摘要
采用共沉淀法和冻融法制备了聚乙烯醇/壳聚糖/还原氧化石墨烯复合水凝胶包覆的亚铁氰化铜镍钾复合物(PCR/KCuNiFC),用于水溶液中铷(Rb)的分离。采用扫描电镜(SEM)、X射线衍射仪(XRD)和傅里叶变换红外光谱仪(FT-IR)表征了材料的形貌和组成。不同条件下Rb+在PCR/KCuNiFC上吸附的研究结果表明:PCR/KCuNiFC对Rb+的吸附过程符合准二阶动力学和Langmuir模型,且吸附过程是自发吸热的。电化学辅助脱附法可以有效地解吸PCR/KCuNiFC上吸附的Rb+。PCR/KCuNiFC在模拟卤水中对Rb+的吸附率可达到82.1%。
A polyvinyl alcohol/chitosan/reduced graphene oxide hybrid hydrogel coated potassium copper-nickel hexacyanoferrate composite(PCR/KCuNiFC)was prepared by coprecipitation and freeze-thaw method for the separation of rubidium(Rb)from aqueous solution.The morphology and composition of the composite were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),and Fourier-transform infrared spectroscopy(FT-IR).The adsorption behavior of Rb+on PCR/KCuNiFC under different conditions was studied.The results showed that the adsorption of Rb+by PCR/KCuNiFC conforms to pseudo-second-order kinetics and Langmuir model,and is spontaneous and endothermic.The desorption of Rb+from PCR/KCuNiFC could be promoted electrochemically.The adsorption efficiency of Rb+by PCR/KCuNiFC in simulated brine reached 82.1%.
作者
徐政
倪加惠
褚维凡
XU Zheng;NI Jiahui;CHU Weifan(School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《电镀与涂饰》
CAS
北大核心
2022年第15期1116-1122,共7页
Electroplating & Finishing
基金
科技部“科技助力经济2020”重点专项(SQ2020YFF0412719)。
关键词
复合水凝胶
吸附剂
铷
电化学辅助脱附法
模拟卤水
composite hydrogel
adsorbent
rubidium
electrochemically assisted desorption
simulated brine
