以氧化石墨烯(GO)、膨润土(Bent)为原料,十六烷基三甲基溴化铵(CTAB)为表面活性剂,利用超声混合法合成了氧化石墨烯/膨润土复合材料( GO/Bent).通过静态吸附试验,探讨了pH、投加量、吸附时间、初始浓度对GO/Bent 吸附U(Ⅵ)的影响.试验结果表明,当pH为6、GO/Bent投加量为0.2 g/L、U(Ⅵ)的初始浓度为10 mg/L时、吸附效果达到最好;吸附过程符合Langmuir等温模型和准二级动力学方程. XRD、SEM、EDS分析表明,GO/Bent合成成功,活性位点丰富,离子交换参与了吸附反应.%The graphene/bentonite composites ( GO/Bent) was synthesized by ultrasonic blending with gra-phene oxide (GO), bentonite (Bent) and cetyltrimethyl ammonium bromide (CTAB) as surfactants.The effects of pH, GO/Bent dosage, adsorption time and initial concentration on GO/Bent adsorption U(Ⅵ) were investigated by static adsorption test.The results suggested that the best adsorption result occurred when the dosage of GO/Bent was 0.2 g/L, the pH was 6, the initial concentration of U(Ⅵ) was 10 mg/L.The adsorption process could be de-scribed by Langmuir isothermal model and the pseudo-second-order kinetic equation.XRD,SEM,EDS analysis in-dicated that GO/Bent was successfully synthesized.The active sites rich,and ion exchange involved in the adsorp-tion reaction.
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