TITLE

Adsorption of Hg(II) from aqueous solution using amino-functionalized graphite nanosheets decorated with Fe 3 O 4 nanoparticles

AUTHOR(S)
Ma, Yingxia; La, Peiqing; Lei, Wenjuan; Lu, Cuiping; Du, Xueyan
PUB. DATE
March 2016
SOURCE
Desalination & Water Treatment;Mar2016, Vol. 57 Issue 11, p5004
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this study, the property of 3-aminopropyltriethoxysilane modified graphite nanosheets (GNS) decorated with Fe3O4nanoparticles (Fe3O4-GNS-NH2hybrids) for adsorption of Hg(II) in aqueous solution were evaluated by batch methods. The adsorption mechanism was also studied by X-ray photoelectron spectroscopy. The effect of factors, such as pH, contact time, initial concentration of Hg(II) and the GNS content (wt.%) for Fe3O4in Fe3O4-GNS-NH2hybrid materials on Hg(II) removal were investigated. The equilibrium data were analyzed using the Langmuir and Freundlich isotherm models. The pseudo-first-order adsorption and the pseudo-second-order adsorption models were used to fit kinetics experimental data. The results showed that the main adsorption mechanism for Hg(II) was the formation of N-metal ions chemical complex, the solution pH value had a major impact on Hg(II) adsorption with optimal removal observed around pH 4.0–6.0, the Langmuir isotherm model was found to be suitable for the Hg(II) adsorption and the adsorption kinetic followed the pseudo-second-order equation for Fe3O4-GNS-NH2hybrid materials.
ACCESSION #
112235169

 

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