Highly efficient adsorption of tetracycline using chitosan-based magnetic adsorbent

Herein, tetracycline adsorption employing magnetic chitosan (CS·Fe3O4) as the adsorbent is reported. The magnetic adsorbent was synthesized by the co-precipitation method and characterized through FTIR, XRD, SEM, and VSM analyses. The experimental data showed that the highest maximum adsorption capa...

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Autores:
Bruckmann, Franciele
Schnorr, Carlos Eduardo
da Rosa Salles, Theodoro
Batista Nunes, Franciane
Baumann, Luiza
Irineu Müller, Edson
Silva Oliveira, Luis Felipe
Dotto, Guilherme Luiz
Bohn Rhoden, Cristiano Rodrigo
Tipo de recurso:
Article of investigation
Fecha de publicación:
2022
Institución:
Corporación Universidad de la Costa
Repositorio:
REDICUC - Repositorio CUC
Idioma:
eng
OAI Identifier:
oai:repositorio.cuc.edu.co:11323/10936
Acceso en línea:
https://hdl.handle.net/11323/10936
https://repositorio.cuc.edu.co/
Palabra clave:
Antibiotics
Emerging pollutants
Iron oxide nanoparticles
Magnetic nanocomposites
Rights
openAccess
License
Atribución 4.0 Internacional (CC BY 4.0)
Description
Summary:Herein, tetracycline adsorption employing magnetic chitosan (CS·Fe3O4) as the adsorbent is reported. The magnetic adsorbent was synthesized by the co-precipitation method and characterized through FTIR, XRD, SEM, and VSM analyses. The experimental data showed that the highest maximum adsorption capacity was reached at pH 7.0 (211.21 mg g−1). The efficiency of the magnetic adsorbent in tetracycline removal was dependent on the pH, initial concentration of adsorbate, and the adsorbent dosage. Additionally, the ionic strength showed a significant effect on the process. The equilibrium and kinetics studies demonstrate that Sips and Elovich models showed the best adjustment for experimental data, suggesting that the adsorption occurs in a heterogeneous surface and predominantly by chemical mechanisms. The experimental results suggest that tetracycline adsorption is mainly governed by the hydrogen bonds and cation–π interactions due to its pH dependence as well as the enhancement in the removal efficiency with the magnetite incorporation on the chitosan surface, respectively. Thermodynamic parameters indicate a spontaneous and exothermic process. Finally, magnetic chitosan proves to be efficient in TC removal even after several adsorption/desorption cycles.