Comparative evaluation of magnetite-graphene oxide and magnetite-reduced graphene oxide composite for As(III) and As(V) removal

Yeojoon Yoon, Won Kyu Park, Tae Mun Hwang, Dae Ho Yoon, Woo Seok Yang, Joon Wun Kang

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

Arsenic removal using Fe3O4-graphene oxide composite (M-GO) and Fe3O4-reduced graphene oxide composite (M-rGO) was investigated. The M-GO was more effective to adsorb both As(III) and As(V) than M-rGO, because the more functional groups existing on the M-GO could lead to synthesize more Fe3O4 with M-GO. As(III) was more favorable to be adsorbed than As(V) onto both M-GO and M-rGO. According to the effect of pH on arsenic removal, the electrostatic interaction between the positively charged surface of Fe3O4-graphene based adsorbents and anionic As(V) species was a major factor to adsorb As(V). The adsorption mechanism of As(III), on the other hand, was strongly affected by a surface complexation, rather than electrostatic interactions. Consequently, in terms of the process energy consumption, energy saving could be achieved via omitting the reduction process to fabricate M-rGO from M-GO and the pre-oxidation process to convert As(III) to As(V).

Original languageEnglish
Pages (from-to)196-204
Number of pages9
JournalJournal of Hazardous Materials
Volume304
DOIs
Publication statusPublished - 2016 Mar 5

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Ferrosoferric Oxide
Graphite
Magnetite
Oxides
Graphene
magnetite
arsenic
Arsenic
oxide
Coulomb interactions
Static Electricity
Composite materials
complexation
functional group
Complexation
adsorption
oxidation
Adsorbents
Functional groups
Adsorption

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Yoon, Yeojoon ; Park, Won Kyu ; Hwang, Tae Mun ; Yoon, Dae Ho ; Yang, Woo Seok ; Kang, Joon Wun. / Comparative evaluation of magnetite-graphene oxide and magnetite-reduced graphene oxide composite for As(III) and As(V) removal. In: Journal of Hazardous Materials. 2016 ; Vol. 304. pp. 196-204.
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Comparative evaluation of magnetite-graphene oxide and magnetite-reduced graphene oxide composite for As(III) and As(V) removal. / Yoon, Yeojoon; Park, Won Kyu; Hwang, Tae Mun; Yoon, Dae Ho; Yang, Woo Seok; Kang, Joon Wun.

In: Journal of Hazardous Materials, Vol. 304, 05.03.2016, p. 196-204.

Research output: Contribution to journalArticle

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AU - Yang, Woo Seok

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