关键词: 壳聚糖, 氧化石墨烯, GO/CS, 复合材料, 重金属 Cr（VI）, 吸附剂

Abstract: Heavy metal hexavalent chromium ion has serious pollution to the environment. Therefore，developing a highly effective adsorbent is necessary. In this paper，the method of phase change was used to produce chitosan/graphexe oxide（GO/CS）composite microspheres. The structure and surface morphology of microspheres were characterized by X-ray diffraction （XRD），Fourier transform infrared spectrometer （FT-IR），and scanning electron microscope（SEM）. The effects of the composite microsphere′s temperature ，the amount of adsorbent，the initial concentration of the solution，the adsorption temperature， the adsorption time，the pH of the adsorption solution，and the particle size of the composite microsphere on the adsorption performance of Cr（VI）were investigated. The results showed that the drop ball under the temperature of 30 ℃，the adsorbent amount of 0. 3 g，the initial concentration of the Cr（VI）solution of 40 mg/L，the adsorption temperature of 40 ℃，the adsorption time of 120 min，pH = 4，chitosan/graphene oxide composite ball of Cr（VI） adsorption performance to achieve the highest and largest adsorption rate was 84. 98%.

Key words: chitosan, graphite oxide, GO/CS, composites, heavy metal Cr（VI）, adsorbents