摘要
本文用高精度数字式振荡管密度计测定了288K至318K温度范围内三元体系Li_2SO_4-Na_2SO_4-H_2O和Li_2SO_4-K_2SO_4-H_2O的密度。溶液的离子强度范围从0. 1到4. 5mol·kg-1,在两种混合溶液中Na_2SO_4和K_2SO_4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。
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 for the experimental density values. Also,using the Pitzer model,we determined the volume of mixing at constant ionic strength at 298. 15 K,for each ternary system that have been studied.
作者
马修臻
胡斌
Ma Xiuzhen;Hu Bin(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Science;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province,Xining 8100)
出处
《化学通报》
CAS
CSCD
北大核心
2018年第10期939-943,938,共6页
Chemistry
基金
国家自然科学基金项目(41472078)
青海省应用基础研究项目(2017-ZJ-704)资助
