ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Efficient removal of ampicillin from aqueous media using silver nanoparticles decorated with magnetic-chitosan: optimization by central composite design

Zahra Mahmodi sheikh sarmast, Sajjad Sedaghat, Pirouz Derakhshi, and Parviz Aberoomand Azar

Department of Chemistry, Islamic Azad University Science and Research Branch, Tehran, Iran

E-mail: sajjadsedaghat@yahoo.com

Received: 11 April 2023  Accepted: 4 September 2023

Abstract:

In this study, silver nanoparticles were incorporated with chitosan and Fe₃O₄ NPs for the removal of ampicillin from aqueous media. In order to study the characterization of the synthesized composite, scanning electron microscopy, energy-dispersive X-ray, Fourier transform infrared spectroscopy, X-ray diffraction spectroscopy, and vibrating sample magnetometer were used. The effects of experimental factors on AMP removal were assessed using a central composite design. The optimum values were found to be 4, 0.4 g L⁻¹, 40 min, and 40 mg L⁻¹ for pH, adsorbent dosage, contact time, and AMP concentration, respectively. Under the optimum conditions, the maximum removal efficiency was obtained at 88.32% (experimental value) and 87.92% (predicted value). The Langmuir isotherm model with a coefficient of determination (R²) of 0.9995 and the pseudo-second-order kinetic model with R² equal to 0.9992 stated the adsorption process more appropriately. The maximum adsorption capacity (q_max) was 49.50 mg g⁻¹. This work represented that fabricated adsorbent can be promising, efficient, and simple adsorbent for the removal of antibiotics such as ampicillin from aqueous environments.

Keywords: Silver nanoparticles; Chitosan; Magnetic adsorbent; Ampicillin; Central composite design

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-03061-2

Chemical Papers 78 (1) 189–205 (2024)