The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater

Abstract The safe treatment of heavy metals in wastewater is directly related to human health and social development. In this paper, a new type of recyclable adsorbent is synthesized through the oxidation of enhancer and modification with magnetic nanoparticles. The new adsorbent not only inherits t...

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Autores principales: Zhongbing Wang, Wenbin Xu, Fanghui Jie, Zongwen Zhao, Kai Zhou, Hui Liu
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Publicado: Nature Portfolio 2021
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spelling oai:doaj.org-article:d133f8cf5b3d47d1b8d9ea63240dca4d2021-12-02T18:51:42ZThe selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater10.1038/s41598-021-96465-72045-2322https://doaj.org/article/d133f8cf5b3d47d1b8d9ea63240dca4d2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96465-7https://doaj.org/toc/2045-2322Abstract The safe treatment of heavy metals in wastewater is directly related to human health and social development. In this paper, a new type of recyclable adsorbent is synthesized through the oxidation of enhancer and modification with magnetic nanoparticles. The new adsorbent not only inherits the advantages of multiwall carbon nanotubes (6O-MWCNTs), but also exhibits a new magnetic property and further improved adsorption capacity, which is conducive to the magnetic separation and recovery of heavy metals. The adsorption results indicate that multiwall magnetic carbon nanotubes (6O-MWCNTs@Fe3O4) have a good performance for Pb(II) selective adsorption, with a maximum adsorption capacity of 215.05 mg/g, much higher than the existing adsorption capacity of the same type of adsorbents. Under the action of an external magnetic field, 6O-MWCNTs@Fe3O4 that adsorbed metal ions can quickly achieve good separation from the solution. The joint characterization results of FTIR and XPS show that under the action of both coordination and electrostatic attraction, the C=O bond in the –COOH group is induced to open by the metal ions and transforms into an ionic bond, and the metal ions are stably adsorbed on the surface of 6O-MWCNTs@Fe3O4. Pb(II) has a stronger attraction than Cu(II) and Cd(II) to the lone pair of electrons in oxygen atoms to form complexes, due to the covalent index of Pb (6.41) is more larger than that of Cu (2.98) and Cd (2.71).These data provide a new type of recyclable adsorbent for the efficient treatment of heavy metal ions in wastewater and enrich relevant theoretical knowledge.Zhongbing WangWenbin XuFanghui JieZongwen ZhaoKai ZhouHui LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Zhongbing Wang
Wenbin Xu
Fanghui Jie
Zongwen Zhao
Kai Zhou
Hui Liu
The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater
description Abstract The safe treatment of heavy metals in wastewater is directly related to human health and social development. In this paper, a new type of recyclable adsorbent is synthesized through the oxidation of enhancer and modification with magnetic nanoparticles. The new adsorbent not only inherits the advantages of multiwall carbon nanotubes (6O-MWCNTs), but also exhibits a new magnetic property and further improved adsorption capacity, which is conducive to the magnetic separation and recovery of heavy metals. The adsorption results indicate that multiwall magnetic carbon nanotubes (6O-MWCNTs@Fe3O4) have a good performance for Pb(II) selective adsorption, with a maximum adsorption capacity of 215.05 mg/g, much higher than the existing adsorption capacity of the same type of adsorbents. Under the action of an external magnetic field, 6O-MWCNTs@Fe3O4 that adsorbed metal ions can quickly achieve good separation from the solution. The joint characterization results of FTIR and XPS show that under the action of both coordination and electrostatic attraction, the C=O bond in the –COOH group is induced to open by the metal ions and transforms into an ionic bond, and the metal ions are stably adsorbed on the surface of 6O-MWCNTs@Fe3O4. Pb(II) has a stronger attraction than Cu(II) and Cd(II) to the lone pair of electrons in oxygen atoms to form complexes, due to the covalent index of Pb (6.41) is more larger than that of Cu (2.98) and Cd (2.71).These data provide a new type of recyclable adsorbent for the efficient treatment of heavy metal ions in wastewater and enrich relevant theoretical knowledge.
format article
author Zhongbing Wang
Wenbin Xu
Fanghui Jie
Zongwen Zhao
Kai Zhou
Hui Liu
author_facet Zhongbing Wang
Wenbin Xu
Fanghui Jie
Zongwen Zhao
Kai Zhou
Hui Liu
author_sort Zhongbing Wang
title The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater
title_short The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater
title_full The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater
title_fullStr The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater
title_full_unstemmed The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater
title_sort selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/d133f8cf5b3d47d1b8d9ea63240dca4d
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