthermore, by exploiting the Müller–Liu formulation for the second law of thermodynamics, one recognizes which thermodynamic forces are responsible for keeping the \(CaCO_{3}\) supersaturated solutions out of equilibrium. The obtained results suggest that intermolecular interaction forces play an important role in the dynamics of solution, as well as in the mass transport of solutes. Particularly, from the estimated values for the self-diffusion and mutual diffusion coefficients of NaCl(aq), \(CaCl_{2}(aq)\), and \(Na_{2}CO_{3}(aq)\), one discusses whether changes in the concentration of NaCl(aq) may affect the mass transport of \(Na_{2}CO_{3}(aq)\) and \(CaCl_{2}(aq)\) in calcium carbonate supersaturated solutions. The results of this work may be helpful to understand better the influence of diffusive processes and intermolecular interaction forces on the dynamics of calcium carbonate supersaturated solutions of high salinity. Keywords Supersaturated solutions Calcium carbonate Intermolecular interaction forces Mass transport