局部组成模型在含硝酸盐水盐体系中的应用——单盐能量参数的估算

本文引用最新及浓度范围宽的活度系数和渗透系数数据，应用MatLab中的优化工具，重新拟合电解质溶液局部组成模型应用于Na^＋，K^＋，Mg^2＋／Cl^-，SO4^-，NO3^-H2O体系时所涉及到的单独电解质的能量参数．以渗透系数数据为基础获得能量参数时拟合偏差校而以平均活度系数、渗透系数＋平均活度系数数据拟合处理的偏差大且接近．钾盐、钠盐能量参数的拟合结果均很好或较好，而镁盐的计算结果较差．拟合偏差和离子种类有很大关系，阴离子的影响要小于阳离子．

Study on the Local Composition Model in the Aqueous Electrolyte Solution with Salt Nitrate

With using new data of osmotic coefficients and activity coefficients within more wider range of concentration, the energy parameters of single salts involved in the system Na^＋, K^＋, Mg^2＋/Cl^-, SO4^2-, NO3^-H2O have been evaluated again by utilizing the optimizing method of MatLab. The mean square deviations for valuating parameters using the data of osmotic coefficients are smaller than using the data of activity coefficients or activity coefficients ＋ osmotic coefficients. The mean square deviations for valuating parameters of potassium salt, sodium salt are small, but great for Magnesium salt. The mean square deviations for valuating parameters relevant to the sorts of ions, the effect of anions on the mean square deviations for valuating parameters are greater than cations.