▎ 摘　　要

Present study evaluates the removal of antibiotics from contaminated water using a novel thermosensitive graphene oxide. The modified graphene oxide with Poly N-vinyl caprolactam has been characterized by different methods such as X-ray diffraction analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, and Brunauer-Emmett-Teller (BET) surface area. The thermogravimetric analysis showed the melting and degradation of polymeric chains of poly N-vinyl caprolactam, which confirms the presence of surface-bonded polymer. In order to study the relationship between adsorption properties of amoxicillin (AMX) and ciprofloxacin (CIP) and effective parameters, several independent factors (pH, concentrations, temperature, and time) have been optimized. The results show that complete removal of 20 mg/L of AMX and CIP in a solution volume of 100 mL is reached within 30 min using 50 mg of the adsorbent at acidic pH values. The behavior of AMX and CIP adsorption onto the graphene oxide well fitted the pseudo-second-order kinetic model and Langmuir isotherm. The negative value of Delta H degrees and Delta G degrees (-61.76, -97.44 kJ/mol) showed that the adsorption was exothermic and spontaneous. Therefore, it can be concluded that thermosensitive graphene oxide could be a reliable adsorbent for the removal of antibiotics from contaminated water.