Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2018 Dec 28;12(1):96.
doi: 10.3390/ma12010096.

Adsorption Analyses of Phenol from Aqueous Solutions Using Magadiite Modified with Organo-Functional Groups: Kinetic and Equilibrium Studies

Mingliang Ge  1 , Xubin Wang  2 , Mingyi Du  3 , Guodong Liang  4 , Guoqing Hu  5 , Jahangir Alam S M  6   7   8
Affiliations

Adsorption Analyses of Phenol from Aqueous Solutions Using Magadiite Modified with Organo-Functional Groups: Kinetic and Equilibrium Studies

Mingliang Ge et al. Materials (Basel). .

Abstract

Organically-modified magadiite (MAG⁻CTAB⁻KH550) was synthesized via ion-exchange method and condensation reaction in the presence of pure magadiite (MAG), cetyltrimethylammonium bromide (CTAB) and γ-aminopropyltriethoxysilane (KH550) in aqueous solution in this research. This new adsorbent material was studied using scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), and N₂ adsorption/desorption isotherms process. It was found that the MAG⁻CTAB⁻KH550 has high Brunaur-Emmet-Teller (BET) specific surface area and mesoporous pore size distribution which enhanced its ability to remove phenol in aqueous solution; and, the value of pH has a relatively large impact on the adsorption behavior of the sorbent. Finally, the adsorptive behavior of the mesoporous material on phenol was followed pseudo-second-order kinetic adsorption model. In contrast, the adsorption equilibrium isotherm was better performed Langmuir isotherm model than the Freundlich isotherm model; in addition, the results also showed that the MAG⁻CTAB⁻KH550 had a better adsorption capacity and removal efficiency than MAG.

Keywords: adsorption; adsorption isotherms; adsorption kinetics; magadiite; phenol.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Procedure of MAG–CTAB–KH550 preparation.
Figure 2
Figure 2
SEM images of (a) MAG; (b) MAG–CTAB and (c) MAG–CTAB–KH550.
Figure 3
Figure 3
(a) XRD patterns of MAG, MAG–CTAB, and MAG–CTAB–KH550; (b) Infrared spectrum of MAG, MAG–CTAB, and MAG–CTAB–KH550.
Figure 4
Figure 4
N2 adsorption/desorption (a) curve and pore size distribution and (b) of MAG and MAG–CTAB–KH550 (at 10 s of equilibration interval, and −196 °C of analysis bath temperature).
Figure 5
Figure 5
(a) Effects of adsorbent dosage of MAG and MAG–CTAB–KH550 on removal efficiency and adsorption capacity of phenol (in the conditions of pH = 10, and the adsorption time for 60 min); (b) Effects of initial concentration of phenol on the removal efficiency and adsorption capacity under the conditions of sorbents dosage of 1 g/L and adsorption equilibrium time for 60 min, and pH value of 10; (c) Effects of adsorption time on adsorption capacity of phenol under the conditions of initial concentration of phenol at 50 mg/L, pH of 10, and the sorbents dosage of 1 g/L; and (d) Effects of pH values of the solution on adsorption capacity of phenol under the conditions of initial concentration of phenol at 50 mg/L, sorbents dosage of 1 g/L, and adsorption equilibrium time of 60 min.
Figure 6
Figure 6
Kinetic curves of the sorption of phenol for pristine MAG and MAG–CTAB–KH550 in the conditions of initial phenol concentration at 50 mg/L, the pH value at 10, and sorbents dosage at 1 g/L for: (a) Pseudo-first-order kinetic model; (b) Pseudo-second-order kinetic model.
Figure 7
Figure 7
Equilibrium isotherms of adsorption of MAG, and MAG–CTAB–KH550 for phenol.
Figure 8
Figure 8
Adsorption isotherm models (a) Langmuir model and (b) Freundlich model.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Ji X., Ding J., Xie X., Cheng Y., Huang Y., Qin L., Han C. Pollution status and human exposure of decabromodiphenyl ether (BDE-209) in China. ACS Omega. 2017;2:3333–3348. doi: 10.1021/acsomega.7b00559. - DOI - PMC - PubMed
    1. Dabrowski A., Podkoscielny P., Hubicki Z., Barczak M. Adsorption of phenolic compounds by activated carbon—A critical review. Chemosphere. 2005;58:1049–1070. doi: 10.1016/j.chemosphere.2004.09.067. - DOI - PubMed
    1. De Moraes M.F., de Oliveira T.F., Cuellar J., Castiglioni G.L. Phenol degradation using adsorption methods, advanced oxidative process (H2O2/UV) and H2O2/UV/activated carbon coupling: influence of homogeneous and heterogeneous phase. Desalin. Water Treat. 2017;100:38–45. doi: 10.5004/dwt.2017.21808. - DOI
    1. Khardenacis A.A., Kapley A., Purohit H.J. Phenol-mediated improved performance of active biomass for treatment of distillery wastewater. Int. Biodeter. Biodegr. 2008;62:38–45. doi: 10.1016/j.ibiod.2007.06.016. - DOI
    1. Wei X., Wu H., Sun F. Magnetite/Fe–Al–montmorillomite as a fenton catalyst with efficient degradation of phenol. J. Colloid Interf. Sci. 2017;504:611–619. doi: 10.1016/j.jcis.2017.05.110. - DOI - PubMed