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Preparation of Magnetic Porous Aromatic Framework for Rapid and Efficient Removal of Organic Pollutants from Water
Analytical Sciences ( IF 1.8 ) Pub Date : 2020-10-10 , DOI: 10.2116/analsci.20p013
Wenjie Yu 1 , Hengye Li 2 , Lin Zhang 3 , Jing Liu 4 , Fenying Kong 2 , Wei Wang 2, 5
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In this study, efforts were made to prepare a porous aromatic framework (PAF) with build-in magnetic nanoparticles (Fe3O4-PAF) for use as an efficient adsorbent for the removal of organic pollutants from water. The Fe3O4-PAF showed good handleability and could be recovered easily by magnetic separation. As a proof of concept, the adsorption properties of Fe3O4-PAF were investigated to remove 2,4-dichlorophenol (2,4-DCP) and bisphenol A (BPA) from water. The Fe3O4-PAF showed a fast adsorption rate, high adsorption efficiency and high adsorption capacities. It adsorbed 2,4-DCP (0.1 mmol L−1) and BPA (0.1 mmol L−1) with pseudo-second-order rate constant (k2) of 2.1 and 3.54 g mg−1 min−1, respectively. According to the Langmuir isotherm model, the maximum adsorption capacities of 2,4-DCP and BPA onto Fe3O4-PAF were calculated to be 234.74 and 233.65 mg g−1, respectively. The Fe3O4-PAF also featured good tolerance to harsh conditions, facilitating its application in a real water environment. It could be regenerated easily and reused multiple times without obvious loss of efficiency. In summary, this study provides a general and effective way to improve the handleability of PAFs and expands the practical application of PAF-based materials.

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中文翻译:

磁性多孔芳香骨架的制备用于快速高效去除水中有机污染物

在这项研究中,我们努力制备一种内置磁性纳米粒子(Fe 3 O 4 -PAF)的多孔芳香骨架(PAF),用作去除水中有机污染物的有效吸附剂。Fe 3 O 4 -PAF表现出良好的可操作性并且可以通过磁分离容易地回收。作为概念验证,我们研究了Fe 3 O 4 -PAF 的吸附特性,以去除水中的 2,4-二氯苯酚 (2,4-DCP) 和双酚 A (BPA)。Fe 3 O 4 -PAF表现出吸附速率快、吸附效率高和吸附容量高的特点。它吸附2,4-DCP (0.1 mmol L -1 )和BPA (0.1 mmol L -1 ),准二级速率常数( k 2 )分别为2.1和3.54 g mg -1 min -1。根据Langmuir等温线模型计算出Fe 3 O 4 -PAF对2,4-DCP和BPA的最大吸附容量分别为234.74和233.65 mg g -1。Fe 3 O 4 -PAF还具有良好的耐恶劣条件的特性,有利于其在实际水环境中的应用。它可以很容易地再生并重复使用多次,而不会明显损失效率。总之,本研究为提高PAF的可操作性并扩大PAF基材料的实际应用提供了一种通用且有效的方法。

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更新日期:2020-10-28
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