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Removal of Mercury (II) by EDTA-Functionalized Magnetic CoFe(2)O(4)@SiO(2) Nanomaterial with Core-Shell Structure

In order to reduce the difficulty and risk of operation, decrease the preparation time and improve the adsorption performance of magnetic nano-silicon adsorbent with core-shell structure, a carboxylated CoFe(2)O(4)@SiO(2) was prepared by EDTA-functionalized method using a safe, mild and simple hydro...

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Detalles Bibliográficos
Autores principales: Xia, Kai, Guo, Yongfu, Shao, Qijun, Zan, Qu, Bai, Renbi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915675/
https://www.ncbi.nlm.nih.gov/pubmed/31671771
http://dx.doi.org/10.3390/nano9111532
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author Xia, Kai
Guo, Yongfu
Shao, Qijun
Zan, Qu
Bai, Renbi
author_facet Xia, Kai
Guo, Yongfu
Shao, Qijun
Zan, Qu
Bai, Renbi
author_sort Xia, Kai
collection PubMed
description In order to reduce the difficulty and risk of operation, decrease the preparation time and improve the adsorption performance of magnetic nano-silicon adsorbent with core-shell structure, a carboxylated CoFe(2)O(4)@SiO(2) was prepared by EDTA-functionalized method using a safe, mild and simple hydrothermal method. The results show that the prepared material of CoFe(2)O(4)@SiO(2)-EDTA has a maximum adsorption capacity of 103.3 mg/g for mercury ions (Hg(II)) at pH = 7. The adsorption process of Hg(II) is a chemical reaction involving chelation and single-layer adsorption, and follows the pseudo-second-order kinetic and Langmuir adsorption isotherm models. Moreover, the removal of Hg(II) is a spontaneous and exothermic reaction. The material characterization, before and after adsorption, shows that CoFe(2)O(4)@SiO(2)-EDTA has excellent recyclability, hydrothermal stability and fully biodegradable properties. To summarize, it is a potential adsorption material for removing heavy metals from aqueous solutions in practical applications.
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spelling pubmed-69156752019-12-24 Removal of Mercury (II) by EDTA-Functionalized Magnetic CoFe(2)O(4)@SiO(2) Nanomaterial with Core-Shell Structure Xia, Kai Guo, Yongfu Shao, Qijun Zan, Qu Bai, Renbi Nanomaterials (Basel) Article In order to reduce the difficulty and risk of operation, decrease the preparation time and improve the adsorption performance of magnetic nano-silicon adsorbent with core-shell structure, a carboxylated CoFe(2)O(4)@SiO(2) was prepared by EDTA-functionalized method using a safe, mild and simple hydrothermal method. The results show that the prepared material of CoFe(2)O(4)@SiO(2)-EDTA has a maximum adsorption capacity of 103.3 mg/g for mercury ions (Hg(II)) at pH = 7. The adsorption process of Hg(II) is a chemical reaction involving chelation and single-layer adsorption, and follows the pseudo-second-order kinetic and Langmuir adsorption isotherm models. Moreover, the removal of Hg(II) is a spontaneous and exothermic reaction. The material characterization, before and after adsorption, shows that CoFe(2)O(4)@SiO(2)-EDTA has excellent recyclability, hydrothermal stability and fully biodegradable properties. To summarize, it is a potential adsorption material for removing heavy metals from aqueous solutions in practical applications. MDPI 2019-10-29 /pmc/articles/PMC6915675/ /pubmed/31671771 http://dx.doi.org/10.3390/nano9111532 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xia, Kai
Guo, Yongfu
Shao, Qijun
Zan, Qu
Bai, Renbi
Removal of Mercury (II) by EDTA-Functionalized Magnetic CoFe(2)O(4)@SiO(2) Nanomaterial with Core-Shell Structure
title Removal of Mercury (II) by EDTA-Functionalized Magnetic CoFe(2)O(4)@SiO(2) Nanomaterial with Core-Shell Structure
title_full Removal of Mercury (II) by EDTA-Functionalized Magnetic CoFe(2)O(4)@SiO(2) Nanomaterial with Core-Shell Structure
title_fullStr Removal of Mercury (II) by EDTA-Functionalized Magnetic CoFe(2)O(4)@SiO(2) Nanomaterial with Core-Shell Structure
title_full_unstemmed Removal of Mercury (II) by EDTA-Functionalized Magnetic CoFe(2)O(4)@SiO(2) Nanomaterial with Core-Shell Structure
title_short Removal of Mercury (II) by EDTA-Functionalized Magnetic CoFe(2)O(4)@SiO(2) Nanomaterial with Core-Shell Structure
title_sort removal of mercury (ii) by edta-functionalized magnetic cofe(2)o(4)@sio(2) nanomaterial with core-shell structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915675/
https://www.ncbi.nlm.nih.gov/pubmed/31671771
http://dx.doi.org/10.3390/nano9111532
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