Performance and Mechanism of Layered Double Hydroxide to Remove Graphene Oxide in Aqueous Solution

Kang, Haibo; Gu, Jiahui; Liu, Gang; Li, Ben; Wang, Wei

doi:10.46488/nept.2021.v20i01.006

Cited by 6 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of other studies are summarized in Table 6 [ 63 , 64 , 65 ]. Due to factors such as insufficient theoretical knowledge and the limitations of experimental conditions, the study can also explore the adsorption properties of GO on different types of clay minerals.…”

Section: Discussionmentioning

confidence: 99%

Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution

Fang

Jiang

et al. 2022

IJERPH

Self Cite

View full text Add to dashboard Cite

In order to remove toxic graphene oxide (GO) from aqueous solution, attapulgite (ATP) was used as adsorbent to recycle it by adsorption. In this paper, the effects of different pH, adsorbent mass, GO concentration, time and temperature on the adsorption of GO by attapulgite were studied, and the adsorption performance and mechanism were further explored by XRD, AFM, XPS, FTIR, TEM and SEM tests. The results show that when T = 303 K, pH = 3, and the GO concentration is 100 mg/L in 50 mL of aqueous solution, the removal rate of GO by 40 mg of attapulgite reaches 92.83%, and the partition coefficient Kd reaches 16.31. The adsorption kinetics results showed that the adsorption equilibrium was reached at 2160 min, and the adsorption process could be described by the pseudo-second-order adsorption equation, indicating that the adsorption process was accompanied by chemical adsorption and physical adsorption. The isotherm and thermodynamic parameters show that the adsorption of GO by attapulgite is more consistent with the Langmuir isotherm model, and the reaction is a spontaneous endothermic process. The analysis shows that attapulgite is a good material for removing GO, which can provide a reference for the removal of GO in an aqueous environment.

show abstract

Section: Discussionmentioning

confidence: 99%

Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution

Fang

Jiang

et al. 2022

IJERPH

Self Cite

View full text Add to dashboard Cite

show abstract

“…The fitting formula of the adsorption isotherm (Langmuir, Freundlich and Temkin) model is as follows (Eqs. (4)–(6)) [23]: (4) 1 q e = 1 q m + 1 K L × q m × 1 C e , (5) ln q e = ln K F + 1 n × ln C e , (6) q e = K T × lnf + K T × ln C e , where K L is the adsorption equilibrium constant of Langmuir, K F is the adsorption equilibrium constant of Freundlich, and K T is the adsorption equilibrium constant of Temkin.…”

Section: Methodsmentioning

confidence: 99%

“…The fitting formula of the adsorption isotherm (Langmuir, Freundlich and Temkin) model is as follows (Eqs. (4)-( 6)) [23]:…”

Section: Characterizationmentioning

confidence: 99%

Study on the Adsorption Mechanism of Graphene Oxide by Calcareous Sand in South China Sea

Luo

et al. 2021

Adsorption Science & Technology

View full text Add to dashboard Cite

To remove graphene oxide from wastewater, we used batch experiments with calcareous sand to recover GO. The adsorption properties and mechanisms of GO by calcareous sand were investigated by different characterization techniques. In this paper, the relationship between the coagulation of GO on calcareous sand and pH, calcareous sand content, GO initial concentration, and temperature was studied. The results show that calcareous sand can effectively adsorb GO from aqueous solution, the interaction of GO with calcareous sand achieved interaction equilibrium in 5 h, and the adsorption of GO by calcareous sand strongly depends on pH. The isotherm data fitted to a Langmuir equation. A possible mechanism can be expressed from FT-IR, XRD, Raman spectra, SEM, EDS, TEM, AFM, and XPS results. The test results indicate that calcareous sand is a potentially recoverable GO material.

show abstract

“…First, it was found that the spectra of iron tailings and GO/iron tailings were similar, but the absorption peaks corresponding to different functional groups were different. Among them, the bands at 3450 cm −1 approximately were assigned to O−H stretching and bending vibrations [24]. The peaks at 1570 cm −1 were associated with the C=C stretching vibrations [25].…”

Section: Ft-irmentioning

confidence: 99%

Study on the Adsorption Properties of Iron Tailings for GO

et al. 2021

Self Cite

View full text Add to dashboard Cite

Iron tailings can be used as adsorbents to effectively remove graphene oxide (GO) in aqueous solutions. Experimental data show that pH, iron tailing quality, GO concentration and temperature have significant effects on the removal of GO, the adsorption of the tail involves a single layer adsorbed Langmuir model with exothermic reaction, and it compliance with the proposed dynamics model meets the requirements, the adsorption process is a spontaneous physical adsorption process. Combining scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) to analyze the iron tail according to the mechanisms of ore adsorption of GO, it was concluded that iron tailings might be a very promising material to effectively remove GO in aqueous solutions. The results of this research provide key information for the transportation and potential fate of GO in the natural environment.

show abstract

Performance and Mechanism of Layered Double Hydroxide to Remove Graphene Oxide in Aqueous Solution

Cited by 6 publications

References 0 publications

Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution

Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution

Study on the Adsorption Mechanism of Graphene Oxide by Calcareous Sand in South China Sea

Study on the Adsorption Properties of Iron Tailings for GO

Contact Info

Product

Resources

About