Magnetic metal-organic frameworks for efficient removal of cadmium(II), and lead(II) from aqueous solution

Efficient and convenient methods for the removal of toxic heavy metal ions especially Cd(II) Pb(II) from aqueous solutions is great importance due to their serious threat public health ecological system. In this study, two magnetic metal-organic frameworks (namely: Fe3O4@ZIF-8, Fe3O4@UiO-66–NH2) were synthesized, fully characterized, applied adsorption solutions. The efficiencies prepared nanocomposites are strongly dependent on pH solution. maximum capacities Fe3O4@UiO-66–NH2, Fe3O4@ZIF-8 at 6.0 calculated be 714.3 mg·g−, 370 mg·g−1 Cd(II), respectively, 833.3 mg·g−1, 666.7 Pb(II), respectively. process follows a pseudo-second-order model fit Langmuir isotherm model. Moreover, thermodynamic studies revealed that endothermic, spontaneous in nature. A plausible mechanism was discussed detail. adsorbents: Fe3O4@UiO-66–NH2 showed excellent reusability, maintaining same efficiency least four consecutive cycles. These results reveal potential use as efficient adsorbents removing