石膏饱和指数——地球科学堆栈交换江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 07 - 10 - t12:46:31z //www.hoelymoley.com/feeds/question/12684 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/12684 2 石膏饱和指数 chrisuw92 //www.hoelymoley.com/users/11471 2017 - 11 - 15 - t10:43:02z 2017 - 11 - 16 - t08:08:22z < p >我做了一些地下水地球化学模拟,发现我有样品饱和对矿物石膏。我需要一些帮助解释,下面的更多信息。< / p > < p >地下水来自一个工程蓄水层,是由沙子。在施工之前,沙子在接触水含有高硫酸盐、钙浓度(溶解石膏)。也有一些黄铁矿氧化发生这无疑导致硫酸浓度增加。< / p > < p >我的地球化学建模工作提供证据,地下水溶解Ca和美元SO_4浓度与固相平衡美元石膏吗?意义矿物存在,即使最初是完全溶解吗?< / p > < p > < / p >感谢 //www.hoelymoley.com/questions/12684/-/12694 # 12694 1 答案由haresfur石膏饱和指数 haresfur //www.hoelymoley.com/users/1242 2017 - 11 - 16 - t08:08:22z 2017 - 11 - 16 - t08:08:22z < p >地球化学模型,比如phreeqc计算矿物的饱和指数(SI)基于解决方案的组成,温度和压力。这些都是用来计算离子的活动,根据活动系数。然后将出席的活动相比,饱和溶解度定义的产品(过度增殖)。The saturation index is < 0 if the solution is undersaturated with respect the mineral, = 0 at saturation, and > 0 if supersaturated.

So when you say the model shows you are saturated with respect to gypsum, it indicates that by definition you are in equilibrium with solid phase gypsum. It does not indicate if you got there by dissolving gypsum or by precipitating gypsum. It is highly unlikely (but theoretically possible) that your SI is exactly 0 without one of those things happening.
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