【摘要】 以云南曲靖地区煤矸石为研究对象，经硫酸除铁后采用碱熔法制备NaX分子筛，利用XRD、SEM等手段对其进行表征，并研究分子筛用量、吸附时间和吸附温度对NaX分子筛吸附废水中Cu²⁺的影响，结果表明，以煤矸石酸浸渣为主要原料，不外加铝硅源合成NaX分子筛的最佳条件为：将酸浸渣和氢氧化钠混合（质量比1∶1.2）置于800℃下碱熔活化1.0 h,再在92℃水浴中晶化10 h,制得的NaX分子筛结构为四面体晶体形状；室温下在分子筛用量为2 g/L、吸附时间为24 min的条件下，分子筛对Cu²⁺的吸附效果最好，去除率在98%以上；采用Langmuir等温吸附模型对分子筛吸附数据进行拟合，发现吸附过程是单层吸附。研究成果为煤矸石综合利用提供了一条有效途径。更多还原

【Abstract】 Taking coal gangue from Qujing area, Yunnan province as the research object, NaX type molecular sieves were prepared by alkali melting method after removing iron with sulfuric acid. XRD, SEM and other methods were used to characterize them. The effects of molecular sieve dosage, adsorption time, and adsorption temperature on the adsorption of heavy metal Cu²⁺ by NaX molecular sieves in wastewater were studied. The results showed that the optimal conditions for synthesizing NaX molecular sieves using coal gangue acid leaching slag as the main material without adding aluminum and silicon sources were as follows: mixing acid leaching slag and sodium hydroxide（mass ratio 1∶1.2） for alkaline dissolution activation at 800 ℃ for 1.0 h, crystallization in a 92 ℃ water bath for 10 h, and the NaX molecular sieve structure was tetrahedral crystal shape; At room temperature, under the conditions of a molecular sieve dosage of 2 g/L and an adsorption time of 24 min, the molecular sieve has the best adsorption effect on Cu²⁺, with a removal rate of over 98%; The Langmuir isotherm adsorption model was used to fit the adsorption data of molecular sieves, and it was found that the adsorption process was monolayer adsorption. The research results provide an effective way for the comprehensive utilization of coal gangue.更多还原