氧化石墨烯-壳聚糖复合吸附剂的制备及其吸附性能  

Preparation and Adsorption Properties of Composite Adsorbent Graphene Oxide-Chitosan

作　　者：杨爱丽[1] Yang Aili(China Academy of Engineering Physics, Jiangyou 621907, China)

机构地区：[1]中国工程物理研究院,四川江油621907

出　　处：《稀有金属材料与工程》2018年第5期1583-1588,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(21407132)

摘　　要：采用Hummers法合成的氧化石墨烯(GO)与壳聚糖(CTS)制备复合型吸附剂GO-CTS,通过傅立叶红外光谱仪(FTIR)和扫描电镜(SEM)对结构和形貌进行表征。考察pH、投加量、吸附时间以及铀初始浓度等参数对吸附剂去铀效果的影响。结果表明,对于10mg/L的含铀溶液,GO和GO-CTS的最佳吸附条件分别为:pH=4~7,5;投加量1.0,1.0g/L;吸附时间为<1,70min;最大去铀率分别为99.5%,97.5%。GO和GO-CTS的吸附平衡符合Freundlich等温线模型,表明为多分子层吸附,主要以物理吸附为主,最大吸附量分别为78.13和114.94mg/g。The composite adsorbent graphene oxide-chitosan （GO-CTS） was prepared by Hummers method and characterized by FTIR and SEM. The products were used to study the adsorption of uranium from aqueous solution. The adsorption properties were estimated from the solution pH, adsorbent dosage, contact time and initial uranium concentration. The results show that for the uranium solution with an initial concentration of 10 mg/L, the optimum adsorption conditions of GO and GO-CTS are： pH 4-7 and 5, dosage 1.0 g/L and 1.0 g/L, adsorption balance time 〈1 min and 70 rain, and the maximum uranium removal rate 99.5% and 97.5%, respectively. The equilibrium adsorption data of GO and GO-CTS corresponds to the Freundlich isotherms model, which indicates that the adsorption process is a multi-molecular physical adsorption. The maximum adsorption capacities of GO and GO-CTS are 78.13 mg/g and 114.94 mg/g, respectively.

关 键 词：氧化石墨烯 壳聚糖 复合吸附剂 吸附 铀 

分 类 号：TB332[一般工业技术—材料科学与工程]