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邢台山前平原浅层高氟地下水分布区,浅层地下水与非饱和带土体构成了一个完整的水文地球化学系统。在该系统中,非饱和带土体的氟源强度及浅层地下水体聚集和保存氟的条件是影响非饱和带土体浅层地下水之间氟迁移和富集的两个关键因素。其中前者直接受控于土体的矿物成分、化学成分和粒度组成,而后者主要取决于浅层地下水的化学成分特征。大气降水入渗条件下,非饱和带土体浅层地下水系统氟迁移和富集动态模拟实验结果表明,非饱和带土体是浅层地下水重要的供氟源,非饱和带水土系统氟的地球化学反应主要为水相络合反应、溶解/沉淀反应和吸附/解吸作用,利用化学热力学和化学动力学理论,在实验基础上,可以建立其地球化学反应模型。
Xingtai piedmont plain high fluoride groundwater distribution area, shallow groundwater and unsaturated soil form a complete hydrogeochemical system. In this system, the intensity of fluoride source in unsaturated zone and the accumulation of shallow groundwater bodies are the two key factors that affect the migration and enrichment of fluorine between shallow groundwater in unsaturated zone. The former is directly controlled by the mineral composition, chemical composition and grain size of the soil, while the latter mainly depends on the chemical composition of the shallow groundwater. Atmospheric rainfall infiltration conditions, the unsaturated soil with shallow groundwater system fluoride migration and enrichment dynamic simulation experiments show that unsaturated soil is an important source of shallow groundwater for fluoride, unsaturated soil and water system fluoride Earth Chemical reactions are mainly water phase complexation reaction, dissolution / precipitation reaction and adsorption / desorption. Based on chemical thermodynamics and chemical kinetic theory, the geochemical reaction model can be established on the basis of experiments.