| 非饱和带土体-浅层地下水系统氟的地球化学——以河北邢台山前平原为例 |
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| 引用本文：曾溅辉,张宗祜,任福弘.1997.非饱和带土体-浅层地下水系统氟的地球化学——以河北邢台山前平原为例[J].地球学报,18(4):389-396. |
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| 基金项目:“八·五”国家科技攻关项目,国家自然科学基金 |
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| 中文摘要: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 |
| 中文关键词:非饱和带土体 浅层地下水 氟的地球化学 |
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| Fluorine Geochemistry in the Unsaturated Soils-Shallow Groundwater Systems——A Case Study on the Xingtai Piedmont Plain, Hebei |
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| Abstract:The unsaturated soils and the shallow groundwater constitute a complete hydrogeochemical interaction system in the area of shallow high_fluoride groundwater in the Xingtai piedmont plain.In the system,the two key factors influencing fluorine transport and accumulation between the unsaturated soils and the shallow groundwater are the fluorine source intensity of the unsaturated soils and the accumulated and preserved conditions of fluorine in the shallow groundwater.The fluorine source intensity is determined by the mineralogy、 chemical composition and grain sizes of the unsaturated soils,while the accumulated and preserved conditions of fluorine depend on the chemical composition of the shallow groundwater.The research results of the dynamic experiment of the fluoride transport and accumulation in the unsaturated soils_shallow groundwater system under the condition of precipitation infiltration indicate that the unsaturated soils are the important fluride source of shallow groundwater, and that the fluorine geochemical reactions in the water_soils system of the unsaturated soils mainly involve with aqueous complexation,dissolution/precipitation and adsorption/desorption.Besed on the experiment,these geochemical reaction models can be established through the chemical thermodynamics and Kinetics. |
| keywords:unsaturated soils shallow groundwater fluorine geochemistry |
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