Decontamination of U(VI) on graphene oxide/Al2 O3 composites investigated by XRD, FT-IR and XPS techniques

Environmental Pollution
Lei ZhangYubing Sun

Abstract

The decontamination of U(VI) on graphene oxide/nano-alumina (GO/Al2O3) composites were investigated by batch, XRD, FT-IR and XPS techniques. The characterization results showed that GO/Al2O3 composites presented a variety of oxygen-containing functional groups, which provided the more surface reactive sites. The batch experiments indicated that sorption equilibrium of U(VI) on GO/Al2O3 composites was achieved within 30 min, and the maximum sorption capacity derived from Langmuir model was 142.8 mg/g at pH 6.5. In addition, the slight decrease of sorption capacity was observed even after fifth recycling times. These results indicated that GO/Al2O3 composites displayed the fast sorption rate, high sorption capacity and good regeneration performance. No effect of ionic strength revealed the inner-sphere surface complexation of U(VI) on GO/Al2O3 composites. FT-IR and XPS analysis demonstrated that the high adsorption of U(VI) on GO/Al2O3 was attributed to the various oxygen-bearing functional groups. In addition, the nano Al2O3 was transferred to amorphous AlO(OH) mineral phase by XRD pattern, which provided the additional reactive sorption sites. These observations indicated that GO-based composites can be regarded as a promising ...Continue Reading

Citations

May 10, 2020·Environmental Science and Pollution Research International·Jin-Hui YangShi-Qing Hu
Dec 4, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Liying WangLixin Zhang
May 4, 2020·Journal of Photochemistry and Photobiology. B, Biology·Hongxue WangAli Fakhri
Jan 16, 2021·Chemosphere·Yubing Sun, Ying Li
Apr 9, 2021·Chemosphere·Han GuoYubing Sun
Jun 3, 2021·International Journal of Environmental Research and Public Health·Haiyan SongNiandong Guo

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