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通过对研究区碳酸盐岩—土—水系统中氟的系统测定和吸附实验,结合矿物表面化学和土壤化学研究,揭示了岩溶地区岩—土—水系统中氟的地球化学特征和迁移富集机理。黔中岩溶地区深层地下水(100m以下)和土层具有高氟异常特征,而浅层地下水和地表水含氟较低(大多在0.5mg/l以下)。以含石膏碳酸盐岩为主的三叠纪海相地层是该区土水中氟的主要来源。土层中针铁矿表面对氟的专性吸附及其解吸作用是岩溶地区土水系统中氟迁移和富集的重要机理。
Through the systematic determination and adsorption experiments of fluorine in carbonate-soil-water system in the study area and the combination of mineral surface chemistry and soil chemistry, the geochemical characteristics of fluorine in the rock-soil-water system of karst area and the correlation between migration and enrichment of fluoride Set mechanism. Deep groundwater (below 100m) and soil layers in the karst area of central Guizhou have the characteristics of high fluorine anomalies, whereas those in shallow groundwater and surface water are lower (mostly below 0.5mg / l). Triassic marine facies dominated by gypsum carbonate rocks is the main source of fluorine in the soil and water of this area. Adsorption and desorption of fluoride on the surface of goethite in soil are important mechanisms of fluorine migration and enrichment in the soil-water system of karst area.