氧化石墨烯/膨润土吸附U（VI）的性能

摘要：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值为6，GO/Bent投加量为0.2g/L,U（VI）的初始浓度为10mg/L,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。

Adsorption of U (VI) by graphene oxide/bentonite Composites

Abstract: The Graphene/bentonite composites (GO/Bent) was synthesized by ultrasonic blending with graphene 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 value was 6, the initial concentration of U (VI) was 10 mg/L. The adsorption process could be described by Langmuir isothermal model and the pseudo-second-order kinetic equation. XRD,SEM,EDS analysis indicated that GO/Bent was successfully synthesized. The active sites rich,and ion exchange involved in the adsorption reaction.