吸附水中腐殖酸的钴基金属有机骨架的合成及应用

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-04-11 DOI:10.15255/cabeq.2021.1960

Sana Naseem, H. Aslam, Aamir Abbas, Sara Sumbal, Rizwan Ali, Muhammad Usman

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引用次数: 2

摘要

研究了腐殖酸在钴基金属有机骨架（Co-MOF）上的吸附行为。采用溶剂热法合成了Co-MOF，并利用X射线衍射（XRD）、傅立叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）对其进行了表征。材料的表征结果证实了MOF结构的形成。通过批量实验获得实验吸附数据，还研究了吸附动力学、等温线、热力学以及等温吸附热。在pH 6和305 K下获得了~91 mg g–1的最佳吸附量。实验结果的回归分析表明，吸附动力学遵循准二阶动力学模型，吸附可以在~20分钟达到平衡。吸附等温线数据可以很好地与Koble-Corrigan等温线拟合。热力学参数表明，腐殖酸的吸附是一个自发的、吸热的物理过程，而等温评价揭示了吸附剂的非均相性质。总的来说，Co-MOF是一种很有前途的吸附水中腐殖酸的选择。

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Synthesis and Application of Cobalt-based Metal-organic Framework for Adsorption of Humic Acid from Water

In this study, the adsorption of humic acid on cobalt based metal-organic framework (Co-MOF) was investigated. Co-MOF was synthesized via solvothermal technique and further characterized using X-ray diffraction (XRD), Fourier transform infrared spectros-copy (FTIR), and scanning electron microscopy (SEM). The characterization results of material confirm the formation of MOF structure. The adsorption kinetics, isotherms, thermodynamics, as well as isosteric heat of adsorption were also investigated by obtaining experimental adsorption data through batch experimentation. Optimum adsorption uptake of ~91 mg g –1 was attained at pH 6 and 305 K. Regression analysis of experimental results revealed that adsorption kinetics follows a pseudo-second-order kinetic model, and adsorption can reach equilibrium at ~20 min. Adsorption isotherm data can be well fitted with Koble Corrigan isotherm. Thermodynamic parameters demonstrated that the adsorption of humic acid is a spontaneous, endothermic, and physical process, while isosteric heat evaluations revealed the heterogeneous nature of the adsorbent. Overall, the Co-MOF was a promising choice to adsorb humic acid from water.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.