济南市平阴氡地热水中氟的来源及赋存机理浅析

Primary Analysis on the Resource and Occurrence Mechanism of Fluorine Ion in Radon Geothermal Water in Pingyin of Jinan City

摘要:

通过对3处不同热储类型的地热水水质分析结果的对比分析，试从热储岩性、矿化度、pH值、温度及地下水水化学类型等方面分析各因素对水中F溶解的影响机理，认为：热储岩性对地热水水质起决定作用，高热储温度、碱性环境是水中氟离子富集的有利条件；水中Ca2+可与F产生不溶于水的沉淀，对水中氟离子的富集起限制作用；水中F与H2SiO3，Sr的含量一般存在共生关系。水中氟的活性和含量不能看作只与某种盐类或阴、阳离子发生单相关的孤立作用的结果，而要重视在水中各种盐类并存的混合体系中可能出现的元素或物质间的拮抗、协同及交互作用。

Abstract:

Through contrast and analysis on three different types of geothermal water, from the aspects of geothermal reservoir lithology,TDS, pH, temperature and chemical types of groundwater, it is concluded that geothermal reservoir lithology plays a decisive role to geothermal water quality. High reservoir temperature and alkaline environment are favorable conditions for the enrichment of Fin water. Ca2+ and F can form precipitate which is insoluble in warer. It will limit the the enrichment of F . F, H2SiO3 and Sr usually appeared together in the same geothermal water. Activity and content of F in water should not only be seen as the result of some anion or cation associated with F as a single isolated action, the antagonistic, collaboration and interaction in the mixed system made by variety of salts coexist should be paid more attention.