Characterization of functionalized multiwalled carbon nanotubes and application as an effective filter for heavy metal removal from aqueous solutions

doi:10.1016/j.cjche.2016.05.017

›› 2016, Vol. 24 ›› Issue (12): 1695-1702.DOI: 10.1016/j.cjche.2016.05.017

• Separation Science and Engineering • 上一篇下一篇

Characterization of functionalized multiwalled carbon nanotubes and application as an effective filter for heavy metal removal from aqueous solutions

Emad. M. Elsehly^1,2, N. G. Chechenin^1,3, A. V. Makunin¹, H. A. Motaweh², E. A. Vorobyeva¹, K. A. Bukunov^1,3, E. G. Leksina¹, A. B. Priselkova¹

1 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Russia;
2 Faculty of Science, Damanhour University, Egypt;
3 Faculty of Physics, Lomonosov Moscow State University, Russia

收稿日期:2016-03-05 修回日期:2016-05-23 出版日期:2016-12-28 发布日期:2017-01-04
通讯作者: Emad.M. Elsehly,E-mail address:elsehlyfigo@yahoo.com
基金资助:
Supported by the Program of MSU Development and Russian Foundation for Basic Research (RFBR) (No. 14-02-01230a and No. 14-02-31147 mol_a).

Characterization of functionalized multiwalled carbon nanotubes and application as an effective filter for heavy metal removal from aqueous solutions

Emad. M. Elsehly^1,2, N. G. Chechenin^1,3, A. V. Makunin¹, H. A. Motaweh², E. A. Vorobyeva¹, K. A. Bukunov^1,3, E. G. Leksina¹, A. B. Priselkova¹

1 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Russia;
2 Faculty of Science, Damanhour University, Egypt;
3 Faculty of Physics, Lomonosov Moscow State University, Russia

Received:2016-03-05 Revised:2016-05-23 Online:2016-12-28 Published:2017-01-04
Supported by:
Supported by the Program of MSU Development and Russian Foundation for Basic Research (RFBR) (No. 14-02-01230a and No. 14-02-31147 mol_a).

摘要/Abstract

摘要： Filtration efficiency of Ni(II) from aqueous solution using pristine and modified MWCNTs filters was investigated as a function of Ni(II) ion concentration, pH, and filter mass. MWCNTs were synthesized by CVD method and modified using two complementary treatments, purification (using a mixture of hydrochloric acid and hydrogen peroxide) and functionalization (using nitric acid). The effect and mechanism of each treatment on the structural integrity of pristine MWCNTs has been studied. Morphology of the pristine and modified filters was investigated by Raman Spectrometry (RS), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), Fourier Transform Infrared (FTIR) spectrometry and Thermogravimetric analysis. It was found from Raman spectra that the ratio of the intensity of D-band to that of G-band decreased by purification process, and increased by functionalization process. The adsorption mechanism of Ni(II) onto the surface functional groups of modified MWCNTs was confirmed by FTIR spectrum. The filtration results showed that the removal efficiency of Ni(II) is strongly dependent on pH and could reach 85% at pH=8. Also, modified MWCNT filters can be reused through many cycles of regeneration with high performance. Functionalized MWCNTs filters may be a promising adsorbent candidate for heavy metal removal from wastewater.

关键词: MWCNTs filters, Functionalization, Nickel removal, Filtration, Raman spectrometry, Purification

Abstract: Filtration efficiency of Ni(II) from aqueous solution using pristine and modified MWCNTs filters was investigated as a function of Ni(II) ion concentration, pH, and filter mass. MWCNTs were synthesized by CVD method and modified using two complementary treatments, purification (using a mixture of hydrochloric acid and hydrogen peroxide) and functionalization (using nitric acid). The effect and mechanism of each treatment on the structural integrity of pristine MWCNTs has been studied. Morphology of the pristine and modified filters was investigated by Raman Spectrometry (RS), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), Fourier Transform Infrared (FTIR) spectrometry and Thermogravimetric analysis. It was found from Raman spectra that the ratio of the intensity of D-band to that of G-band decreased by purification process, and increased by functionalization process. The adsorption mechanism of Ni(II) onto the surface functional groups of modified MWCNTs was confirmed by FTIR spectrum. The filtration results showed that the removal efficiency of Ni(II) is strongly dependent on pH and could reach 85% at pH=8. Also, modified MWCNT filters can be reused through many cycles of regeneration with high performance. Functionalized MWCNTs filters may be a promising adsorbent candidate for heavy metal removal from wastewater.

Key words: MWCNTs filters, Functionalization, Nickel removal, Filtration, Raman spectrometry, Purification

Emad. M. Elsehly, N. G. Chechenin, A. V. Makunin, H. A. Motaweh, E. A. Vorobyeva, K. A. Bukunov, E. G. Leksina, A. B. Priselkova. Characterization of functionalized multiwalled carbon nanotubes and application as an effective filter for heavy metal removal from aqueous solutions[J]. , 2016, 24(12): 1695-1702.

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Characterization of functionalized multiwalled carbon nanotubes and application as an effective filter for heavy metal removal from aqueous solutions

Characterization of functionalized multiwalled carbon nanotubes and application as an effective filter for heavy metal removal from aqueous solutions

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