Revolutionizing the aptitude of nanoscale magnetic porous 3D graphene for continuous removal of Congo red from aqueous environments: Insights from RSM methodology

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-05-29 DOI:10.1016/j.micromeso.2025.113705

Manijeh Tavana, Nasser Arsalani

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引用次数: 0

Abstract

The present work addresses the issue of environmental contamination caused by coloured pollutants, explicitly focusing on eliminating Congo Red (CR), an azo dye known for its stability and non-biodegradability, from water sources. The challenges associated with conventional adsorption methods are articulated, leading to the introduction of a new magnetic porous three-dimensional graphene nanohybrid (MnFe₂O₄-3DG) for dye removal. The synthesis of three-dimensional graphene (3DG) and the MnFe₂O₄-3DG nanohybrid was characterized using various techniques like FTIR, SEM- EDX, EDS, TEM, XRD, BET, VSM, TGA, and UV–Vis spectroscopy. Experimental optimization is executed with Response Surface Methodology (RSM) to assess the influence of crucial parameters such as pH, contact time, temperature, initial concentration, and adsorbent dose on removal efficiency. The MnFe₂O₄-3DG nanohybrid, under optimal conditions such as an initial concentration of 20 mg/L, a pH of 7, a contact time of 60 min, and an adsorbent dose of 0.4 g/L, exhibits a remarkable removal efficiency of 94.15 %, thus, this result fits well with the Langmuir model (R² = 0.999), and kinetic analysis indicates a pseudo-second-order (R² = 0.999), intra particle diffusion (R² = 0.887) reactions. Thermodynamic studies reveal an exothermic adsorption process. Based on the findings, the MnFe₂O₄-3DG nanohybrid is noted as a highly effective and cost-efficient adsorbent for water purification systems. The results indicate that the nanohybrid mentioned will have a high potential for use in large-scale and industrial water and wastewater treatment systems. In addition, it offers an effective solution to eliminating environmental pollution caused by coloured pollutants, such as Congo red.

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革命性的纳米级磁性多孔3D石墨烯在水环境中连续去除刚果红的能力：来自RSM方法的见解

目前的工作解决了由有色污染物引起的环境污染问题，明确侧重于从水源中消除刚果红（CR），一种以其稳定性和不可生物降解性而闻名的偶氮染料。本文阐述了传统吸附方法所面临的挑战，并引入了一种新的磁性多孔三维石墨烯纳米杂化物（MnFe2O4-3DG）来去除染料。采用FTIR、SEM- EDX、EDS、TEM、XRD、BET、VSM、TGA、UV-Vis等技术对三维石墨烯（3DG）和MnFe2O4-3DG纳米杂化物的合成进行了表征。采用响应面法（RSM）进行实验优化，评估pH、接触时间、温度、初始浓度和吸附剂剂量等关键参数对去除效率的影响。在初始浓度为20 mg/L、pH = 7、接触时间为60 min、吸附剂用量为0.4 g/L的最佳条件下，MnFe2O4-3DG纳米杂化物的去除率为94.15%，符合Langmuir模型（R2 = 0.999），动力学分析显示为准二级反应（R2 = 0.999），颗粒内扩散反应（R2 = 0.887）。热力学研究揭示了一个放热吸附过程。基于这些发现，MnFe2O4-3DG纳米杂化物被认为是一种高效且经济的水净化系统吸附剂。结果表明，所述纳米杂化物在大规模和工业水和废水处理系统中具有很高的应用潜力。此外，它还为消除刚果红等有色污染物对环境的污染提供了有效的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.