Adsorption mechanism of copper and lead ions onto graphene nanosheet/δ-MnO 2

Yueming Ren; Ni Yan; Jing Feng; Jun Ma; Qing Wen; Nan Li; Qing Dong

doi:10.1016/j.matchemphys.2012.07.023

Adsorption mechanism of copper and lead ions onto graphene nanosheet/δ-MnO ₂

Yueming Ren
, Ni Yan
, Jing Feng
, Jun Ma^*
, Qing Wen
, Nan Li
, Qing Dong

^*Corresponding author for this work

School of Environment

Harbin Engineering University
Harbin Institute of Technology
Ltd

Research output: Contribution to journal › Article › peer-review

208 Scopus citations

Abstract

The removal behaviors of Cu(II) and Pb(II) ions onto graphene nanosheet/δ-MnO ₂ (GNS/MnO ₂) adsorbent were investigated under various conditions including contact time and initial metal concentrations. The surface interactions involved in the adsorption process and the regeneration were also explored. The equilibrium adsorption data could be well described by the pseudo-second-order kinetic model and the Langmuir equation. Weber-Morris model suggested that the sorption was a multi-step with the pore and surface diffusion process. The maximum adsorption capacity of GNS/MnO ₂ for Cu(II) and Pb(II) ions were 1620 and 781 μmol g ^-1, respectively. FTIR and XPS studies illuminated that the formation of complexes on GNS/MnO ₂ surface mainly consisted of the oxygen in hydroxyl (C-OH, Mn-OH) and carboxyl groups. Moreover, XRD analysis further confirmed that Cu(II) or Pb(II) could not only adsorb on the surface of GNS/MnO ₂, but also intercalate the layered of MnO ₂. GNS/MnO ₂ can be used four times by HCl solution.

Original language	English
Pages (from-to)	538-544
Number of pages	7
Journal	Materials Chemistry and Physics
Volume	136
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2012.07.023
State	Published - 15 Oct 2012

Keywords

Adsorption
Composite materials
Interfaces
Surface properties

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10.1016/j.matchemphys.2012.07.023

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title = "Adsorption mechanism of copper and lead ions onto graphene nanosheet/δ-MnO 2 ",

abstract = "The removal behaviors of Cu(II) and Pb(II) ions onto graphene nanosheet/δ-MnO 2 (GNS/MnO 2) adsorbent were investigated under various conditions including contact time and initial metal concentrations. The surface interactions involved in the adsorption process and the regeneration were also explored. The equilibrium adsorption data could be well described by the pseudo-second-order kinetic model and the Langmuir equation. Weber-Morris model suggested that the sorption was a multi-step with the pore and surface diffusion process. The maximum adsorption capacity of GNS/MnO 2 for Cu(II) and Pb(II) ions were 1620 and 781 μmol g -1, respectively. FTIR and XPS studies illuminated that the formation of complexes on GNS/MnO 2 surface mainly consisted of the oxygen in hydroxyl (C-OH, Mn-OH) and carboxyl groups. Moreover, XRD analysis further confirmed that Cu(II) or Pb(II) could not only adsorb on the surface of GNS/MnO 2, but also intercalate the layered of MnO 2. GNS/MnO 2 can be used four times by HCl solution.",

keywords = "Adsorption, Composite materials, Interfaces, Surface properties",

author = "Yueming Ren and Ni Yan and Jing Feng and Jun Ma and Qing Wen and Nan Li and Qing Dong",

year = "2012",

month = oct,

day = "15",

doi = "10.1016/j.matchemphys.2012.07.023",

language = "英语",

volume = "136",

pages = "538--544",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

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TY - JOUR

T1 - Adsorption mechanism of copper and lead ions onto graphene nanosheet/δ-MnO 2

AU - Ren, Yueming

AU - Yan, Ni

AU - Feng, Jing

AU - Ma, Jun

AU - Wen, Qing

AU - Li, Nan

AU - Dong, Qing

PY - 2012/10/15

Y1 - 2012/10/15

N2 - The removal behaviors of Cu(II) and Pb(II) ions onto graphene nanosheet/δ-MnO 2 (GNS/MnO 2) adsorbent were investigated under various conditions including contact time and initial metal concentrations. The surface interactions involved in the adsorption process and the regeneration were also explored. The equilibrium adsorption data could be well described by the pseudo-second-order kinetic model and the Langmuir equation. Weber-Morris model suggested that the sorption was a multi-step with the pore and surface diffusion process. The maximum adsorption capacity of GNS/MnO 2 for Cu(II) and Pb(II) ions were 1620 and 781 μmol g -1, respectively. FTIR and XPS studies illuminated that the formation of complexes on GNS/MnO 2 surface mainly consisted of the oxygen in hydroxyl (C-OH, Mn-OH) and carboxyl groups. Moreover, XRD analysis further confirmed that Cu(II) or Pb(II) could not only adsorb on the surface of GNS/MnO 2, but also intercalate the layered of MnO 2. GNS/MnO 2 can be used four times by HCl solution.

AB - The removal behaviors of Cu(II) and Pb(II) ions onto graphene nanosheet/δ-MnO 2 (GNS/MnO 2) adsorbent were investigated under various conditions including contact time and initial metal concentrations. The surface interactions involved in the adsorption process and the regeneration were also explored. The equilibrium adsorption data could be well described by the pseudo-second-order kinetic model and the Langmuir equation. Weber-Morris model suggested that the sorption was a multi-step with the pore and surface diffusion process. The maximum adsorption capacity of GNS/MnO 2 for Cu(II) and Pb(II) ions were 1620 and 781 μmol g -1, respectively. FTIR and XPS studies illuminated that the formation of complexes on GNS/MnO 2 surface mainly consisted of the oxygen in hydroxyl (C-OH, Mn-OH) and carboxyl groups. Moreover, XRD analysis further confirmed that Cu(II) or Pb(II) could not only adsorb on the surface of GNS/MnO 2, but also intercalate the layered of MnO 2. GNS/MnO 2 can be used four times by HCl solution.

KW - Adsorption

KW - Composite materials

KW - Interfaces

KW - Surface properties

UR - https://www.scopus.com/pages/publications/84867405640

U2 - 10.1016/j.matchemphys.2012.07.023

DO - 10.1016/j.matchemphys.2012.07.023

M3 - 文章

AN - SCOPUS:84867405640

SN - 0254-0584

VL - 136

SP - 538

EP - 544

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2-3

ER -

Adsorption mechanism of copper and lead ions onto graphene nanosheet/δ-MnO ₂

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Keywords

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