Abstract：The graphene oxide (GO) was prepared by Hummers method.The chitosan was modified by ferroferric oxide and ferric chloride to prepare the magnetic chitosan (MCS).Then the magnetic chitosan/graphene oxide (MCS/GO) adsorbent were prepared by chemical crosslinking method. The structure and morphology of (MCS/GO) were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Meanwhile,the effect of experimental condition on Co(Ⅱ) adsorption in water by MCS/GO were discussed.The results showed that the adsorption rate of Co(Ⅱ) reached 99.4% under the following experimental conditions:the pH of wastewater was 6.0;the content of Co(Ⅱ) in wastewater was 100 mg/L; the adsorption was conducted at room temperature with 1.0 g/L MCS/GO for 120 min.The adsorption behavior of Co(Ⅱ) by MCS/GO conformed to the characteristics of pseudo-first order model and Langmuir isotherm model,and the saturated adsorption capacity was 117.19 mg/g.After using for six adsorption-desorption cycles,the adsorption rate of MCS/GO to Co(Ⅱ) only decreased by 3.5%,indicating the excellent performance of regeneration.Therefore,the developed MCS/GO was suited for the pollution treatment of Co(Ⅱ) in water.
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