本文采用分子动力学方法模拟了温度363.15 K和413.15 K,压力3 MPa和6 MPa条件下,硫化氢在不同浓度无机盐溶液中的溶解度并对Hofmeister效应中反常现象进行了讨论.研究表明,相同温度和离子浓度下,压力越高硫化氢的溶解度越大;相同压力和离子浓度下,温度越高硫化氢的溶解度越小;相同温度和压力下,离子浓度越高,硫化氢的溶解度越小,与相关实验结果一致.溶解度模拟数据和geochem平台提供的数据相比,最小误差为5.5%,最大误差为17.7%,平均误差为13.1%.同时,还发现Hofmeister效应中的反常现象是由阳离子的尺寸效应引起的.
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