金属有机骨架与聚氧化物水凝胶复合材料的吸附研究

E. B. AttahDaniel, E. Dikio, N. Ayawei, D. Wankasi, F. Mtunzi, P. N. Diagboya
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引用次数: 0

摘要

虽然吸附技术是生态环境友好的,但大多数技术缺乏完全消除污染物的有效性,导致人们越来越担心水中污染物对人体的影响。因此,低吸附容量吸附剂的协同组合可能是提高其含水污染物吸收率的有效方法。将溶胶-凝胶合成的镧-1,4-苯二甲酸盐金属有机骨架(LaBDC - MOF)与聚氧聚乙烯(PEO)水凝胶相结合,制备了一种吸附亚甲基蓝(MB)的协同复合吸附剂(PEO-LaBDC)。原始LaBDC MOF和PEO水凝胶的主要性能在表征的复合材料中得到表达,表明制备成功。PEO-LaBDC复合材料对MB的去除率(60 min)至少是原始LaBDC MOF (120 min)和PEO水凝胶(125 min)的两倍。动力学模型呈分形拟合,各吸附剂在pH = 12、10和10的碱性端均有最佳吸附。与原始的LaBDC MOF相比,复合材料的吸附性能提高了约177%;支持复合材料中吸附剂的协同组合可以增强吸附过程的观点。因此,PEO-LaBDC复合材料是一种很有前途的水溶性MB修复吸附剂。
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Adsorption investigation of a composite of metal-organic framework and polyethylene oxide hydrogel
Though adsorption techniques are eco-environmentally friendly, most lack the effectiveness of complete contaminant elimination leading to increasing concerns about the presence of aqueous contaminants on humans. Thus, synergistic combination of low adsorption capacity adsorbents may be an effective method to enhance their aqueous contaminant uptake. Sol-gel synthesized lanthanum-1,4-benzene dicarboxylate metal organic framework (LaBDC MOF) and polyethylene oxide (PEO) hydrogel were combined to prepare a synergistic composite adsorbent (PEO-LaBDC) for aqueous methylene blue (MB) adsorption. Major properties of the pristine LaBDC MOF and PEO hydrogel were expressed in the characterized composite indicating successful preparation. PEO-LaBDC composite MB removal rate of MB was at least twice as fast (60 min) to those of the pristine LaBDC MOF (120 min) and PEO hydrogel (125 min). The fitting of kinetics model was fractal in nature, and optimum adsorption was on the alkaline end of the pH spectrum for all adsorbents (pH = 12, 10, and 10, respectively). Comparatively, the composite exhibited a better adsorption performance of ≈177% higher than the pristine LaBDC MOF; buttressing the idea that synergistic combination of adsorbents in composites could enhance adsorption processes. Therefore, the PEO-LaBDC composite is a promising adsorbent for the remediation of aqueous MB.
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来源期刊
CiteScore
6.00
自引率
1.70%
发文量
24
期刊介绍: Proceedings of the Institution of Mechanical Engineers Part N-Journal of Nanomaterials Nanoengineering and Nanosystems is a peer-reviewed scientific journal published since 2004 by SAGE Publications on behalf of the Institution of Mechanical Engineers. The journal focuses on research in the field of nanoengineering, nanoscience and nanotechnology and aims to publish high quality academic papers in this field. In addition, the journal is indexed in several reputable academic databases and abstracting services, including Scopus, Compendex, and CSA's Advanced Polymers Abstracts, Composites Industry Abstracts, and Earthquake Engineering Abstracts.
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