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采用垂直土柱易混置换法,就不同质地及不同的加溶质方式对氟在土中运移规律的影响进行了研究,结果表明:氟在黏粒含量高的土中的水动力弥散系数和阻滞因子均大于黏粒含量低的土,在溶质注入方式上,同时加NaF和NaCl混合液比单独加NaF溶液在浓度峰值到达时间上要来得慢些,浓度峰值也小,但在解吸过程中合加NaF溶液时淋出氟的浓度比单加溶液时要大。
The effects of different soil and different solutes on the migration of fluorine in the soil were studied by the vertical soil column miscible displacement method. The results show that the hydrodynamic dispersion coefficient of fluorine in the clay with high clay content and The retardation factors are all larger than that of clay with low clay content. In the way of solute injection, the mixture of NaF and NaCl is slower than the solution of NaF alone in the arrival time of peak concentration, and the peak of concentration is also smaller. However, in the desorption process The concentration of leaching fluorine in the combined plus NaF solution is greater than when adding the solution alone.