化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (6) : 214-218. DOI: 10.19817/j.cnki.issn1006-3536.2025.06.002

科学研究

煤矸石基沸石分子筛的制备及其对废水中Cu²⁺吸附性能研究

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Preparation of coal gangue-based zeolite molecular sieve and its adsorption properties for Cu²⁺ in wastewater

Zhang Bochao¹, Du Fei¹, Tong Hui¹, Long Xueying²

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Received		Published
2024-05-16		2025-06-20
Issue Date	Revised Date
2025-06-17	2024-05-16

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摘要

煤矸石中富含SiO₂和Al₂O₃,可作为制备沸石分子筛的廉价原料。以陕西府谷地区某典型煤矸石为研究对象,破碎筛分经过高温煅烧除杂后,采用碱熔-水热法在80℃、90℃、100℃条件下制备煤矸石基沸石分子筛。通过X射线衍射仪、扫描电子显微镜、全自动比表面积和孔隙分析仪、傅里叶变换红外光谱仪对产物晶体结构、组成、微观形貌和比表面积进行了表征。将水热温度90℃制备的沸石分子筛用于吸附废水中Cu²⁺,并考察沸石分子筛投加量、溶液pH、吸附温度和吸附时间对Cu²⁺吸附效果的影响。结果表明:水热温度90℃时产物形态较佳且结晶度较高,比表面积为66.27m²/g;沸石分子筛投加量为0.35g,溶液pH=6,吸附温度为45℃,吸附时间为55min时,对Cu²⁺吸附效果最佳。

Abstract

Coal gangue is rich in SiO₂ and Al₂O₃,which can be used as a cheap raw material for preparing zeolite molecular sieves.Taking a typical coal gangue from the Fugu area in Shaanxi Province as the research object,after crushing and screening and high-temperature calcination to remove impurities,coal gangue-based zeolite molecular sieves were prepared by alkali melting-hydrothermal method at 80℃,90℃,and 100℃ conditions.The crystal structure,composition,microscopic morphology,and specific surface area of the products were characterized by X-ray diffraction instrument,scanning electron microscope,fully automatic specific surface area and pore analyzer,and Fourier transform infrared spectrometer.The zeolite molecular sieve prepared at 90℃ hydrothermal temperature was used to adsorb Cu²⁺ in wastewater,and the effects of zeolite molecular sieve dosage,solution pH,adsorption temperature,and adsorption time on the adsorption efficiency for Cu²⁺ were investigated.The results showed that the product had better morphology and higher crystallinity at 90℃ hydrothermal temperature,with a specific surface area of 66.27m²/g.When the zeolite molecular sieve dosage was 0.35g,the solution pH=6,the adsorption temperature was 45℃,and the adsorption time was 55min,the adsorption efficiency for Cu²⁺ was optimal.

关键词

煤矸石 / 沸石 / 分子筛 / Cu²⁺ / 吸附效果

Key words

coal gangue / zeolite / molecular sieve / Cu²⁺ / adsorption effect

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煤矸石基沸石分子筛的制备及其对废水中Cu²⁺吸附性能研究[J]. 化工新型材料, 2025, 53(6): 214-218 DOI:10.19817/j.cnki.issn1006-3536.2025.06.002

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基金资助

国家自然科学基金(U1810113)

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