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Stable cellulose-based porous binary metal–organic gels as highly efficient adsorbents and their application in an adsorption bed for chlortetracycline hydrochloride decontamination
Journal of Materials Chemistry A ( IF 11.9 ) Pub Date : 2020/03/10 , DOI: 10.1039/c9ta13818h
Meijun Liu 1, 2, 3, 4, 5 , Donglei Zou 1, 2, 3, 4, 5 , Taigang Ma 1, 2, 3, 4, 5 , Zhi Liu 5, 6, 7, 8 , Haiyang Yu 1, 2, 3, 4, 5 , Yangxue Li 1, 2, 3, 4, 5 , Zhen-An Qiao 3, 5, 9, 10
Affiliation  

To exploit adsorbents for removing refractory pollutants from aquatic environments, three novel bimetallic MOGs, JLUE-MOG-3, JLUE-MOG-4 and JLUE-MOG-5, with diverse large surface areas that could be controlled by varying the content of Fe or Al ions, were synthesized by a solvothermal method for chlortetracycline hydrochloride (CTC) capture. The obtained JLUE-MOG aerogels, with strong chemical and mechanical stability, showed strong CTC adsorption capacities as high as 1841.62, 1600.00 and 1396.65 mg g−1 at 25 °C, respectively, according to the Langmuir model. Beyond the porousness and electrostatic interactions, hydrogen-bonding interactions, water affinity and π–π interactions may also combine to contribute to the superb CTC removal. Furthermore, the interactions between influencing factors and the optimized experimental conditions were simulated by response surface methodology (RSM). Moreover, in order to enhance the practicability, cellulose aerogels were introduced as 3D porous support skeletons for the in situ growth of JLUE-MOG-4. As immobilized adsorbents, JLUE-MOG-4@cellulose composite aerogels exhibited a CTC removal efficiency of >95.00% during sustained 24 h operation in a custom-made adsorption bed. This work provides an in situ growth strategy for bringing MOGs into practical water remediation applications, with stable, efficient, processable and environmentally friendly features.

中文翻译:

稳定的纤维素基多孔二元金属有机凝胶作为高效吸附剂及其在盐酸金霉素消毒中的吸附床中的应用

为了利用吸附剂去除水生环境中的难降解污染物,三种新颖的双金属MOG,JLUE-MOG-3,JLUE-MOG-4和JLUE-MOG-5,具有不同的大表面积,可以通过改变Fe或Fe的含量来控制。通过溶剂热法合成了铝离子,用于捕获盐酸金霉素(CTC)。所获得的具有化学和机械稳定性的JLUE-MOG气凝胶显示出强大的CTC吸附能力,分别高达1841.62、1600.00和1396.65 mg g -1根据Langmuir模型,温度分别为25°C。除了多孔性和静电相互作用外,氢键相互作用,水亲合力和π-π相互作用也可能共同促进了出色的四氯化碳去除。此外,通过响应面法(RSM)模拟了影响因素与优化实验条件之间的相互作用。此外,为了增强实用性,引入了纤维素气凝胶作为3D多孔支撑骨架,用于JLUE-MOG-4的原位生长。作为固定的吸附剂,JLUE-MOG-4 @纤维素复合气凝胶在定制的吸附床上连续24小时运行期间,其四氯化碳的去除效率> 95.00%。这项工作提供了原位 具有稳定,高效,可加工和环保功能的MOG增长战略,用于将MOG应用于实际的水修复应用。
更新日期:2020-04-08
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