Fabrication of MnFe2O4 nanoparticles embedded chitosan-diphenylureaformaldehyde resin for the removal of tetracycline from aqueous solution

In this study, a magnetic composite was synthesized using chitosan, diphenylurea and formaldehyde with magnetic nanoparticles, (MnFe2O4) via condensation polymerization. The newly synthesized magnetic nanocomposite (CDF@MF) was characterized using several analytical techniques including Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) and etc. To investigate the applicability of CDF@MF, it was employed as an adsorbent for rapidly removal of an antibiotic, namely, tetracycline (TC), from aqueous solution using several factors such as pH, the adsorbent dose, the initial concentration and the contact time. The adsorption kinetics results exhibited that the adsorption process followed a pseudo-first-order model. The maximum adsorption capacity for TC was calculated to be 168.24 mg/g based on the Langmuir adsorption isotherm model, with fitting correlation coefficient (R-2), 0.9955. The regeneration study advice that no major change in the adsorption capacity was noticed and show 157.97% adsorption performance after seven cycles. These results are standing to indicate that the prepared porous CDF@MF could be used as a low-cost, effective, reusable adsorbent for pharmaceutical wastewater treatment. (C) 2019 Elsevier B.V. All rights reserved.