磁性纳米复合材料有效去除水中孔雀石绿:合成、表征及平衡研究

IF 2.8 4区 工程技术 Q2 CHEMISTRY, APPLIED
Ali Q. Alorabi
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引用次数: 15

摘要

本文通过化学活化JPL和原位共沉淀Fe3O4,成功制备了磁化活化的朱柏(Fe3O4@AJPL)叶片。研究了Fe3O4@AJPL纳米复合材料对孔雀石绿(MG)染料的去除效果。对制备的Fe3O4@AJPL吸附剂进行了SEM、EDX、TEM、XRD、FTIR、TGA、BET等表征。Fe3O4@AJPL纳米复合材料的BET比表面积和孔径分别为38.44 m2/g和10.6 nm。XRD和FTIR结果表明形成了Fe3O4@AJPL纳米复合材料。通过对溶液pH(3-8)、吸附剂用量(10-100 mg)、温度(25-45°C)、接触时间(5-240 min)、初始mg浓度(20-350 mg/L)等参数进行优化,发现Fe3O4@AJPL去除mg染料的效果分别为7、50 mg、45°C、120 min和150 mg/L。非线性等温线和动力学研究更符合二阶动力学和Langmuir等温线模型,在45°C时单层吸附容量最大为318.3 mg/g,大大优于以往报道的磁性纳米复合吸附剂。EDX分析证实,吸附MG后,Fe3O4@AJPL表面存在氮。计算得到的热力学因子为吸热自发过程。用90%乙醇溶液解吸Fe3O4@AJPL中MG染料。最后,可以得出结论,所设计的Fe3O4@AJPL磁性纳米复合材料将是一种具有成本效益和前景的吸附剂,用于去除水介质中的MG。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effective Removal of Malachite Green from Aqueous Solutions Using Magnetic Nanocomposite: Synthesis, Characterization, and Equilibrium Study
In this work, magnetized activated Juniperus procera leaves (Fe3O4@AJPL) were successfully prepared via chemical activation of JPL and in situ coprecipitation with Fe3O4. A Fe3O4@AJPL nanocomposite was successfully applied for the elimination of malachite green (MG) dye from aqueous media. The prepared Fe3O4@AJPL adsorbent was characterized by SEM, EDX, TEM, XRD, FTIR, TGA, and BET surface area analyses. The BET surface area and pore size of the Fe3O4@AJPL nanocomposite were found to be 38.44 m2/g and 10.6 nm, respectively. The XRD and FTIR results indicated the formation of a Fe3O4@AJPL nanocomposite. Different parameters, such as pH of the solution (3–8), adsorbent dosage (10–100 mg), temperature (25–45°C), contact time (5-240 min), and initial MG concentrations (20–350 mg/L), for the elimination of the MG dye using Fe3O4@AJPL were optimized and found to be 7, 50 mg, 45°C, 120 min, and 150 mg/L, respectively. The nonlinear isotherm and kinetic studies exhibited a better fitting to second-order kinetic and Langmuir isotherm models, with a maximum monolayer adsorption capacity of 318.3 mg/g at 45°C, which was highly superior to the previously reported magnetic nanocomposite adsorbents. EDX analyses confirmed the presence of nitrogen on the Fe3O4@AJPL surface after MG adsorption. The calculated thermodynamic factors indicated endothermic and spontaneous processes. The desorption of MG dye from Fe3O4@AJPL was performed using a solution of 90% ethanol. Finally, it could be concluded that the designed Fe3O4@AJPL magnetic nanocomposite will be a cost-effective and promising adsorbent for the elimination of MG from aqueous media.
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来源期刊
Adsorption Science & Technology
Adsorption Science & Technology 工程技术-工程:化工
CiteScore
5.00
自引率
10.30%
发文量
181
审稿时长
4.5 months
期刊介绍: Adsorption Science & Technology is a peer-reviewed, open access journal devoted to studies of adsorption and desorption phenomena, which publishes original research papers and critical review articles, with occasional special issues relating to particular topics and symposia.
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