Fabrication and adsorption properties of magnetic graphene oxide nanocomposites for removal of arsenic (V) from water

Abstract

In this work, magnetic graphene oxide nanocomposites were synthesized by co-precipitation method and used as an adsorbent for removal of arsenic (V) ions from water. The structure and morphology of magnetic graphene oxide nanocomposites were studied by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, Brunauer–Emmett–Teller specific surface area, and vibrating sample magnetometry. Fourier transform infrared spectroscopy, X-ray diffraction, and transmission electron microscopy results of magnetic graphene oxide presented that the Fe3O4 nanoparticles in the size range of 10–25 nm were decorated on graphene oxide nanosheets. The adsorption properties of magnetic graphene oxide nanocomposites for arsenic (V) from water were investigated to study the effects of magnetic graphene oxide mass ratio, contact time, pH, and initial concentration. The suitable magnetic graphene oxide mass ratio of nanocomposites for arsenic (V) adsorption was determined to be 4:1 (FG2). The adsorption process on FG2 followed a pseudo-second-order kinetic and well fitted in to Langmuir isotherm model with the maximum adsorption capacity of 69.44 mg/g at pH 3. Accordingly, FG2 could be used as an effective adsorbent for removal of arsenic (V) from water.

Removal of Arsenic from Wastewater Using Hydrochar Prepared from Red Macroalgae: Investigating Its Adsorption Efficiency and Mechanism

“…Moreover, Cheng et al [79] used iron oxide nanoparticles for As removal and highlighted that the sorption isotherms were found to be well described by the Langmuir equation, which yielded a maximum sorption capability of 83 mg g −1 for As (V) at a pH of 3 and 42 mg g −1 for As (III) at a pH of 7. The adsorption process on FG2 was found to follow a pseudo-second-order kinetic model and was well fitted in the Langmuir isotherm, with a maximum adsorption capacity of 69.44 mg g −1 at a pH of 3 [80]. Correspondingly, other studies that used different materials for As adsorption and for which adsorption fitted the Langmuir isotherm are mentioned in Table 1.…”

Multifunctional and self-healable conductive IPN hydrogels functionalized with reduced magnetite graphene oxide for an advanced flexible all in one solid-state supercapacitor

“…S2(b), ESI†), and this shows that the Fe 2 O 3 nanoparticles (NPs) are homogeneously incorporated which in turn enhances and increases the GO sheet spacing among the interlayers. 39 Similarly, the XRD patterns of GG-PVA-b and rMGO-GG/PVA-b samples are shown in Fig. S2(c) and (d) (ESI†), respectively.…”

Nickel ferrite nanoparticles‐doped graphene oxide as a heterogeneous Fenton catalyst: Synthesis, characterization, and catalytic application

“…Energy (keV) NiFe2O4/GO 2.38 [29] CoFe2O4/GO 4.48 [30] MnFe2O4/GO 12.75 [31] The specific surface area of NG3, NiFe2O4, and GO materials were 88.77, 82.16, and 84.67 m 2 /g, respectively as demonstrated in table 3. The results show that the specific surface area of NG3 is higher than that of GO and NiFe2O4, which can be explained that NiFe2O4 particles formed on the surface of GO sheets increase the surface area of NG3 material.…”