<br>煤气化细渣微波合成氨基功能化MCM-41用于阴离子和阳离子染料的高效双向吸附,Chemosphere

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煤气化细渣微波合成氨基功能化MCM-41用于阴离子和阳离子染料的高效双向吸附
Chemosphere ( IF 8.1 ) Pub Date : 2024-01-23 , DOI: 10.1016/j.chemosphere.2024.141229
Zhen Chai ₁ , Bin Liu ₁ , Peng Lv ₁ , Yonghui Bai ₁ , Jiaofei Wang ₁ , Weiguang Su ₁ , Xudong Song ₁ , Guangsuo Yu ₂ , Guangyu Xu ₃

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煤基固体废物已被认为是制备用于废水处理的高附加值材料的可持续原材料。本文设计了一条以煤气化细渣为原料快速、高效、低成本制备MCM-41沸石的制备路线。通过在其表面接枝氨基对MCM-41进行功能化改性，以提高其应用性能。此外，所制备的功能化材料用于阴离子和阳离子染料的双向吸附。实验结果表明，利用微波合成法升温快、渗透性强的优点，快速制备出具有高度有序孔结构的MCM-41沸石，比表面积高达862.03 m/g。胺功能化的MCM-41对阳离子和阴离子染料均表现出很强的吸附能力，对亚甲基蓝和刚果红的最大吸附容量分别为292.40 mg/g和354.61 mg/g。吸附动力学和吸附机理的研究表明，吸附过程主要通过化学吸附来控制，包括静电引力、氢键和π-π相互作用。本研究结果将为利用煤基固体废弃物制备功能材料处理有机废水提供有益的参考。

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Microwave synthesis of amino-functionalized MCM-41 from coal gasification fine slag for efficient bidirectional adsorption of anionic and cationic dyes

Coal based solid waste has been recognized as a sustainable raw material for the preparation of high added value materials for wastewater treatment. In this paper, a preparation route was designed for the rapid, efficient, and low-cost preparation of MCM-41 zeolite using coal gasification fine slag as raw material. Functionalization modification of MCM-41 was carried out by grafting amino groups on its surface to improve its application performance. Moreover, the prepared functionalized material is used for bidirectional adsorption of anionic and cationic dyes. The experimental results indicate that MCM-41 zeolite with highly ordered pore structure was rapidly prepared using the advantages of fast heating and strong permeability of microwave synthesis method, with a specific surface area of up to 862.03 m/g. Amine functionalized MCM-41 exhibits strong adsorption capacity for both cationic and anionic dyes, with maximum adsorption capacities for methylene blue and Congo red being 292.40 mg/g and 354.61 mg/g, respectively. The study of adsorption kinetics and adsorption mechanism indicate that the adsorption process is mainly controlled through chemical adsorption, including electrostatic attraction, hydrogen bonding, and π-π interactions. The results of this study will provide useful references for the use of coal based solid waste to prepare functional materials for the treatment of organic wastewater.

更新日期：2024-01-23

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