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Study of the Relationship Between New Ionic interaction Parameters and Salt Solubility in Electrolyte Solutions Based on Molecular Dynamics Simulation

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Journal of Ocean University of China 2024年第2期23卷 467-476页

作者： SUN Wenting HU Yangdong ZHENG Jiahuan SUN Qichao Chen Xia DING Jiakun ZHANG Weitao WU Lianying College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Institute of Chemical Engineering Guangdong Academy of Science Guangzhou 510665China

Studying the relationship between ionic interactions and salt solubility in seawater has implications for seawater desalination and mineral *** this paper,a new method of expressing ion-to-ion interaction is proposed by using molecular dynamics simulation,and the relationship between ion-to-ion interaction and salt solubility in a simulated seawater water-salt system is *** analyzing the variation of distance and contact time between ions in an electrolyte solution,from both spatial and temporal perspectives,new parameters were proposed to describe the interaction between ions:interaction distance(ID),and interaction time ratio(ITR).The best correlation between characteristic time ratio and solubility was found for a molar ratio of salt-to-water of 10:100 with a correlation coefficient of *** the same salt,a positive correlation was found between CTR and the molar ratio of salt and *** type 1-1,type 2-1,type 1-2,and type 2-2 salts,the correlation coefficients between CTR and solubility were 0.93,0.96,0.92,and 0.98 for a salt-to-water molar ratio of 10:100,*** solubility of multiple salts was predicted by simulations and compared with experimental values,yielding an average relative deviation of 12.4%.The new ion-interaction parameters offer significant advantages in describing strongly correlated and strongly hydrated electrolyte solutions.

关键词： molecular dynamics simulation interaction distance interaction time rate electrolyte aqueous solutions solubility

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