Removal of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent

Copper (Cu(Ⅱ)) pollution has a hazardous effect on human health. However, designing new adsorbents with prominent properties is a tremendous challenge in effectively removing Cu(Ⅱ) ions from the environment. In this study, new adsorbent—MnFe2O4/multi-wall carbon nanotubes (MMWCNTs), with excellent m...

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Autores principales:	Peng Zhao, Tong Geng, Yuwei Zhao, Yimei Tian, Jiaxin Li, Hongwei Zhang, Weigao Zhao
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Multi-walled carbon nanotubes Adsorption Magnetic separation Cu(Ⅱ) MnFe2O4 Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/03d582776b644dcc83a0c85ed88340f1
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id	oai:doaj.org-article:03d582776b644dcc83a0c85ed88340f1
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spelling	oai:doaj.org-article:03d582776b644dcc83a0c85ed88340f12021-11-18T04:53:21ZRemoval of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent2666-821110.1016/j.ceja.2021.100184https://doaj.org/article/03d582776b644dcc83a0c85ed88340f12021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121000995https://doaj.org/toc/2666-8211Copper (Cu(Ⅱ)) pollution has a hazardous effect on human health. However, designing new adsorbents with prominent properties is a tremendous challenge in effectively removing Cu(Ⅱ) ions from the environment. In this study, new adsorbent—MnFe2O4/multi-wall carbon nanotubes (MMWCNTs), with excellent magnetic properties were synthesized and then systematically characterized. Introducing MnFe2O4 addressed the challenge of separating the nano-adsorbent from the liquid medium. Batch adsorption experiment results indicated that effective adsorption occurred in a relatively neutral range (pH=6–8). The adsorption behaviors were consistent with the pseudo-second-order model and the Freundlich model. The maximum adsorption capacity reached 46.41 mg/g at 308 K. The adsorption thermodynamics revealed the endothermic character of adsorption by MMWCNTs, and increasing the temperature benefitted the adsorption process. Furthermore, many surface functional groups of MMWCNTs facilitated adsorption performance. Compared with the MWCNTs before modified, the adsorbent had a nearly tenfold improvement from 3.4% to 34.8% in the removal efficiency of Cu(Ⅱ) ions. These results demonstrated that MMWCNTs are a suitable, efficient adsorbent that can be used in natural water bodies for adsorbing Cu(Ⅱ) ions.Peng ZhaoTong GengYuwei ZhaoYimei TianJiaxin LiHongwei ZhangWeigao ZhaoElsevierarticleMulti-walled carbon nanotubesAdsorptionMagnetic separationCu(Ⅱ)MnFe2O4Chemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100184- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Multi-walled carbon nanotubes Adsorption Magnetic separation Cu(Ⅱ) MnFe2O4 Chemical engineering TP155-156
spellingShingle	Multi-walled carbon nanotubes Adsorption Magnetic separation Cu(Ⅱ) MnFe2O4 Chemical engineering TP155-156 Peng Zhao Tong Geng Yuwei Zhao Yimei Tian Jiaxin Li Hongwei Zhang Weigao Zhao Removal of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent
description	Copper (Cu(Ⅱ)) pollution has a hazardous effect on human health. However, designing new adsorbents with prominent properties is a tremendous challenge in effectively removing Cu(Ⅱ) ions from the environment. In this study, new adsorbent—MnFe2O4/multi-wall carbon nanotubes (MMWCNTs), with excellent magnetic properties were synthesized and then systematically characterized. Introducing MnFe2O4 addressed the challenge of separating the nano-adsorbent from the liquid medium. Batch adsorption experiment results indicated that effective adsorption occurred in a relatively neutral range (pH=6–8). The adsorption behaviors were consistent with the pseudo-second-order model and the Freundlich model. The maximum adsorption capacity reached 46.41 mg/g at 308 K. The adsorption thermodynamics revealed the endothermic character of adsorption by MMWCNTs, and increasing the temperature benefitted the adsorption process. Furthermore, many surface functional groups of MMWCNTs facilitated adsorption performance. Compared with the MWCNTs before modified, the adsorbent had a nearly tenfold improvement from 3.4% to 34.8% in the removal efficiency of Cu(Ⅱ) ions. These results demonstrated that MMWCNTs are a suitable, efficient adsorbent that can be used in natural water bodies for adsorbing Cu(Ⅱ) ions.
format	article
author	Peng Zhao Tong Geng Yuwei Zhao Yimei Tian Jiaxin Li Hongwei Zhang Weigao Zhao
author_facet	Peng Zhao Tong Geng Yuwei Zhao Yimei Tian Jiaxin Li Hongwei Zhang Weigao Zhao
author_sort	Peng Zhao
title	Removal of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent
title_short	Removal of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent
title_full	Removal of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent
title_fullStr	Removal of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent
title_full_unstemmed	Removal of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent
title_sort	removal of cu(ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/03d582776b644dcc83a0c85ed88340f1
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Removal of Cu(Ⅱ) ions from aqueous solution by a magnetic multi-wall carbon nanotube adsorbent

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