Li₂SO₄-Na₂SO₄-H₂O和Li₂SO4

本站小编 Free考研考试/2021-12-27

---

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, Pitzerion-interactionModel, Saltlake brine, Lithiumsulfate, Volumeof 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）

作者	单位	E-mail
马修臻	中科院青海盐湖研究所	59005551@qq.com
胡斌	中科院青海盐湖研究所	hubin@isl.ac.cn

摘要点击次数:1281 全文下载次数:0 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θ_V和 ψ_V,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 θ_V and ψ_V 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. 查看全文查看/发表评论下载PDF阅读器 相关附件：版权转让声明书 -->