首页|Renewable conversion of coal gangue to 13-X molecular sieve for Cd2+-containing wastewater adsorption performance

Renewable conversion of coal gangue to 13-X molecular sieve for Cd2+-containing wastewater adsorption performance

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Using coal gangue(CG)as raw material,a new type of all solid-waste-based 13-X molecular sieve material was controllably prepared by alkali fusion-hydrothermal method.The synthetic molecular sieve was used as a solid adsorbent to treat Cd2+-containing wastewater,and its adsorption behavior on Cd2+in aqueous solution was studied and analyzed.The microstructure and morphology of the molecular sieve were investigated by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM)and specific surface area analyzer.The results show that the synthesized 13-X molecular sieve has higher Brunauer-Emmett-Teller(BET)specific sur-face area with higher crystallinity and higher adsorption capacity for the heavy metal Cd2+.The adsorption process of Cd2+by molecular sieve conforms to the Langmuir isotherm adsorption equation and Lagergren pseudo-sec-ond-order rate equation.Combined with thermodynamic calculation,it can be concluded that the adsorption process is physically monolayer,spontaneous and exothermic.In this study,a low-cost and naturally available synthesis method of 13-X molecular sieve is reported.Combined with its adsorption mechanism for Cd2+,it provides a feasible and general method for removing heavy metal ions from coal gangue and also provides a new way for the utilization of coal gangue with high added value.

Coal gangueHydrothermal synthesis13-X molecular sieveAdsorptionWastewater containing Cd2+

Le Kang、Si-Fan Liu、Da-Wei Yi、Kai Wang、Hui-Ling Du、Hao-Qi Huang、Peng Chen

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College of Materials Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China

School of Electrical Engineering,Weihai Innovation Research Institute,Qingdao University,Qingdao 266000,China

School of Metallurgy,Northeastern University,Shenyang 110819,China

School of Materials and Chemical Engineering,Tongren University,Tongren 554300,China

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国家自然科学基金Basic Research Plan of Natural Science of Shaanxi ProvinceKey Innovation Team of Shaanxi ProvinceExcellent Youth Science and Technology Fund Project of Xi'an University of Science and TechnologySpecial Project of Shaanxi ProvinceStudy on Preparation and Properties of New Solid-Wastebased Cementitious Materials

521720992020JQ-7542014KCT-04631022100919JK04906000190120

2024

10.1007/s12598-023-02461-3

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(2)
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