Publication: Total removal of amoxicillin from water using magnetic core nanoparticles functionalized with silver
Authors
Vicente Martínez, Yésica ; Angulo Gonzalez, Eloy ; Soto Meca, Antonio ; Caravaca, Manuel
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Publisher
Elsevier
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DOI
https://doi.org/10.1016/j.envres.2022.113091
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info:eu-repo/semantics/article
Description
© 2022 Elsevier Inc.
This document is the published version of a published work that appeared in final form in Environmental Research
To access the final edited and published work see:
https://doi.org/10.1016/j.envres.2022.113091
Abstract
Framed in the problem of emerging pollutants, in this work we introduce a novel procedure for the total removal of amoxicillin from water samples using magnetic nanoparticles functionalized with nanometric silver (Fe3O4@AgNPs). Experimental conditions such as pH, contact time, temperature, as well as adsorbate and adsorbent doses have been studied to achieve the total adsorption for different concentrations of amoxicillin in water. Particularly, for concentrations 10 and 100 mg L−1, a maximum removal efficiency of 100% was reached at room temperature and pH = 7 after 15 min of contact time between adsorbent and water samples under gentle shaking. The doses of adsorbent employed to remove 10 and 100 mg L−1 of amoxicillin were 100 and 500 μL, respectively. Characterization of the adsorbent surfaces was performed by Scanning and Transmission Electron Microscopy, Energy Dispersive X-ray Spectroscopy, BET analysis and Fourier-transform infrared spectroscopy. Recycling studies were carried out employing 500 μL of NaOH solution 1 M during 15 min in order to explore desorption and reuse of the adsorbent, showing that Fe3O4@AgNPs remains unaltered and can be used for two more additionally adsorption cycles, exhibiting 93% adsorption efficiency after the third regeneration. The characterization of equilibrium isotherms and thermodynamics reveal a Langmuir-type endothermic chemisorption.
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Citation
Environmental Research Vol. 211, August 2022, 113091
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