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首页> 外文期刊>Journal of the Taiwan Institute of Chemical Engineers >Solvo-thermal synthesis, characterization of aluminon-functionalized magnetic nanoparticles and investigation of its adsorption performance for Cr(VI) and Cr(III)
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Solvo-thermal synthesis, characterization of aluminon-functionalized magnetic nanoparticles and investigation of its adsorption performance for Cr(VI) and Cr(III)

机译：溶剂热合成，铝功能化磁性纳米粒子的表征及其对Cr（VI）和Cr（III）的吸附性能的研究

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摘要

The aluminon functionalized MNPs (Fe3O4@aluminon) as a novel magnetic nano-sorbent have been synthesized by a simple hydro-thermal method for the removal of Cr(VI) and Cr(III) from aqueous solution. Fe3O4@aluminon MNPs were characterized using SEM, HRTEM, FUR, VSM and TGA techniques. The Fe3O4@aluminon nano-sorbent has good dispersibility and valuable magnetic property. The effects of pH, equilibration time, mass of nano-sorbent and initial concentration of adsorbate on the percentage recovery of Cr(VI) and Cr(III) by Fe3O4@aluminon were investigated. The adsorption equilibrium was attained in 20 min at 25 degrees C and the adsorption kinetics obeyed the pseudo-second order model. The experimental data for the adsorption of Cr(VI) and Cr(III) better fitted the Langmuir isotherm and the maximum adsorption capacities were 263.2 mg/g for Cr(VI) at pH 1.0 and 400.0 mg/g for Cr(III) at pH 7.0. The adsorption-desorption cycles revealed that Fe3O4@aluminon nanoparticles had high stability and appropriate reusability. The removal efficiencies of chromium ions from different water samples were successfully accomplished (similar to 95.0-96.7 +/- 1.4-2.1%). (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：通过一种简单的水热法从水溶液中去除Cr（VI）和Cr（III），合成了铝官能化的MNP（Fe3O4 @铝）作为一种新型的磁性纳米吸附剂。用SEM，HRTEM，FUR，VSM和TGA技术对Fe3O4 @铝MNPs进行了表征。 Fe3O4 @铝纳米吸附剂具有良好的分散性和有价值的磁性。考察了pH，平衡时间，纳米吸附剂质量和吸附物初始浓度对Fe3O4 @铝对Cr（VI）和Cr（III）的回收率的影响。在25℃下20分钟内达到吸附平衡，并且吸附动力学服从拟二级模型。更好地适应Langmuir等温线吸附Cr（VI）和Cr（III）的实验数据，在pH 1.0时对Cr（VI）的最大吸附容量为263.2 mg / g，在pH为1.0时Cr（III）的最大吸附容量为400.0 mg / g pH值7.0。吸附-解吸循环表明Fe3O4 @铝纳米粒子具有较高的稳定性和适当的可重复使用性。已成功实现了从不同水样中去除铬离子的效率（类似于95.0-96.7 +/- 1.4-2.1％）。 （C）2015台湾化学工程师学会。由Elsevier B.V.发布。保留所有权利。

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