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针对污染水体中的放射性核素去除问题,采用Hummers法制备了氧化石墨烯,利用红外光谱、拉曼光谱、透射电镜和Zeta电位对氧化石墨烯的结构和表面形貌进行了表征。采用静态批式法研究Th(Ⅳ)在氧化石墨烯上的吸附行为,探讨了pH值、离子强度、腐殖酸等因素对吸附的影响。实验结果表明,pH值对吸附的影响很大,离子强度对吸附几乎没有影响;在pH<5时,腐殖酸浓度对吸附起到了促进作用,浓度越大对吸附的影响越强烈。研究结果表明氧化石墨烯可以作为放射性核素处理的一种潜在吸附材料。
For the removal of radionuclides in polluted water, the graphene oxide was prepared by Hummers method. The structure and surface morphology of graphene oxide were characterized by FTIR, Raman spectroscopy, transmission electron microscopy and Zeta potential. The static batch method was used to study the adsorption behavior of Th (Ⅳ) on graphene oxide. The effects of pH, ionic strength and humic acid on the adsorption were also discussed. The experimental results showed that the pH value had a great influence on the adsorption and the ionic strength had almost no effect on the adsorption. At pH <5, the concentration of humic acid promoted the adsorption, and the stronger the adsorption was, the stronger the adsorption was. The results show that graphene oxide can be used as a potential adsorbent for radionuclide treatment.