Adsorption kinetics, isotherms and thermodynamics of Cr(III) on graphene oxide

Yang, Shuang; Li, Lingyun; Pei, Zhiguo; Li, Chunmei; Lv, Jitao; Xie, Jieli; Wen, Bin; Zhang, Shuzhen

doi:10.1016/j.colsurfa.2014.05.062

Cited by 110 publications

(32 citation statements)

References 33 publications

(43 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…25 22.94 Diatomaceous earth clay (DAT) [21] 19.608 14.225 DAT-Hexadecyltrimethylammonium Bromide [21] 24.271 22.779 GO [22] -92.65 Lonicera japonica flower powder [23] 19.61 -Porous NiFe 2 O 4 [24] 48.98 -Celtek clay [25] 18 …”

Section: Pb(ii) Cr(iii)mentioning

confidence: 99%

Enhanced Adsorption Removal of Pb(II) and Cr(III) by Using Nickel Ferrite-Reduced Graphene Oxide Nanocomposite

Lingamdinne

Kim

et al. 2017

Metals

View full text Add to dashboard Cite

Abstract:The heavy metals, such as Pb(II) and radioisotope Cr(III), in aqueous solutions are toxic even at trace levels and have caused adverse health impacts on human beings. Hence the removal of these heavy metals from the aqueous environment is of the utmost importance to protect biodiversity, hydrosphere ecosystems, and human beings. In this study, the reduced graphene oxide based inverse spinel nickel ferrite (rGONF) nanocomposite has been prepared and was utilized for the removal of Pb(II) and Cr(III) from aqueous solutions. The prepared rGONF has been confirmed by X-ray photoelectron (XPS) and Raman spectroscopy. The surface characteristics of rGONF were measured by scanning electron microscopy (SEM), High-Resolution Transmission Electron Microscope (HR-TEM), and Brunauer-Emmett-Teller (BET) surface analysis. The average particle size of rGONF was found to be 32.0 ± 2.0 nm. The surface site density for the specific surface area (Ns) of rGONF was found to be 0.00238 mol·g −1 , which was higher than that of the graphene oxide (GO) and NiFe 2 O 4 , which was expected. The prepared rGONF has been successfully applied for the removal of Pb(II) and Cr(III) by batch mode. The batch adsorption studies concluded that the adsorption of Pb(II) and Cr(III) onto rGONF was rapid and the adsorption percentage was more than 99% for both metal ions. The adsorption isotherm results found that the adsorptive removal of both metal ions onto rGONF occurred through monolayer adsorption on a homogeneous surface of rGONF. The pH-edge adsorption results suggest the adsorption occurs through an inner-sphere surface complex, which is proved by 2-pKa-diffusion model fitting, where the pH-edge adsorption data was well fitted. The adsorption of metal ions increased with increasing temperature. The overall obtained results demonstrated that the rGONF was an effective adsorbent for Pb(II) and Cr(III) removal from wastewater.

show abstract

Section: Pb(ii) Cr(iii)mentioning

confidence: 99%

Enhanced Adsorption Removal of Pb(II) and Cr(III) by Using Nickel Ferrite-Reduced Graphene Oxide Nanocomposite

Lingamdinne

Kim

et al. 2017

Metals

View full text Add to dashboard Cite

show abstract

“…Yang et al employed GO to remove Cr(III) from water. 12 Tan et al also reported the removal of Ni(II) and Cd(II) from aqueous solutions using GO materials. 13 Nevertheless, it is difficult to separate GO from aqueous media aer adsorption due to its low specic weight and small particle size.…”

Section: 10mentioning

confidence: 99%

Adsorption of mercury(ii) with an Fe₃O₄ magnetic polypyrrole–graphene oxide nanocomposite

et al. 2017

View full text Add to dashboard Cite

To enhance the ability to remove mercury(II) from aqueous media, an Fe 3 O 4 magnetic nanocomposite (PPy-GO) composed of polypyrrole (PPy) and graphene oxide (GO) was synthesized in situ and characterized via scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectrometry (XPS), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), zeta potential analysis, vibrating sample magnetometer (VSM) and the Brunauer-Emmett-Teller (BET) method. The performance of the magnetic PPy-GO for adsorbing mercury(II) from water along with the effects of solution pH, adsorbent dosage, coexisting ions, reaction time and temperature were studied in detail. The adsorption kinetics, isotherms and thermodynamics were investigated in detail to gain insights into the adsorption process. The results show that the BET surface area of the magnetic PPy-GO reached 1737.6 m 2 g À1. The Langmuir capacity of the magnetic PPy-GO for mercury(II) adsorption was 400.0 mg g À1 at 300 K and pH 7 AE 0.1.After adsorption, the magnetic PPy-GO nanocomposite could be efficiently separated from water via a magnetic field. The adsorption process was endothermic and spontaneous and occurred in accord with the Langmuir and pseudo-second-order models. The overall adsorption of mercury(II) not only involved chemisorption, but was also partially governed by intra-particle diffusion. Data from the preliminary application of magnetic PPy-GO to remove heavy metals from real electroplating effluent indicated a high removal efficiency of over 99% for mercury(II). Finally, a possible adsorption mechanism was discussed. All data showed that the magnetic PPy-GO material is a promising adsorbent to remove mercury(II) from aqueous media.

show abstract

“…The difference between the initial concentration and the equilibrium concentration was used to determine the amount of adsorbed Na ? , Yang et al 2014.…”

Section: Kinetic and Isothermal Studymentioning

confidence: 99%

Characterization and evaluation of amorphous carbon thin film (ACTF) for sodium ion adsorption

et al. 2017

View full text Add to dashboard Cite

The removal of sodium ions from aqueous solutions by adsorption onto amorphous carbon thin film (ACTF) has been studied in batch mode. In this work, the ACTF as new adsorbent was synthesized based on rice straw, then its structure and properties were taken into consideration to study its ability to adsorb sodium ions from synthetic water. The influence of pH, contact time, and temperature of the ion adsorption on ACTF was also studied using batch tests. We found that the contact time of sodium adsorption and its isothermal adsorption studied were described by pseudo-second-order kinetic model and Langmuir isotherm, respectively. Our results indicated that the adsorption of sodium ions on ACTF become be stronger and depends on pH, furthermore, the maximum adsorption capacities of sodium on ACTF recorded 107, 120 and 135 mg g -1 at 35, 45, and 65°C. The thermodynamic parameters explain that the adsorption of sodium ions on ACTF is a spontaneous process and endothermic reaction. According to adsorption studies, we found that the ACTF can be used effectively for ion chromatography or desalinate sodium ion using ion exchange process in the hybrid desalination process with insignificant loss of adsorption capacity. However, the ACTF has better properties than any other carbon materials obtained from an agricultural byproduct.

show abstract

Adsorption kinetics, isotherms and thermodynamics of Cr(III) on graphene oxide

Cited by 110 publications

References 33 publications

Enhanced Adsorption Removal of Pb(II) and Cr(III) by Using Nickel Ferrite-Reduced Graphene Oxide Nanocomposite

Enhanced Adsorption Removal of Pb(II) and Cr(III) by Using Nickel Ferrite-Reduced Graphene Oxide Nanocomposite

Adsorption of mercury(ii) with an Fe₃O₄ magnetic polypyrrole–graphene oxide nanocomposite

Characterization and evaluation of amorphous carbon thin film (ACTF) for sodium ion adsorption

Contact Info

Product

Resources

About

Adsorption kinetics, isotherms and thermodynamics of Cr(III) on graphene oxide

Cited by 110 publications

References 33 publications

Enhanced Adsorption Removal of Pb(II) and Cr(III) by Using Nickel Ferrite-Reduced Graphene Oxide Nanocomposite

Enhanced Adsorption Removal of Pb(II) and Cr(III) by Using Nickel Ferrite-Reduced Graphene Oxide Nanocomposite

Adsorption of mercury(ii) with an Fe3O4 magnetic polypyrrole–graphene oxide nanocomposite

Characterization and evaluation of amorphous carbon thin film (ACTF) for sodium ion adsorption

Contact Info

Product

Resources

About

Adsorption of mercury(ii) with an Fe₃O₄ magnetic polypyrrole–graphene oxide nanocomposite