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以活性炭(Activated carbon,AC)为原料,采用静态吸附试验的方法,研究AC对水中氟离子(F-)的去除效果以及吸附性能。结果表明,AC可以去除水中F-。3种AC对水中F-的吸附趋势大致相同,随着吸附时间的延长,水中F-浓度降低,去除率增加。吸附时间在0~1 h和10~24 h,吸附速度较快。当吸附时间分别为1,10,24和72 h,3种AC的F-去除率分别在6.23%~8.23%,8.57%~13.05%,26.01%~30.19%和38.89%~42.70%。3种AC对水中F-的吸附符合Freundlich吸附等温线方程,吸附能力介于易吸附和难吸附之间,其中AC2对F-的吸附容量最大,吸附能力最强。
Activated carbon (AC) was used as raw material to study the effect of AC on fluoride ion (F-) removal and adsorption performance in water by static adsorption test. The results show that AC can remove F- in water. The adsorption trends of F- in three kinds of ACs were almost the same. With the extension of adsorption time, the F- concentration in water decreased and the removal rate increased. Adsorption time in 0 ~ 1 h and 10 ~ 24 h, adsorption speed faster. The F-removal rates of the three ACs ranged from 6.23% to 8.23%, from 8.57% to 13.05%, from 26.01% to 30.19% and from 38.89% to 42.70% when the adsorption times were 1, 10, 24 and 72 h, respectively. The adsorption of F-in water by three kinds of ACs accorded with the Freundlich adsorption isotherm equation, and the adsorption capacity was between the easy adsorption and the difficult adsorption. AC2 had the largest adsorption capacity for F- and the strongest adsorption capacity.