摘要
试验针对存在饮用水的氟污染问题,将天然沸石用NaOH和Al2(SO4)3溶液改性制成除氟材料。静态试验研究表明:改性沸石除氟吸附反应快,其最佳pH值范围为5￣9,而且对氟离子具有较好的离子选择性能。通过动态试验研究发现降低进水流量和原水浓度可以增大滤层的吸附容量。两种再生方式对比试验表明用Al2(SO4)3溶液再生效果优于用NaOH和Al2(SO4)3溶液联合再生。
Aimed at the problem that fluoride pollutes drinking water nowadays, NaOH and Al2（SO4）3 solution is used to modify natural zeolite into a kind of material which can be used to remove fluoride. Static experiments show that absorption reaction carries out quickly when modified zeolite is used as fluoride removal and can acquire optimal effect as to water with PH value 5 - 9,also modified zeolit have good selectivity as to F^-. Dynamic experiments show that decreasing flux and the consistence of raw water can gain great absorPtion capability. Contrast experiments on two ways of regenerating fluoride removal material show that regeneration efficacy when Al2（SO4）3 is Used is higher than that when NaOH is used together with Al2（SO4）3 .
基金
国家高技术研究发展专项经费资助项目(2002AA60).
关键词
改性沸石
饮用水
除氟
再生
Modified zeolite
Drinking water
Fluoride removal
Regeneration
