There is a growing interest in the development of new methods for extraction of REEs from nuclear wastes. In this study, we fabricated a novel material composed of 1,10-phenanthroline-2,9-dicarboxilic acid (PDA) functionalized magnetic graphene oxide (Fe3O4/GO) for extraction of Sm(III) from aqueous solutions. Our interest in selection of carboxyl-containing ligand was due to its good coordination characteristic with Sm (III) which can be used to design a new sorbent. Under the optimized extraction conditions, the calibration graph for Sm (III) was linear in a concentration range of 6.2-784.5 µg L-1 with a correlation coefficient of 0.9900. A detection limit of 1.4 μg L−1 with an enrichment factor of 125 was obtained. Precisions, expressed as relative standard deviation for single-sorbent repeatability and sorbent-to-sorbent reproducibility, were 5.9% and 8.7% (n =5), respectively. Finally, spiked sea and river waters were analysed to evaluate the performance of the proposed method. The high recoveries (>%97) indicates that the suggested protocol is acceptable for determination of Sm (III) ions in the water samples. تفاصيل المقالة

There is a growing interest in the development of new methods for extraction of REEs from nuclear wastes.In this study, we fabricated a novel material composed of 1,10-phenanthroline-2,9-dicarboxilic acid (PDA)functionalized magnetic graphene oxide (Fe3O4/GO) for extraction of Sm(III) from aqueous solutions. Ourinterest in selection of carboxyl-containing ligand was due to its good coordination characteristic with Sm(III) which can be used to design a new sorbent. Under the optimized extraction conditions, the calibrationgraph for Sm (III) was linear in a concentration range of 6.2-784.5 μg L-1 with a correlation coefficient of0.9900. A detection limit of 1.4 μg L−1 with an enrichment factor of 125 was obtained. Precisions, expressedas relative standard deviation for single-sorbent repeatability and sorbent-to-sorbent reproducibility,were 5.9% and 8.7% (n =5), respectively. Finally, spiked sea and river waters were analyzed to evaluate theperformance of the proposed method. The high recoveries (>%97) indicate that the suggested protocol isacceptable for determination of Sm (III) ions in the water samples. تفاصيل المقالة