石墨烯磷酸钍（IV）复合阳离子交换剂的合成及离子交换性能：其在铅金属离子选择性分离中的应用
Synthesis and Ion-Exchange Properties of Graphene Th(IV) Phosphate Composite Cation Exchanger: Its Applications in the Selective Separation of Lead Metal Ions.
作者信息
Rangreez Tauseef Ahmad, Asiri Abdullah M, Alhogbi Basma G, Naushad Mu
机构信息
Advanced Functional Materials Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India.
Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
出版信息
Int J Environ Res Public Health. 2017 Jul 24;14(7):828. doi: 10.3390/ijerph14070828.
In this study, graphene Th(IV) phosphate was prepared by sol-gel precipitation method. The ion-exchange behavior of this cation-exchanger was studied by investigating properties like ion-exchange capacity for various metal ions, the effect of eluent concentration, elution behavior, and thermal effect on ion-exchange capacity (IEC). Several physicochemical properties as Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) study, thermal studies, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies were also carried out. The material possessed an IEC of 1.56 meq·dry·g of the exchanger and was found to be nano-composite. The selectivity studies showed that the material is selective towards Pb(II) ions. The selectivity of this cation-exchanger was demonstrated in the binary separation of Pb(II) ions from mixture with other metal ions. The recovery was found to be both quantitative and reproducible.
在本研究中，采用溶胶 - 凝胶沉淀法制备了石墨烯磷酸钍（IV）。通过研究该阳离子交换剂对各种金属离子的离子交换容量、洗脱液浓度的影响、洗脱行为以及热效应等性质，对其离子交换行为进行了研究。还进行了多项物理化学性质研究，如傅里叶变换红外（FTIR）光谱、X射线衍射（XRD）研究、热学研究、扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究。该材料的离子交换容量为1.56 meq·干·克交换剂，并且被发现是纳米复合材料。选择性研究表明，该材料对Pb（II）离子具有选择性。这种阳离子交换剂的选择性在从与其他金属离子的混合物中二元分离Pb（II）离子中得到了证明。回收率被发现是定量且可重复的。
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