Kong Dexu, Kusrini Eny, Wilson Lee D
Saskatchewan Research Council, 125-15 Innovation Boulevard, Saskatoon, SK S7N 2X8, Canada.
Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
Micromachines (Basel). 2021 Apr 22;12(5):478. doi: 10.3390/mi12050478.
Rare-earth elements such as lanthanum and yttrium have wide utility in high-tech applications such as permanent magnets and batteries. The use of biopolymers and their composites as adsorbents for La (III) and Y (III) ions were investigated as a means to increase the uptake capacity. Previous work has revealed that composite materials with covalent frameworks that contain biopolymers such as pectin and chitosan have secondary adsorption sites for enhanced adsorption. Herein, the maximum adsorption capacity of a 5:1 Pectin-Chitosan composite with La (III) and Y (III) was 22 mg/g and 23 mg/g, respectively. Pectin-Chitosan composites of variable composition were characterized by complementary methods: spectroscopy (FTIR, C solids NMR), TGA, and zeta potential. This work contributes to the design of covalent Pectin-Chitosan biopolymer frameworks for the controlled removal of La (III) and Y (III) from aqueous media.
镧和钇等稀土元素在永磁体和电池等高技术应用中具有广泛用途。研究了使用生物聚合物及其复合材料作为镧（III）和钇（III）离子的吸附剂，以提高吸附容量。先前的工作表明，含有果胶和壳聚糖等生物聚合物的具有共价框架的复合材料具有用于增强吸附的二级吸附位点。在此，5:1果胶 - 壳聚糖复合材料对镧（III）和钇（III）的最大吸附容量分别为22 mg/g和23 mg/g。通过互补方法对不同组成的果胶 - 壳聚糖复合材料进行了表征：光谱学（傅里叶变换红外光谱、固体碳核磁共振）、热重分析和zeta电位。这项工作有助于设计用于从水性介质中可控去除镧（III）和钇（III）的共价果胶 - 壳聚糖生物聚合物框架。
