不同预处理方式对改性沸石吸附氟离子的影响

摘要

In order to remove the fluoride of drinking water , the modified zeolite was investi-gated in this paper .The fluoride of simulative drinking water removal effect was studied with two different pretreatments .When NH4 Cl was used in the first pretreatment , the rate of flu-oride removal efficiency could reach 95%.The NaOH was used in the second pretreatment , and the rate of fluoride removal efficiency could reach 85%.Dynamic fluoride removal ex-periment was investigated under the NH 4 Cl pretreatment .The results showed that fluoride of simulative drinking water removal efficiency was better and it could reach 95%when NH4 Cl used as modified pretreatment with weakly acidic conditions .%为除去饮用水中的氟离子，实验采用改性的天然沸石去除模拟饮用水中的氟离子，并研究两种不同预处理方式对改性沸石去除氟离子的影响。采用氯化铵进行预处理，除氟率可达95％；采用氢氧化钠进行预处理，除氟率可达85％。通过进一步氯化铵条件下的动态除氟实验，改性沸石除氟用氯化铵预处理效果较好，适宜在弱酸性条件下进行。