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Graphene oxide decorated nanoscale iron sulfide for highly efficient scavenging of hexavalent chromium from aqueous solutions.
- Source :
- Journal of Environmental Chemical Engineering; Aug2020, Vol. 8 Issue 4, pN.PAG-N.PAG, 1p
- Publication Year :
- 2020
-
Abstract
- • FeS nanoparticles were effectively decorated onto the surface of GO. • The aggregation of nanoscale FeS decreased with enhanced reactivity. • The nanocomposites GO/FeS displayed an enhanced Cr(VI) sorption capacity. • Both surface sorption and reduction contributed to Cr(VI) removal by GO/FeS. In this paper, a novel graphene oxide (GO) decorated nanoscale FeS composite (GO/FeS) combining both advantages of GO and FeS was synthesized and tested for the highly efficient scavenging of Cr(VI) from aqueous solutions. The as- synthesized materials were characterized by scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), transmission electron microscopy (TEM), atomic force microscopy (AFM), Raman spectra and X-ray photoelectron spectroscopy (XPS) in detail. The results indicated that FeS nanoparticles were effectively decorated onto the surface of GO through −OH, C O, C O, and O=C–O functional groups, resulting in larger specific surface area and higher reactivity The nanocomposites displayed an enhanced Cr(VI) scavenging capacity, and the acidic conditions favored the Cr(VI) scavenging by GO/FeS. The kinetics of Cr(VI) scavenging on GO/FeS nanoparticles was in accordance with the pseudo-second order kinetic model, suggesting that chemical interaction is mainly responsible for Cr(VI) scavenging on GO/FeS. Furthermore, the Langmuir model fit the best, and q max , i.e. the maximum scavenging capacity of Cr(VI) obtained from the Langmuir model reached 138.5 mg/g, Surface sorption and reduction were the dominant scavenging mechanisms for Cr(VI) by GO/FeS. The present study demonstrated the promise of GO/FeS as an effective scavenger for the remediation of Cr(VI) in groundwater environment. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 22133437
- Volume :
- 8
- Issue :
- 4
- Database :
- Supplemental Index
- Journal :
- Journal of Environmental Chemical Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 145212031
- Full Text :
- https://doi.org/10.1016/j.jece.2020.103882