Adsorption performance and mechanism of magnetic reduced graphene oxide in glyphosate contaminated water.

Environmental Science and Pollution Research International
Yajuan LiYuesuo Yang

Abstract

In this study, the magnetic reduced graphene oxide (RGO/Fe3O4), with easy separation and high adsorption performance, was prepared and used to treat glyphosate (GLY) contaminated water. GLY adsorption performance of RGO/Fe3O4 was investigated, and influences of pH, adsorption time, temperature, contaminant concentration, and competing anions were analyzed. Moreover, the adsorption mechanism was discussed in the light of several characterization methods, including scanning electron microscopy (SEM), energy dispersive spectrum (EDS), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The results demonstrated that the RGO/Fe3O4 presented a significant GLY adsorption capacity and acid condition was beneficial for this adsorption. The pseudo-second-order kinetic model and the Langmuir model correlated satisfactorily to the experimental data, indicating that this process was controlled by chemical adsorption and monolayer adsorption. Thermodynamic studies revealed that the adsorption of glyphosate onto RGO/Fe3O4 was spontaneous, endothermic, and feasible process. High temperatures were beneficial to GLY adsorption. The GLY adsorption mechanism of RGO/Fe3O4 was mainly attributed to hydrogen-bon...Continue Reading

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Citations

Feb 23, 2019·Environmental Science and Pollution Research International·Fang WangZhong-Liang Wang
Nov 10, 2020·Environmental Science and Pollution Research International·Joshua O IghaloMary A Ajala
Dec 2, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Patricio J Espinoza-MonteroJose L Paz

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