An accurate model for the solubilities of quartz in aqueous NaCl and/or CO2 solutions at temperatures up to 1273 K and pressures up to 20,000 bar
An accurate model for the solubilities of quartz in aqueous NaCl and/or CO2 solutions at temperatures up to 1273 K and pressures up to 20,000 bar
复制标题
温度高达 1273 K、压力高达 20,000 bar 时石英在 NaCl 和/或 CO2 水溶液中溶解度的精确模型
DOI：
10.1016/j.chemgeo.2019.03.009
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发表时间：
2019
期刊：
影响因子：
3.9
通讯作者：
Zheng Jingxu
中科院分区：
文献类型：
--
作者：
Shi Xunli;Mao Shide;Hu Jiawen;Zhang Jia;Zheng Jingxu
A simple and general relation between the solubility of quartz and the density of solution is derived rigorously. Based on this relation and the pressure-volume-temperature-composition model of Mao et al. (2010), an accurate density-based model is developed for the solubility of quartz in aqueous NaCl and/or CO2solution up to 1273 K and 20,000 bar. The model parameters are regressed with carefully assessed experimental data. Compared to a large number of experimental data, the average absolute deviations of calculated quartz solubilities in water, aqueous NaCl solution and aqueous CO2solution are 5.50%, 5.24% and 7.55%, respectively, which are within experimental uncertainties, and are much better than the most competitive models in literature. Particularly, this model can predict the experimental solubility of quartz in aqueous NaCl and CO2solution without using any additional parameter. This model can be incorporated in software for accurate geochemical modeling. The strategy of this model should be promising for the solubilities of other minerals in water or multicomponent aqueous solutions.
