贝壳基吸附材料的制备及其铀吸附性能研究

Preparation of shell based adsorbent materials and its adsorption properties of uranium

废弃贝壳采用不同的改性方法,制备了具有良好铀吸附性能的贝壳基吸附剂CMS、HAS和OS,使用红外光谱(FTIR)、扫描电镜(SEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)和比表面分析(BET)对吸附剂的结构和组成进行表征。铀吸附实验结果表明,初始铀浓度为10 mg/L时,吸附剂用量为0.067 g/L,溶液pH为4,吸附时间为60 min,CMS对铀的吸附效率远高于HAS和OS,可达97.2%。

Based on the waste shells,shell based adsorbents(CMS,HAS and OS)with good uranium adsorption performance were prepared by different modification methods.The structure and composition of these adsorbent were characterized by infrared spectroscopy(FTIR),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD)and specific surface analysis(BET).The results show that the adsorption efficiency of CMS can reach 97.2%when the dosage of adsorbent is 0.067 g/L,the pH of solution is 4,the adsorption time is 60 min,and the initial uranium concentration is 10 mg/L.