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通过磁性银金属有机骨架纳米复合材料从水溶液中吸附和去除工业染料。

Superior adsorption and removal of industrial dye from aqueous solution via magnetic silver metal-organic framework nanocomposite.

机构信息

Department of Chemistry, Faculty of Science, Northern Border University, Arar, Saudi Arabia.

Department of Chemistry, College of Science, University of Tabuk, Tabuk, Saudi Arabia.

出版信息

Environ Technol. 2024 May;45(13):2558-2574. doi: 10.1080/09593330.2023.2178331. Epub 2023 Feb 20.

Abstract

The indirect emission had a negative influence on the ecosystem of enormous amounts of harmful dyes into water. FeO@Ag-MOF was successfully fabricated to capture Gentine violet (GV)) as a model example of cationic dye from their aqueous solutions was evaluated in this search as a method to eliminate dyes from water contaminants. FTIR, XPS, BET, TGA, SEM, TEM, and XRD have all been used to study this adsorbent in order to determine its structural and chemical characteristics as well as to interpret its binding mechanisms. According to the results of the characterization, the synthesized composite had a size about 45 nm, a surface area of 856.06 m/g, and considerable magnetic characteristics (66.2 emug). Consequently, we created mesoporous surfaces that had a strong ability to interface and absorb GV dye. It is possible to use the pseudo-second order rate equation to characterize the kinetic profile., while the Langmuir equation fits isotherm models. At pH 9, maximum sorption capacities can reach 1.68 mmol.g. Additionally, the investigations of temperature profiles indicated the endothermic process and Thermodynamic parameters were discovered as, ΔG°, ΔH° and ΔS° The synthesized adsorbent had an interestingly high reusability of > 92 percent up to the sixth cycle. These findings revealed that a mixture of electrostatic interactions, π-π stacking, hydrogen bonds, and pore filling were involved in the GV adsorption mechanism. FeO@Ag-MOF was successful in demonstrating its effectiveness as a point-of-use colour collection candidate from actual dyeing effluents.

摘要

间接排放将大量有害染料排放到水中,对生态系统造成了负面影响。本研究成功制备了 FeO@Ag-MOF,以其从水溶液中捕获阳离子染料作为模型,如结晶紫(GV),以此作为从水中去除染料的方法。通过傅里叶变换红外光谱(FTIR)、X 射线光电子能谱(XPS)、比表面积及孔径分布(BET)、热重分析(TGA)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和 X 射线衍射(XRD)等手段对吸附剂进行了研究,以确定其结构和化学特性,并解释其结合机制。根据表征结果,合成的复合材料粒径约为 45nm,比表面积为 856.06m/g,具有较强的磁性(66.2 emu/g)。因此,我们创造了具有较强界面和吸附 GV 染料能力的介孔表面。可以用伪二级速率方程来描述动力学曲线,而 Langmuir 方程则适合等温模型。在 pH 值为 9 时,最大吸附容量可达 1.68mmol/g。此外,温度曲线的研究表明,该吸附过程是吸热的,同时还发现了热力学参数,如:ΔG°、ΔH°和ΔS°。合成的吸附剂在第六次循环时仍具有高达 92%的高重复利用率。这些发现表明,静电相互作用、π-π 堆积、氢键和孔填充共同参与了 GV 的吸附机制。FeO@Ag-MOF 成功地证明了其作为实际染色废水中有用的颜色收集剂的潜力。

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