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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)233-240
Number of pages8
JournalJournal of Industrial and Engineering Chemistry
Volume73
DOIs
StatePublished - May 25 2019

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Sulfides
Oxides
Graphene
Desorption
Adsorption
Heavy Metals
Heavy metals
Heavy ions
Debris
Adsorbents
Metal ions
Impurities

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Cite this

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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.",
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Characteristics and mechanism of Pb(II) adsorption/desorption on GO/r-GO under sulfide-reducing conditions. / Zhang, Jianfeng; Xie, Xiaodan; Liang, Cheng; Zhu, Weihuang; Meng, Xiaoguang.

In: Journal of Industrial and Engineering Chemistry, Vol. 73, 25.05.2019, p. 233-240.

Research output: Contribution to journalArticle

TY - JOUR

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

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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.

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