A new functionalized reduced graphene oxide adsorbent for removing heavy metal ions in water via coordination and ion exchange

Heavy metal ion pollution has become a serious problem. In this paper, a new type of adsorbent, reduced graphene oxide grafted by 4-sulfophenylazo groups (RGOS), was synthesized to adsorb heavy metal ions in an aqueous solution via two kinds of adsorption modes, ion exchange and coordination. The ma...

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Published inSeparation science and technology Vol. 53; no. 18; pp. 2896 - 2905
Main Authors Zhang, Chao-Zhi, Chen, Bin, Bai, Yuan, Xie, Jing
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 12.12.2018
Taylor & Francis Ltd
Subjects
Adsorbents
Adsorption
Aqueous solutions
Cadmium
Chemical synthesis
Chromium
coordination
Copper
Data processing
Fourier transforms
Graphene
heavy metal ion
Heavy metals
Infrared analysis
Infrared spectra
Infrared spectroscopy
Ion exchange
Ions
Lead
Metal ions
Nickel
reduced graphene oxide
Water pollution
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Summary:Heavy metal ion pollution has become a serious problem. In this paper, a new type of adsorbent, reduced graphene oxide grafted by 4-sulfophenylazo groups (RGOS), was synthesized to adsorb heavy metal ions in an aqueous solution via two kinds of adsorption modes, ion exchange and coordination. The maximum adsorption capacities of the RGOS for Pb(II), Cu(II), Ni(II), Cd(II) and Cr(III) were 689, 59, 66, 267 and 191 mg/g, respectively. Adsorption equilibrium time of RGOS for heavy metal ions is no more than 10 min. Adsorption mechanism was supposed based on elemental analyses, adsorption data, and Fourier transform infrared spectra.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2018.1497655