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N-doped carbon xerogels as adsorbents for the removal of heavy metal ions from aqueous solution

Comparative studies of the textural properties of carbon xerogel (CX) and commercial activated carbon (AC) demonstrated that CX has higher total pore volume and pore diameter, whereas its adsorption capacity for Pb( ii ) ions in aqueous solution is lower. Herein, the purpose of the present study is... Full description

Journal Title: RSC Advances 2015, Vol.5(10), pp.7182-7191
Main Author: Yang, Bin
Other Authors: Yu, Chengxiang , Yu, Qingni , Zhang, Xingwang , Li, Zhongjian , Lei, Lecheng
Format: Electronic Article Electronic Article
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ID: ISSN: 2046-2069 ; DOI: 10.1039/c4ra12441c
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recordid: rscc4ra12441c
title: N-doped carbon xerogels as adsorbents for the removal of heavy metal ions from aqueous solution
format: Article
creator:
  • Yang, Bin
  • Yu, Chengxiang
  • Yu, Qingni
  • Zhang, Xingwang
  • Li, Zhongjian
  • Lei, Lecheng
subjects:
  • Carbon
  • Heavy Metals
  • Porosity
  • Adsorption
  • Adsorbents
  • Aqueous Solutions
  • Texture
  • Surface Chemistry
  • Chemical and Electrochemical Properties (MD)
  • Chemical and Electrochemical Properties (Ep)
  • Chemical and Electrochemical Properties (Ed)
  • Chemical and Electrochemical Properties (EC)
ispartof: RSC Advances, 2015, Vol.5(10), pp.7182-7191
description: Comparative studies of the textural properties of carbon xerogel (CX) and commercial activated carbon (AC) demonstrated that CX has higher total pore volume and pore diameter, whereas its adsorption capacity for Pb( ii ) ions in aqueous solution is lower. Herein, the purpose of the present study is to improve the adsorption performance by the introduction of N into the CX matrix on the basis of the extraordinary textural property. Accordingly, the surface chemistry, porous texture, and morphology of the obtained N-doped CX (NCX) were modified. The removal efficiencies of Pb, Zn and Cu by NCX were 1.97, 1.67, and 1.64 times of those by CX, respectively. It was found that the surface density of adsorbed metal ions per unit specific surface area of NCX increased as a linear function with the increase in the N content. The adsorption process of Pb( ii ) ions followed the pseudo-second-order kinetics and Langmuir model with a maximum adsorption capacity of 83.8 mg g 1 , indicating that NCX would be a promising adsorbent for removal of heavy metal ions from water.
language:
source:
identifier: ISSN: 2046-2069 ; DOI: 10.1039/c4ra12441c
fulltext: fulltext
issn:
  • 2046-2069
  • 20462069
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titleN-doped carbon xerogels as adsorbents for the removal of heavy metal ions from aqueous solution
creatorYang, Bin ; Yu, Chengxiang ; Yu, Qingni ; Zhang, Xingwang ; Li, Zhongjian ; Lei, Lecheng
ispartofRSC Advances, 2015, Vol.5(10), pp.7182-7191
identifierISSN: 2046-2069 ; DOI: 10.1039/c4ra12441c
descriptionComparative studies of the textural properties of carbon xerogel (CX) and commercial activated carbon (AC) demonstrated that CX has higher total pore volume and pore diameter, whereas its adsorption capacity for Pb( ii ) ions in aqueous solution is lower. Herein, the purpose of the present study is to improve the adsorption performance by the introduction of N into the CX matrix on the basis of the extraordinary textural property. Accordingly, the surface chemistry, porous texture, and morphology of the obtained N-doped CX (NCX) were modified. The removal efficiencies of Pb, Zn and Cu by NCX were 1.97, 1.67, and 1.64 times of those by CX, respectively. It was found that the surface density of adsorbed metal ions per unit specific surface area of NCX increased as a linear function with the increase in the N content. The adsorption process of Pb( ii ) ions followed the pseudo-second-order kinetics and Langmuir model with a maximum adsorption capacity of 83.8 mg g 1 , indicating that NCX would be a promising adsorbent for removal of heavy metal ions from water.
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subjectCarbon ; Heavy Metals ; Porosity ; Adsorption ; Adsorbents ; Aqueous Solutions ; Texture ; Surface Chemistry ; Chemical and Electrochemical Properties (MD) ; Chemical and Electrochemical Properties (Ep) ; Chemical and Electrochemical Properties (Ed) ; Chemical and Electrochemical Properties (EC);
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titleN-doped carbon xerogels as adsorbents for the removal of heavy metal ions from aqueous solution
descriptionComparative studies of the textural properties of carbon xerogel (CX) and commercial activated carbon (AC) demonstrated that CX has higher total pore volume and pore diameter, whereas its adsorption capacity for Pb( ii ) ions in aqueous solution is lower. Herein, the purpose of the present study is to improve the adsorption performance by the introduction of N into the CX matrix on the basis of the extraordinary textural property. Accordingly, the surface chemistry, porous texture, and morphology of the obtained N-doped CX (NCX) were modified. The removal efficiencies of Pb, Zn and Cu by NCX were 1.97, 1.67, and 1.64 times of those by CX, respectively. It was found that the surface density of adsorbed metal ions per unit specific surface area of NCX increased as a linear function with the increase in the N content. The adsorption process of Pb( ii ) ions followed the pseudo-second-order kinetics and Langmuir model with a maximum adsorption capacity of 83.8 mg g 1 , indicating that NCX would be a promising adsorbent for removal of heavy metal ions from water.
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titleN-doped carbon xerogels as adsorbents for the removal of heavy metal ions from aqueous solution
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abstractComparative studies of the textural properties of carbon xerogel (CX) and commercial activated carbon (AC) demonstrated that CX has higher total pore volume and pore diameter, whereas its adsorption capacity for Pb( ii ) ions in aqueous solution is lower. Herein, the purpose of the present study is to improve the adsorption performance by the introduction of N into the CX matrix on the basis of the extraordinary textural property. Accordingly, the surface chemistry, porous texture, and morphology of the obtained N-doped CX (NCX) were modified. The removal efficiencies of Pb, Zn and Cu by NCX were 1.97, 1.67, and 1.64 times of those by CX, respectively. It was found that the surface density of adsorbed metal ions per unit specific surface area of NCX increased as a linear function with the increase in the N content. The adsorption process of Pb( ii ) ions followed the pseudo-second-order kinetics and Langmuir model with a maximum adsorption capacity of 83.8 mg g 1 , indicating that NCX would be a promising adsorbent for removal of heavy metal ions from water.
doi10.1039/c4ra12441c
pages7182-7191