采用经碱熔融-离心提取处理的粉煤灰为原料,经水热反应法两步合成高纯度NaX型沸石。研究了溶液pH值、NaX型沸石的用量及初始摩尔浓度对模拟废水中Pb~(2+)去除效果的影响。结果表明,在25℃,pH值为5.5,NaX型沸石的投加量为1kg/m~3,吸附时间为30min时,对初始摩尔浓度为0.1~1mol/m~3的Pb~(2+)去除率均达到了99%以上。粉煤灰基NaX型沸石对Pb~(2+)的吸附符合Langmuir吸附等温方程和准二级反应动力学过程。 The fly ash treated by alkali melting and centrifugal extraction was used as raw material. The high purity NaX zeolite was synthesized by hydrothermal method. The effect of solution pH value, NaX zeolite dosage and initial molar concentration on the removal of Pb2 + in simulated wastewater was studied. The results showed that when the pH value was 5.5, the dosage of NaX zeolite was 1 kg / m ~ 3 and the adsorption time was 30 min, the reaction of Pb ~ (2+) with initial molar concentration of 0.1 ~ 1 mol / ) Removal rate reached more than 99%. The adsorption of Pb 2+ by fly ash-based NaX zeolite conforms to Langmuir adsorption isothermal equation and quasi-second-order reaction kinetics.