Abstract
In this study, a novel organic-inorganic hybrid material IIGK@MnO(2) (2-naphthalenemethyl-isoleucine-isoleucine-glycine-lysine@manganese dioxide) was designed as a novel adsorbent for the removal of strontium ions (Sr(2+)). The morphology and structure of IIGK@MnO(2) were characterized using TEM, AFM, XRD, and XPS. The results indicate that the large specific surface area and abundant negative surface charges of IIGK@MnO(2) make its surface rich in active adsorption sites for Sr(2+) adsorption. As expected, IIGK@MnO(2) exhibited excellent adsorbing performance for Sr(2+). According to the adsorption results, the interaction between Sr(2+) and IIGK@MnO(2) can be fitted with the Langmuir isotherm and pseudo-second-order equation. Moreover, leaching and desorption experiments were conducted to assess the recycling capacity, demonstrating significant reusability of IIGK@MnO(2).