Adsorption behavior of EDTA-graphene oxide for Pb (II) removal

Clemonne J. Madadrang; Hyun Yun Kim; Guihua Gao; Ning Wang; Jun Zhu; Huan Feng; Matthew Gorring; Marc L. Kasner; Shifeng Hou

doi:10.1021/am201645g

Adsorption behavior of EDTA-graphene oxide for Pb (II) removal

Clemonne J. Madadrang, Hyun Yun Kim, Guihua Gao, Ning Wang, Jun Zhu, Huan Feng, Matthew Gorring, Marc L. Kasner, Shifeng Hou

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

807 Scopus citations

Abstract

Chelating groups are successfully linked to graphene oxide (GO) surfaces through a silanization reaction between N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and hydroxyl groups on GO surface. EDTA-GO was found to be an ideal adsorbent for Pb(II) removal with a higher adsorption capacity. EDTA-modification enhances the adsorption capacity of GO because of the chelating ability of ethylene diamine triacetic acid. This study investigates the adsorption and desorption behaviors of heavy metal cations and the effects of solution conditions such as pH on Pb(II) removal. The adsorption capacity for Pb(II) removal was found to be 479 ± 46) mg/g at pH 6.8, and the adsorption process was completed within 20 min. The Langmuir adsorption model agrees well with the experimental data. The experimental results suggest that EDTA-GO can be reused after washed with HCl, suggesting potential applications in the environmental cleanup.

Original language	English
Pages (from-to)	1186-1193
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	4
Issue number	3
DOIs	https://doi.org/10.1021/am201645g
State	Published - 28 Mar 2012

Keywords

EDTA
adsorbents
graphene oxide
lead

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10.1021/am201645g

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title = "Adsorption behavior of EDTA-graphene oxide for Pb (II) removal",

abstract = "Chelating groups are successfully linked to graphene oxide (GO) surfaces through a silanization reaction between N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and hydroxyl groups on GO surface. EDTA-GO was found to be an ideal adsorbent for Pb(II) removal with a higher adsorption capacity. EDTA-modification enhances the adsorption capacity of GO because of the chelating ability of ethylene diamine triacetic acid. This study investigates the adsorption and desorption behaviors of heavy metal cations and the effects of solution conditions such as pH on Pb(II) removal. The adsorption capacity for Pb(II) removal was found to be 479 ± 46) mg/g at pH 6.8, and the adsorption process was completed within 20 min. The Langmuir adsorption model agrees well with the experimental data. The experimental results suggest that EDTA-GO can be reused after washed with HCl, suggesting potential applications in the environmental cleanup.",

keywords = "EDTA, adsorbents, graphene oxide, lead",

author = "Madadrang, {Clemonne J.} and Kim, {Hyun Yun} and Guihua Gao and Ning Wang and Jun Zhu and Huan Feng and Matthew Gorring and Kasner, {Marc L.} and Shifeng Hou",

year = "2012",

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doi = "10.1021/am201645g",

language = "English",

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T1 - Adsorption behavior of EDTA-graphene oxide for Pb (II) removal

AU - Madadrang, Clemonne J.

AU - Kim, Hyun Yun

AU - Gao, Guihua

AU - Wang, Ning

AU - Zhu, Jun

AU - Feng, Huan

AU - Gorring, Matthew

AU - Kasner, Marc L.

AU - Hou, Shifeng

PY - 2012/3/28

Y1 - 2012/3/28

N2 - Chelating groups are successfully linked to graphene oxide (GO) surfaces through a silanization reaction between N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and hydroxyl groups on GO surface. EDTA-GO was found to be an ideal adsorbent for Pb(II) removal with a higher adsorption capacity. EDTA-modification enhances the adsorption capacity of GO because of the chelating ability of ethylene diamine triacetic acid. This study investigates the adsorption and desorption behaviors of heavy metal cations and the effects of solution conditions such as pH on Pb(II) removal. The adsorption capacity for Pb(II) removal was found to be 479 ± 46) mg/g at pH 6.8, and the adsorption process was completed within 20 min. The Langmuir adsorption model agrees well with the experimental data. The experimental results suggest that EDTA-GO can be reused after washed with HCl, suggesting potential applications in the environmental cleanup.

AB - Chelating groups are successfully linked to graphene oxide (GO) surfaces through a silanization reaction between N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and hydroxyl groups on GO surface. EDTA-GO was found to be an ideal adsorbent for Pb(II) removal with a higher adsorption capacity. EDTA-modification enhances the adsorption capacity of GO because of the chelating ability of ethylene diamine triacetic acid. This study investigates the adsorption and desorption behaviors of heavy metal cations and the effects of solution conditions such as pH on Pb(II) removal. The adsorption capacity for Pb(II) removal was found to be 479 ± 46) mg/g at pH 6.8, and the adsorption process was completed within 20 min. The Langmuir adsorption model agrees well with the experimental data. The experimental results suggest that EDTA-GO can be reused after washed with HCl, suggesting potential applications in the environmental cleanup.

KW - EDTA

KW - adsorbents

KW - graphene oxide

KW - lead

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U2 - 10.1021/am201645g

DO - 10.1021/am201645g

M3 - Article

C2 - 22304446

AN - SCOPUS:84859143925

SN - 1944-8244

VL - 4

SP - 1186

EP - 1193

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 3

ER -

Adsorption behavior of EDTA-graphene oxide for Pb (II) removal

Abstract

Keywords

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