▎ 摘　　要

Graphene oxide (GO) was covalently functionalized withethylenediamine(ED-GO) and characterized by Fourier transform infrared spectroscopy,X-ray diffraction, Raman spectroscopy, and field emission scanningelectron microscopy techniques. Afterward, ED-GO-embedded chitosan/polyvinylalcohol membrane adsorbents (CP/ED-GO) were fabricated by incorporatingdifferent amounts (0-1 wt %) of ED-GO, and the resultant membraneadsorbents were applied for the adsorption of reactive blue 19 dye(RB19) from water. According to the batch adsorption results, theadsorbent containing 0.25 wt % ED-GO possessed the best performancein RB19 removal. Adsorption of RB19 dye onto the CP/ED-GO-0.25 wt% membrane was also optimized using the response surface methodology.The solution pH, initial dye concentration, and adsorbent mass wereselected as independent variables. The dye removal of 95% was achievedunder the optimized conditions, close to the experimentally measuredvalue, indicating the reliability of the optimization. Isothermaladsorption experiments revealed that RB19 dye adsorption onto CP,CP/ED-GO-0.25 wt %, and CP/GO-0.25 wt % could be well described bythe Freundlich isotherm model. The adsorption kinetic of RB19 dyeusing CP, CP/ED-GO-0.25 wt %, and CP/GO-0.25 wt % membrane adsorbentsfollowed the pseudo-second-order kinetic pattern. The adsorption capacityvalues of 333.33(1), 303.03, and 256.41 mg g(-1) were obtained for CP/ED-GO-0.25 wt %, CP, and CP/GO membrane adsorbents,respectively. In summary, the CP/ED-GO-0.25 wt % membrane was foundto be a promising adsorbent for wastewater decoloring.