Biosynthesis and characterization of silver nanoparticles for the removal of amoxicillin from aqueous solutions using Oenothera biennis water extract


Oenothera biennis water extract was used to perform green nano-biosynthesis of silver nanoparticles (AgNPs) for the removal of amoxicillin (AMX) from water. Scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, and energy-dispersive analysis of X-rays were used to approve the synthesis of AgNPs. The average size of AgNPs was determined as 8.10 nm. Antibacterial activities of Staphylococcus aureus and Escherichia coli were also assessed, and the maximum inhibition zones for them were obtained as 19 and 16 mm, respectively. Experimental factors, including contact time, pH, AgNPs dosage, and initial concentration of AMX were investigated. AMX removal efficiency of 97.27% was achieved under the contact time of 30 min, pH 4, adsorbent dosage of 0.5 g, and drug concentration of 30 mg L−1. Evaluation of the isotherm models showed that the adsorption process followed the Langmuir model (R2 = 0.9944) with qmax = 101.01 mg g−1. Moreover, the kinetic studies indicated that the adsorption procedure fitted the pseudo-second-order model with R2 = 0.9997.

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Lotfollahzadeh, R., Yari, M., Sedaghat, S. et al. Biosynthesis and characterization of silver nanoparticles for the removal of amoxicillin from aqueous solutions using Oenothera biennis water extract. J Nanostruct Chem (2021).

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  • Biosynthesis
  • Oenothera biennis
  • Amoxicillin
  • Silver nanoparticles
  • Antibacterial activity