▎ 摘　　要

In this study, a facile strategy was reported for the first time to prepare 2-vinylpyridine/thermosensitive polymer functionalized graphene oxide to be applied as the nanoadsorbent for efficient removal of phenol and 2, 4-dichlorophenol compounds in the wastewater samples by ultra-performance liquid chromatography. Fourier -transform infrared spectroscopy, thermogravimetric analysis, carbon, hydrogen, and nitrogen elemental anal-ysis, scanning electron microscope, and N2 adsorption-desorption isotherms characterized the functional groups and structures. Experimental factors including pH, contact time, temperature, amount of adsorbent dosage, and the initial concentration of phenol and 2, 4-dichlorophenol compounds were studied to optimize the removal procedure. The optimal conditions for phenol removal were recorded at pH=7, contact time of 10 min, the adsorbent dosage of 0.005 g, and temperature of 298 K. For 2, 4-dichlorophenol, the experimental conditions for the removal process were pH=8, the adsorbent dosage of 0.005 g, and contact time of 5 min at 298 K. The experimental results correlated well with the pseudo-second-order kinetics and suggested that the removal of phenol and 2, 4-dichlorophenol from an aqueous solution follows Langmuir isotherm model. The maximum Langmuir sorption capacity obtained was 333.33 and 103.092 mg g-1 at 298 K for phenol and 2, 4- dichlor-ophenol, respectively. Thermodynamic analysis indicated that the process was feasible and spontaneous (phenol: Delta G =-8.199 to-8.733 kJ mol-1 and 2, 4-dichlorophenol: Delta G =-14.796 to-15.069 kJ mol-1) and exothermic in nature (phenol: Delta H =-1821.51 J mol-1 and 2, 4-dichlorophenol: Delta H=-18325.7 J mol-1). The maximum removal efficiency of phenol and 2, 4-dichlorophenol compounds were 99% and 89%, respectively. Thus, the prepared nanoadsorbent can be used as an ideal adsorbent for the recycling removal of phenolic contaminants from wastewater samples.