Characteristics and mechanism of Pb(II) adsorption/desorption on GO/r-GO under sulfide-reducing conditions

Jianfeng Zhang; Xiaodan Xie; Cheng Liang; Weihuang Zhu; Xiaoguang Meng

doi:10.1016/j.jiec.2019.01.029

Characteristics and mechanism of Pb(II) adsorption/desorption on GO/r-GO under sulfide-reducing conditions

Jianfeng Zhang
, Xiaodan Xie
, Cheng Liang
, Weihuang Zhu
, Xiaoguang Meng

Department of Civil, Environmental and Ocean Engineering

Xi'an University of Architecture and Technology

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

24 Scopus citations

Abstract

Compared with graphene oxide (GO), r-GO (the reduced form) has a lower adsorption capacity for heavy metal ions and, therefore, generates concern over the release of adsorbed contaminants when GO adsorbent is discharged into a reducing environment. This study reveals that the maximum adsorption capacity of Pb(II) on GO and r-GO was 937.65 and 92.99 mg g ⁻¹ respectively. GO was reduced to r-GO by sulfide, causing 2.59–6.46% of the adsorbed Pb(II) to be released and was stably dispersed as a Pb(II)-oxidative debris (OD) complex. Our results provide valuable information about heavy metal transportation in environments containing GO under different redox conditions.

Original language	English
Pages (from-to)	233-240
Number of pages	8
Journal	Journal of Industrial and Engineering Chemistry
Volume	73
DOIs	https://doi.org/10.1016/j.jiec.2019.01.029
State	Published - 25 May 2019

Keywords

Adsorption/desorption characteristic
Graphene oxide
Pb(II)
Sulfide-reduced graphene oxide

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10.1016/j.jiec.2019.01.029

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title = "Characteristics and mechanism of Pb(II) adsorption/desorption on GO/r-GO under sulfide-reducing conditions",

abstract = " Compared with graphene oxide (GO), r-GO (the reduced form) has a lower adsorption capacity for heavy metal ions and, therefore, generates concern over the release of adsorbed contaminants when GO adsorbent is discharged into a reducing environment. This study reveals that the maximum adsorption capacity of Pb(II) on GO and r-GO was 937.65 and 92.99 mg g −1 respectively. GO was reduced to r-GO by sulfide, causing 2.59–6.46\% of the adsorbed Pb(II) to be released and was stably dispersed as a Pb(II)-oxidative debris (OD) complex. Our results provide valuable information about heavy metal transportation in environments containing GO under different redox conditions.",

keywords = "Adsorption/desorption characteristic, Graphene oxide, Pb(II), Sulfide-reduced graphene oxide",

author = "Jianfeng Zhang and Xiaodan Xie and Cheng Liang and Weihuang Zhu and Xiaoguang Meng",

note = "Publisher Copyright: {\textcopyright} 2019 The Korean Society of Industrial and Engineering Chemistry",

year = "2019",

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doi = "10.1016/j.jiec.2019.01.029",

language = "English",

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T1 - Characteristics and mechanism of Pb(II) adsorption/desorption on GO/r-GO under sulfide-reducing conditions

AU - Zhang, Jianfeng

AU - Xie, Xiaodan

AU - Liang, Cheng

AU - Zhu, Weihuang

AU - Meng, Xiaoguang

PY - 2019/5/25

Y1 - 2019/5/25

N2 - Compared with graphene oxide (GO), r-GO (the reduced form) has a lower adsorption capacity for heavy metal ions and, therefore, generates concern over the release of adsorbed contaminants when GO adsorbent is discharged into a reducing environment. This study reveals that the maximum adsorption capacity of Pb(II) on GO and r-GO was 937.65 and 92.99 mg g −1 respectively. GO was reduced to r-GO by sulfide, causing 2.59–6.46% of the adsorbed Pb(II) to be released and was stably dispersed as a Pb(II)-oxidative debris (OD) complex. Our results provide valuable information about heavy metal transportation in environments containing GO under different redox conditions.

AB - Compared with graphene oxide (GO), r-GO (the reduced form) has a lower adsorption capacity for heavy metal ions and, therefore, generates concern over the release of adsorbed contaminants when GO adsorbent is discharged into a reducing environment. This study reveals that the maximum adsorption capacity of Pb(II) on GO and r-GO was 937.65 and 92.99 mg g −1 respectively. GO was reduced to r-GO by sulfide, causing 2.59–6.46% of the adsorbed Pb(II) to be released and was stably dispersed as a Pb(II)-oxidative debris (OD) complex. Our results provide valuable information about heavy metal transportation in environments containing GO under different redox conditions.

KW - Adsorption/desorption characteristic

KW - Graphene oxide

KW - Pb(II)

KW - Sulfide-reduced graphene oxide

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U2 - 10.1016/j.jiec.2019.01.029

DO - 10.1016/j.jiec.2019.01.029

M3 - Article

AN - SCOPUS:85061112334

SN - 1226-086X

VL - 73

SP - 233

EP - 240

JO - Journal of Industrial and Engineering Chemistry

JF - Journal of Industrial and Engineering Chemistry

ER -

Characteristics and mechanism of Pb(II) adsorption/desorption on GO/r-GO under sulfide-reducing conditions

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Keywords

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