羟丙基-β-环糊精(HP-β-CD)与羧基化多壁碳纳米管(COOH-MWNTs)经过聚合反应,形成β-环糊精-碳纳米管(β-CD-MWNTs)交聚复合材料.探究了在不同pH、反应时间、铀的初始浓度和吸附剂投加量条件下对铀的吸附能力.结果表明,pH为5、铀浓度为10 mg/L、β-CD-MWNTs吸附60 min后基本处于平衡状态,吸附容量高达18.36 mg/g.准二级动力学模型(R2>0.999)和Langmuir等温模型(R2>0.996)均可拟合其对铀的吸附过程,饱和吸附容量为83.33 mg/g.采用TEM、SEM、EDS和FTIR分析表明,HP-β-CD已被接枝到MWNTs上,而在对铀的吸附过程中,—C—O、—C—O和—OH等基团发挥着重要的作用.%MWNTs are reacted with HP-β-CD to obtain β-CD-MWNTs with great dispersivity. The effects of pH,initial concentration of uranium,contact time and adsorbent dosage on the adsorption behavior were investiga-ted. The results show that pH=5,the initial concentration of uranium was 10 mg/L,the adsorption of uranium on β-CD-MWNTs after 90 min,and the adsorption capacity is 18.36 mg/g at 25℃.Kinetics and isothermal were bet-ter fitted by Langmuir isotherm model and pseudo-second-order kinetic model,and the maximum adsorption capacity was 83.33 mg/g. The composites had been antegrallty made,the—C—O,—C—O and—OH played irreplaceable role by TEM,SEM,EDS and FTIR.
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