TY - JOUR
T1 - Levofloxacin Adsorption onto MWCNTs/CoFe2O4 Nanocomposites
T2 - Mechanism, and Modeling Using Non-Linear Kinetics and Isotherm Equations
AU - Al-Musawi, Tariq J.
AU - Almajidi, Yasir Qasim
AU - Al-Essa, Ethar M.
AU - Romero-Parra, Rosario Mireya
AU - Alwaily, Enas R.
AU - Mengelizadeh, Nezamaddin
AU - Ganji, Fatemeh
AU - Balarak, Davoud
N1 - Funding Information:
The authors are grateful to the Zahedan University of Medical Sciences (Iran) for the financial support. Furthermore, we would like to thank Al-Mustaqbal University College (Iraq) for the given the scientific support to carry out this study.
Publisher Copyright:
© 2022 by the authors.
PY - 2023/1
Y1 - 2023/1
N2 - In the present work, the adsorption mechanism and capacity of MWCNTs/CoFe2O4 nanocomposite as an adsorbent were investigated. Levofloxacin (LFX), a widely used antibiotic, was selected as a hazardous model contaminant in aqueous solutions. The surface and inner characterization of MWCNTs/CoFe2O4 was obtained via SEM/TEM, XRD, BET/BJH, and pHPZC. These analyses indicated that MWCNTs/CoFe2O4 possess excellent surface and pore characteristics, e.g., specific surface area, pore volume, and mean pore diameter, which were 72 m2/g, 0.51 cm3/g, and 65 nm, respectively. The results demonstrate that by supplementing 1 g/L of MWCNTs/CoFe2O4 at experimental conditions of pH value of 5, temperature of 30 °C, initial LFX concentration of 50 mg/L and mixing time of 90 min, a significant outcome of 99.3% removal was achieved. To identify the phenomenon of adsorption, the thermodynamic parameters of ΔH° and ΔS° were calculated, which indicated that the nature of LFX adsorption onto MWCNTs/CoFe2O4 nanocomposite was endothermic and spontaneous. Nine isotherm models, including four two-parameter and five three-parameter models, were investigated. In addition, the regression coefficient as well as five error coefficient models were calculated for nonlinear isotherm models. According to the goodness of fit tests, the equilibrium data were well coordinated with the Freundlich and Sips isotherms. The kinetics study showed that the LFX adsorption data well fitted with pseudo-second-order model, and the adsorption of LFX molecules occurred through several stages from surface to intraparticle diffusion. In conclusion, the present work evinces that LFX wastewater can be efficiently treated via an adsorption process using a MWCNTs/CoFe2O4 nanocomposite.
AB - In the present work, the adsorption mechanism and capacity of MWCNTs/CoFe2O4 nanocomposite as an adsorbent were investigated. Levofloxacin (LFX), a widely used antibiotic, was selected as a hazardous model contaminant in aqueous solutions. The surface and inner characterization of MWCNTs/CoFe2O4 was obtained via SEM/TEM, XRD, BET/BJH, and pHPZC. These analyses indicated that MWCNTs/CoFe2O4 possess excellent surface and pore characteristics, e.g., specific surface area, pore volume, and mean pore diameter, which were 72 m2/g, 0.51 cm3/g, and 65 nm, respectively. The results demonstrate that by supplementing 1 g/L of MWCNTs/CoFe2O4 at experimental conditions of pH value of 5, temperature of 30 °C, initial LFX concentration of 50 mg/L and mixing time of 90 min, a significant outcome of 99.3% removal was achieved. To identify the phenomenon of adsorption, the thermodynamic parameters of ΔH° and ΔS° were calculated, which indicated that the nature of LFX adsorption onto MWCNTs/CoFe2O4 nanocomposite was endothermic and spontaneous. Nine isotherm models, including four two-parameter and five three-parameter models, were investigated. In addition, the regression coefficient as well as five error coefficient models were calculated for nonlinear isotherm models. According to the goodness of fit tests, the equilibrium data were well coordinated with the Freundlich and Sips isotherms. The kinetics study showed that the LFX adsorption data well fitted with pseudo-second-order model, and the adsorption of LFX molecules occurred through several stages from surface to intraparticle diffusion. In conclusion, the present work evinces that LFX wastewater can be efficiently treated via an adsorption process using a MWCNTs/CoFe2O4 nanocomposite.
KW - MWCNTs/CoFeO
KW - adsorption
KW - levofloxacin
KW - nanocomposite
KW - regeneration
UR - http://www.scopus.com/inward/record.url?scp=85146790847&partnerID=8YFLogxK
U2 - 10.3390/magnetochemistry9010009
DO - 10.3390/magnetochemistry9010009
M3 - Original Article
AN - SCOPUS:85146790847
SN - 2312-7481
VL - 9
JO - Magnetochemistry
JF - Magnetochemistry
IS - 1
M1 - 9
ER -