用胺基团功能化的磁性介孔二氧化硅可高效去除重金属和抑制细菌生长

IF 2.7 4区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Fahimeh Salari Goharrizi, S. Yousef Ebrahimipour, Hadi Ebrahimnejad, S. Jamilaldin Fatemi
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引用次数: 0

摘要

本研究调查了具有胺基团功能的磁性介孔二氧化硅(MMS-NH2)的开发情况,以了解其在去除重金属和抑制细菌方面的综合能力,从而应对关键的水处理挑战。我们成功合成了 MMS-NH2,并利用各种技术对其进行了细致的表征:利用场发射扫描电子显微镜 (FESEM) 分析形貌,利用布鲁纳-埃美特-泰勒 (BET) 分析表面积和孔隙率,利用 X 射线衍射 (XRD) 分析结晶度,利用傅立叶变换红外光谱 (FTIR) 鉴定官能团,利用热重分析 (TGA) 分析热稳定性,利用振动样品磁力计 (VSM) 分析磁性能。系统研究了 MMS-NH2 对水中五种常见重金属(铅(II)、铜(II)、镍(II)、汞(II)和镉(II))的去除效率。吸附剂用量(0.05-2 g.L-1)、溶液 pH 值(2-10)和初始金属离子浓度(50-200 mg.L-1)对吸附过程的影响,揭示了每种金属离子的最佳吸附条件。采用等温线模型(Langmuir、Freundlich、Dubinin-Radushkevich)来了解吸附机理,结果表明这是一个有利的单层化学吸附过程。动力学模型(假一阶、假二阶、埃洛维奇)被用来研究吸附动力学,表明这是一种快速的化学吸附控制机制。计算得出的热力学参数(ΔG°、ΔH°和ΔS°)证实了吸附过程的自发和放热性质。此外,还研究了 MMS-NH2 对革兰氏阴性菌(大肠杆菌)和革兰氏阳性菌(金黄色葡萄球菌)的抗菌活性。结果表明,对这两种细菌菌株的抑制率都很高,从 70% 到 90% 不等。胺基团功能化可提高重金属吸附能力和细菌抑制能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Magnetic Mesoporous Silica Functionalized with Amine Groups for Efficient Removal of Heavy Metals and Bacterial Inhibition

Magnetic Mesoporous Silica Functionalized with Amine Groups for Efficient Removal of Heavy Metals and Bacterial Inhibition

This study investigates the development of magnetic mesoporous silica functionalized with amine groups (MMS-NH2) for its combined capability in heavy metal removal and bacterial inhibition, aiming to address critical water treatment challenges. MMS-NH2 was successfully synthesized and meticulously characterized using various techniques: Field Emission Scanning Electron Microscopy (FESEM) for morphology, Brunauer-Emmett-Teller (BET) analysis for surface area and porosity, X-ray diffraction (XRD) for crystallinity, Fourier Transform Infrared (FTIR) spectroscopy for functional group identification, Thermogravimetric Analysis (TGA) for thermal stability, and Vibrating Sample Magnetometry (VSM) for magnetic properties. The removal efficiency of five common heavy metals (Pb(II), Cu(II), Ni(II), Hg(II), and Cd(II)) from water using MMS-NH2 was investigated. influence of adsorbent dosage (0.05–2 g.L− 1), solution pH (2–10), and initial metal ion concentration (50–200 mg.L− 1) on the adsorption process was systematically investigated, revealing optimal conditions for each metal ion. Isotherm models (Langmuir, Freundlich, Dubinin-Radushkevich) were employed to understand the adsorption mechanism, indicating a favorable and monolayer chemisorption process. Kinetic models (pseudo-first-order, pseudo-second-order, Elovich) were used to study the adsorption kinetics, suggesting a rapid and chemisorption-controlled mechanism. Thermodynamic parameters (ΔG°, ΔH°, and ΔS°) were calculated, confirming the spontaneous and exothermic nature of the adsorption process. Furthermore, the antibacterial activity of MMS-NH2 was investigated against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria. The results demonstrated significant inhibition rates, ranging from 70 to 90%, for both bacterial strains. The amine group functionalization is attributed to enhancing both heavy metal adsorption capacity and bacterial inhibition.

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来源期刊
Journal of Cluster Science
Journal of Cluster Science 化学-无机化学与核化学
CiteScore
6.70
自引率
0.00%
发文量
166
审稿时长
3 months
期刊介绍: The journal publishes the following types of papers: (a) original and important research; (b) authoritative comprehensive reviews or short overviews of topics of current interest; (c) brief but urgent communications on new significant research; and (d) commentaries intended to foster the exchange of innovative or provocative ideas, and to encourage dialogue, amongst researchers working in different cluster disciplines.
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