Ultrasonic assisted adsorptive removal of toxic heavy metals from environmental samples using functionalized silica-coated magnetic multiwall carbon nanotubes (MagMWCNTs@SiO2)

Q2 Engineering

Engineering in Agriculture, Environment and Food Pub Date : 2019-10-01 DOI:10.1016/j.eaef.2019.07.002

Ensieh Ghasemi , Akbar Heydari , Mika Sillanpää

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引用次数: 4

Abstract

In this approach, an amino-functionalized silica coated multiwall carbon nanotube (AminMagMWCNTs@SiO₂), for the first time, was rationally designed, prepared, and then investigated as an adsorbent for the adsorption and removal of Pb (II) and Cd (II) from environmental samples. The properties of synthesized magnetic nanoadsorbents were analyzed by Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The diameter of magnetic nanoadsorbents was in the range of 60–80 nm. The effects of various parameters on the adsorption efficiency were simultaneously studied using a chemometric design. The variables of interest were the amount of nanoadsorbent, pH and ultrasonication time. The experimental parameters were optimized using a Box–Behnken design and the response surface equations were derived. The removal of magnetic nanoadsorbents from the aqueous solution was simply achieved by applying an external magnetic field following the adsorption process. The adsorption efficiencies of AminMagMWCNTs@SiO₂ nanoadsorbent for Pb (II) and Cd (II) ions were in the range of 98–104% under the optimum condition. The results demonstrated that the amino-functionalized MagMWCNTs@SiO₂ nanoadsorbent could be used as a simple, efficient, regenerable and cost-consuming material for the removal of desired heavy metal ions from environmental water and soil samples.

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功能化二氧化硅涂层磁性多壁碳纳米管在超声辅助下吸附去除环境样品中的有毒重金属(MagMWCNTs@SiO2)

本文首次合理设计、制备了氨基功能化二氧化硅包覆的多壁碳纳米管(AminMagMWCNTs@SiO2)，并对其作为吸附和去除环境样品中Pb (II)和Cd (II)的吸附剂进行了研究。采用傅里叶变换红外光谱(FT-IR)、x射线粉末衍射(XRD)、透射电子显微镜(TEM)和扫描电子显微镜(SEM)对合成的磁性纳米吸附剂的性能进行了分析。磁性纳米吸附剂的粒径在60 ~ 80 nm之间。采用化学计量设计同时研究了各参数对吸附效率的影响。考察了纳米吸附剂用量、pH值和超声处理时间。采用Box-Behnken设计优化了实验参数，推导了响应面方程。磁性纳米吸附剂的去除是通过在吸附过程后施加外磁场来实现的。在最佳条件下，AminMagMWCNTs@SiO2纳米吸附剂对Pb (II)和Cd (II)离子的吸附效率在98 ~ 104%之间。结果表明，氨基功能化MagMWCNTs@SiO2纳米吸附剂可以作为一种简单、高效、可再生、低成本的材料，用于去除环境水和土壤样品中的重金属离子。

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来源期刊

Engineering in Agriculture, Environment and Food Engineering-Industrial and Manufacturing Engineering

CiteScore

1.00

自引率

0.00%

发文量

期刊介绍： Engineering in Agriculture, Environment and Food (EAEF) is devoted to the advancement and dissemination of scientific and technical knowledge concerning agricultural machinery, tillage, terramechanics, precision farming, agricultural instrumentation, sensors, bio-robotics, systems automation, processing of agricultural products and foods, quality evaluation and food safety, waste treatment and management, environmental control, energy utilization agricultural systems engineering, bio-informatics, computer simulation, computational mechanics, farm work systems and mechanized cropping. It is an international English E-journal published and distributed by the Asian Agricultural and Biological Engineering Association (AABEA). Authors should submit the manuscript file written by MS Word through a web site. The manuscript must be approved by the author''s organization prior to submission if required. Contact the societies which you belong to, if you have any question on manuscript submission or on the Journal EAEF.