煤矸石制备丝光沸石分子筛及吸附性能研究

Study on Preparation of Mordenite Molecular Sieve from Coal Gangue and Its Adsorption Properties

摘要: 以处理过的煤矸石为硅源、铝源，按照SiO₂:Al₂O₃:Na₂O:H₂O = 30:2:9:180的摩尔配比，采用静态水热晶化法放入反应釜中在180℃下晶化80 h后，将获得的样品离心并洗涤至中性，过滤干燥，对产物的物理化学特性进行了表征XRD的结果表明合成出了丝光沸石分子筛，扫描电镜图谱也出现了相似的丝光沸石板状结晶，并且有较高的结晶度。吸附结果表明，亚甲基蓝浓度为3 mg/L、丝光沸石投加量为1 g/L、反应时间为120 min、pH为10，对亚甲基蓝的脱色率为86.7%，吸附量为4.9 mg/g。

Abstract: Using processed coal gangue as the silicon and aluminum sources, the static hydrothermal crystallization method was employed in a reactor at 180˚C for 80 hours with a molar ratio of SiO₂:Al₂O₃:Na₂O:H₂O = 30:2:9:180. The samples obtained were centrifuged, washed to neutrality, filtered, and dried. The physical and chemical characteristics of the product were characterized. XRD results confirmed the synthesis of mordenite molecular sieve, and scanning electron microscopy images revealed similar plate-like faujasite crystals with high crystallinity. Adsorption results showed that at a methylene blue concentration of 3 mg/L, mordenite dosage of 1 g/L, reaction time of 120 min, and pH of 10, the decolorization rate of methylene blue reached 86.7%, with an adsorption capacity of 4.9 mg/g.