Non-oxidative graphene (nOG) synthesized from natural graphite powder was modified with magnetite (Fe3O4) for removal of Cr(VI) and dyes in aqueous solution. The adsorption behavior of Cr(VI) on Fe3O4/nOG (M-nOG) was systematically investigated, and the simultaneous adsorption of Cr(VI) and dyes such as methylene blue (MB) and rhodamine B (RhB) was evaluated. Adsorption kinetic and isotherm of Cr(VI) were fitted well with pseudo-second-order model and Sips model, respectively. For the binary system, Cr(VI) removal was not affected with increasing the dye concentration, whereas the adsorption capacity of both MB and RhB was enhanced with increasing the concentrations of Cr(VI).
Bibliographical noteFunding Information:
The Mid-career Researcher Program through an NRF grant funded by the Korea Government (MSIP) (2016R1A2B4015598) and a grant from the Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and by Korea Government Ministry of Knowledge Economy (No. 20142010102690) funded this study.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Process Chemistry and Technology
- Filtration and Separation