Outstanding Enrofloxacin Removal Using an Unmodified Low-Cost Sorbent Prepared from the Leaves of Pyracantha koidzumii
Por:
Martinez-Escutia, Ruben, Mendez-Albores, Abraham, Vazquez-Duran, Alma
Publicada:
1 nov 2022
Resumen:
Increasing discharges of synthetic antimicrobial agents from industrial
and municipal sewage, as well as from agricultural runoffs into water
bodies, is still a global challenge. Here, an unmodified low-cost
sorbent was prepared in an ecofriendly manner from Pyracantha koidzumii
leaves for the removal of enrofloxacin (ENR). Sorbent characterization
was accomplished using Fourier transform infrared spectroscopy (FTIR),
scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy
(EDS), BET surface area, zeta potential, and point of zero charge.
Biosorption assays were carried out via batch mode concerning the impact
of adsorbent dosage, contact time, solution pH, solution ionic strength,
adsorbate concentration, and temperature. In general, ENR adsorption was
significantly correlated with pH and ionic strength. At a neutral pH,
the sorbent had a theoretical maximal ENR uptake of 138.89 mg/g.
However, the adsorption capacity was significantly affected by the
presence of high concentrations of divalent cations (Ca2+ and Mg2+). The
findings from the kinetics and isotherms showed that the
pseudo-second-order kinetic and Langmuir isotherm models best fit the
experimental data. Electrostatic interactions, hydrogen bonding, and
pi-pi stacking were the most important mechanisms of adsorption of ENR
onto the P. koidzumii sorbent. Overall, this study suggests the
promising application of this agricultural residue for the efficient
removal of ENR from water.
Filiaciones:
Martinez-Escutia, Ruben:
Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Unidad Invest Multidisciplinaria L14 A1 Ciencia &, Cuautitlan 54714, Mexico
Mendez-Albores, Abraham:
Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Unidad Invest Multidisciplinaria L14 A1 Ciencia &, Cuautitlan 54714, Mexico
Vazquez-Duran, Alma:
Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Unidad Invest Multidisciplinaria L14 A1 Ciencia &, Cuautitlan 54714, Mexico
gold, Green Published, Gold, Green
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