Adsorption of methyl violet from aqueous solution using β-cyclodextrin immobilised onto mesoporous silica

IF 2.1 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Supramolecular Chemistry Pub Date : 2021-04-03 DOI:10.1080/10610278.2021.1917574

Kai Liu, Huijun Liu, Liuxing Li, Wei Li, Juan Liu, Ting Tang

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引用次数: 2

Abstract

ABSTRACT β-cyclodextrin(β-CD) was immobilised onto mesoporous silica using 1,1′-carbonyldiimidazole and tetraethyl orthosilicate as raw materials to construct adsorbent in dye wastewater treatment. The mesoporous structure of β-CD@SiO2-1 was characterised by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), specific surface area measurement (BET), thermogravimetric (TG) and scanning electron microscopy (SEM). The adsorption experiments were studied by response surface method (RSM) to optimise various parameters such as initial concentration, contact time and adsorbent dosage on the adsorption property of β-CD@SiO2-1 to methyl violet. The optimum process conditions were initial concentration 34 mg/L, contact time 13 h and adsorbent dose 5 mg. The adsorption rates correspond to the pseudo-second-order kinetic model. The adsorption isotherm was suited to the Langmuir isotherm model. The thermodynamic parameters (ΔG°, ΔH°, ΔS°) were obtained. As a result, it was found that the adsorption process was exothermic and spontaneous. GRAPHICAL ABSTRACT

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介孔二氧化硅固载β-环糊精吸附水溶液中甲基紫的研究

以1,1′-羰基二咪唑和正硅酸四乙酯为原料，将β-环糊精(β-CD)固定在介孔二氧化硅上，构建染料废水处理吸附剂。采用傅里叶变换红外光谱(FT-IR)、x射线衍射(XRD)、比表面积(BET)、热重(TG)和扫描电镜(SEM)对β-CD@SiO2-1介孔结构进行了表征。采用响应面法(RSM)研究了初始浓度、接触时间、吸附剂用量等参数对β-CD@SiO2-1对甲基紫吸附性能的影响。最佳工艺条件为初始浓度34 mg/L，接触时间13 h，吸附剂用量5 mg。吸附速率符合准二级动力学模型。吸附等温线符合Langmuir等温线模型。得到了热力学参数ΔG°，ΔH°，ΔS°。结果表明，吸附过程是自发的、放热的。图形抽象

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来源期刊

Supramolecular Chemistry 化学-化学综合

CiteScore

3.60

自引率

3.00%

发文量

审稿时长

2.7 months

期刊介绍： Supramolecular Chemistry welcomes manuscripts from the fields and sub-disciplines related to supramolecular chemistry and non-covalent interactions. From host-guest chemistry, self-assembly and systems chemistry, through materials chemistry and biochemical systems, we interpret supramolecular chemistry in the broadest possible sense. Interdisciplinary manuscripts are particularly encouraged. Manuscript types include: high priority communications; full papers; reviews, and; Methods papers, techniques tutorials highlighting procedures and technologies that are important to the field. We aim to publish papers in a timely fashion and as soon as a paper has been accepted and typeset it will be published in electronic form on the Latest articles section of the website. The two most important review criteria are that the paper presents high-quality work that fits generally into the broad spectrum of activities in the supramolecular chemistry field. Under normal circumstances, Supramolecular Chemistry does not consider manuscripts that would be more suitable in a highly specialized journal. This includes, but is not limited to, those based mostly or exclusively on topics such as solid state/X-ray structures, computational chemistry, or electrochemistry. . The two most important review criteria are that the paper presents high-quality work that fits generally into the broad spectrum of activities in the supramolecular chemistry field.