Insight into Structural Features of Magnetic Kaolinite Nanocomposite and Its Potential for Methylene Blue Dye Removal from Aqueous Solution

Izzan Salwana Izman, M. Johan, R. Rusmin
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引用次数: 1

Abstract

An in-depth understanding on the structural features of engineered magnetic adsorbent is important for forecasting its efficiencies for environmental clean-up studies. A magnetic kaolinite nanocomposite (MKN) was prepared using Malaysia’s natural kaolinite via co-precipitation method with a three different clay: iron oxide mass ratio (MKN 1:1, MKN 2:1 and MKN 5:1). The morphology and structural features of the magnetic composites were systematically investigated using techniques, such as: Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), surface area analysis (BET), Vibrating Sample Magnetometer (VSM), and zeta potential measurement. The removal efficiencies of the adsorbent for Methylene Blue (MB) dye were studied in batch method as a function of pH and initial concentration. MKN1:1 demonstrated the highest magnetisation susceptibility (Ms) of 35.9 emu/g with four-fold-increase in specific surface area as compared to the pristine kaolinite. Preliminary experiment reveals that all MKNs showed almost 100% removal of MB at low initial concentration (<50 ppm). The spent MKN adsorbent demonstrated an easy recovery via external magnetic field separation and recorded maximum adsorption capacity of 18.1 mg/g. This research gives an insight on the surface characteristics of magnetic clay composite for potential application as an effective and low-cost adsorbent in treating dye contaminated water. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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磁性高岭土纳米复合材料的结构特征及其从水溶液中去除亚甲基蓝染料的潜力
深入了解工程磁性吸附剂的结构特征对于预测其在环境净化研究中的效率非常重要。以马来西亚天然高岭土为原料,采用共沉淀法,以三种不同的粘土与氧化铁质量比(MKN 1:1、MKN 2:1和MKN 5:1)制备了磁性高岭土纳米复合材料(MKN)。采用傅立叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)、比表面积分析(BET)、振动样品磁强计(VSM)和ζ电位测量等技术,系统地研究了磁性复合材料的形貌和结构特征。采用分批法研究了吸附剂对亚甲基蓝(MB)染料的去除效率与pH和初始浓度的关系。MKN1:1表现出最高的磁化率(Ms)为35.9emu/g,比表面积比原始高岭石增加了四倍。初步实验表明,在低初始浓度(<50ppm)下,所有MKN对MB的去除率几乎为100%。废MKN吸附剂通过外部磁场分离显示出易于回收,并记录了18.1mg/g的最大吸附容量。本研究深入了解了磁性粘土复合材料的表面特性,作为一种有效且低成本的吸附剂,有可能在处理染料污染的水中应用。版权所有©2022作者,BCREC集团出版。这是CC BY-SA许可证下的开放访问文章(https://creativecommons.org/licenses/by-sa/4.0)。
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
CiteScore
3.20
自引率
6.70%
发文量
52
审稿时长
12 weeks
期刊介绍: Bulletin of Chemical Reaction Engineering & Catalysis, a reputable international journal, provides a forum for publishing the novel technologies related to the catalyst, catalysis, chemical reactor, kinetics, and chemical reaction engineering. Scientific articles dealing with the following topics in chemical reaction engineering, catalysis science and engineering, catalyst preparation method and characterization, novel innovation of chemical reactor, kinetic studies, etc. are particularly welcome. However, articles concerned on general chemical engineering process are not covered and out of scope of this journal
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