| 马修臻,胡斌.化学通报,2018,81(10):939-943,938. |
| Li2SO4-Na2SO4-H2O和Li2SO4- K2SO4-H2O溶液的体积性质（英文） |
| Volumetric properties of Aqueous Li2SO4- Na2SO4-H2O and Li2SO4- K2SO4-H2Osolutions |
| 投稿时间：2018-05-25 修订日期：2018-07-25 |
| DOI： |
| 中文关键词: 密度 Pitzer离子相互作用模型 盐湖卤水 硫酸锂 混合体积 |
| 英文关键词:Density, Pitzer ion-interaction Model, Salt lake brine, Lithium sulfate, Volume of mixing |
| 基金项目:国家自然科学基金面上项目（41472078），青海省应用基础研究项目（2017-ZJ-704） |
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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288K至318K温度范围内Li2SO4 + Na2SO4 + H2O和 Li2SO4 + K2SO4 + H2O三元体系的密度。混合溶液的离子强度范围从0.1到4.5 mol.kg–1,混合溶液中Na2SO4和K2SO4的离子强度分数为0.2,0.4,0.6和0.8。用密度实验值拟合得到了不同温度下Pitzer离子相互作用模型混合参数θV和 ψV,模型的计算值与实验值的偏差在±0.002 g.cm–3以内。用Pitzer模型计算了不同离子强度下三元体系的混合体积。 |
| 英文摘要: |
| Densities of two aqueous ternary systems Li2SO4 + Na2SO4+ H2O, Li2SO4 + K2SO4 + H2O were measured with high precision vibrating–tube densitometer over the temperature range 288 ≤ T/K ≤ 318. The experimental study of these systems were carried out for four total ionic strengths ranging from 0.1 to 4.5 mol.kg–1. For each total ionic strength, the values of the ionic strength fraction of the Na2SO4 and K2SO4 were y2 ≈ 0.2, 0.4, 0.6, and 0.8. The Pitzer mixing parameters θV and ψV for the ternary systems were fit to the experimental density values. Also, using the Pitzer model, we determined the volume of mixing at constant ionic strength and at 298.15K, for each of the ternary systems that have been studied. |
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