Nowadays, pollution of water with antibiotics as emerging contaminants is one of the important concerns. One of the most common antibiotics in veterinary is tetracycline (TC). Most of the TCs were excreted to environment without metabolism and assimilation. Therefore, elimination of TCs from environment is extremely urgent. Fe3O4 magnetic nanoparticles (MNPs) have attracted attention in the field of pollutant adsorption and environmental remediation owing to the large surface area, high adsorption ability, sufficient stability and easy preparation. The aim of this study is to investigate tetracycline antibiotics removal from aqueous solution using Fe3O4 MNPs. To do so,Fe3O4 MNPs were synthesized by applying a very simple solvothermal method. The adsorption behavior of TC on Fe3O4 MNPs fitted the pseudo-second-order kinetics model. Results confirm that the optimum pH for TC removal is 3. Finally, Langmuir isotherm model was selected as the best isotherm for TC removal from water using Fe3O4 MNP.

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