Preparation of a novel graphene oxide/Fe-Mn composite and its application for aqueous Hg(II) removal

Tang, Jingchun, Huang, Yao, Gong, Yanyan, Lyu, Honghong, Wang, Qilin and Ma, Jianli (2016) Preparation of a novel graphene oxide/Fe-Mn composite and its application for aqueous Hg(II) removal. Journal of Hazardous Materials, 316 151-158. doi:10.1016/j.jhazmat.2016.05.028


Author Tang, Jingchun
Huang, Yao
Gong, Yanyan
Lyu, Honghong
Wang, Qilin
Ma, Jianli
Title Preparation of a novel graphene oxide/Fe-Mn composite and its application for aqueous Hg(II) removal
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 1873-3336
0304-3894
Publication date 2016-10-05
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2016.05.028
Open Access Status Not Open Access
Volume 316
Start page 151
End page 158
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2017
Language eng
Formatted abstract
A novel graphene oxide/Fe-Mn (GO/Fe-Mn) composite was synthesized (molar ratio of Fe/Mn = 3/1 and mass ratio of Fe/GO = 1/7.5) and investigated for the sorption characteristics and mechanisms of aqueous mercury (Hg2+) as well as the biological effects to wheat and rice. Characterization tests showed that Fe-Mn oxides were impregnated onto GO sheets in an amorphous form through oxygen-containing functional groups (i.e., Cdouble bond; length as m-dashO, epoxy Csingle bondOsingle bondC, carboxyl Odouble bond; length as m-dashCsingle bondO, and Csingle bondO) and π-π interactions. GO/Fe-Mn possessed large surface area, surface enhanced Raman scattering with more sp3 defects, and greater thermal stability than GO. XPS analysis revealed that Fe2O3, FeOOH, MnO2, MnOOH, and MnO were the dominant metal oxides in GO/Fe-Mn. Pseudo-second-order kinetic model and Sips isotherm model fitted well with the sorption kinetic and isotherm data. The maximum sorption capacity for mercury was 32.9 mg/g. Ligand exchange and surface complexation were the dominant mechanisms for mercury removal. GO/Fe-Mn greatly reduced the bioavailability of mercury to wheat and rice, even promoted the seedling growth. This work suggests that GO/Fe-Mn can be used as an effective and environmental-friendly adsorbent in heavy metal remediation.
Keyword Graphene oxide/Fe-Mn
Mercury removal
Water treatment
Sorption
Biological effects
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
 
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Created: Mon, 25 Jul 2016, 13:09:47 EST by Qilin Wang on behalf of Advanced Water Management Centre