| 马修臻,胡斌.化学通报,2020,83(5):459-463. |
| NaCl-KCl-H2O体系的体积性质及其与Pitzer模型的相关性研究 |
| Volumetric Properties of NaCl-KCl-H2O System and Their Correlation with Pitzer Model |
| 投稿时间：2019-11-05 修订日期：2019-12-25 |
| DOI： |
| 中文关键词: 密度 Pitzer离子相互作用模型 盐湖卤水 混合体积 |
| 英文关键词:Density Pitzer ion-interaction Model Salt lake brine Volume of mixing |
| 基金项目:青海省应用基础研究项目（2017-ZJ-704）资助 |
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| 中文摘要: |
| 本文用高精度数字式振荡管密度计测定了288～323K范围内NaCl-KCl混合溶液的密度，溶液的离子强度范围从0.1到4mol·kg-1。用密度实验值计算了三元体系的超额体积并拟合得到了实验温度和浓度范围内的Pitzer模型参数，模型计算值与实验值的偏差在±0.0004g·cm-3以内。用Pitzer模型计算了不同离子强度下三元体系在298.15K下的混合体积。 |
| 英文摘要: |
| The densities of NaCl-KCl aqueous mixture were determined at temperatures from 288.15 to 323.15 K and over a range of composition at ionic strength of 0.1~4 mol·kg-1. A high precision vibrating-tube densitometer was used in the measurement. The excess volumes of the mixed electrolytes calculated from the experimental data permitted a parameterization of the Pitzer model for mixtures with the entire range of temperatures and compositions covered by this study. In addition, using the Pitzer model, we determined the volume of mixing at constant ionic strength and at 298.15 K. |
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