As one of porous metal-organic frameworks, zeolitic imidazolate frameworks (ZIFs) are typical crystalline materials with tetrahedral clusters (e.g., ZnN4 and CoN4) linked by imidazolate ligands. Due to the facile synthesis,...

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A novel nanoscale zero-valent iron/molybdenum disulfide (nZVI/MoS 2 ) composite was synthesized and well characterized in detail. The as-prepared materials were applied for the removal of U(VI) from water solutions under various experimental conditions. The characterizations showed that nZVI/MoS 2 composites exhibited a high surface area and uniform distribution of nZVI. The maximum adsorption capacities of nZVI/MoS 2 obtained from the Langmuir model (71.8 mg/g at pH 4.0 and 25 °C) were higher than that of MoS 2 (39.92 mg/g) due to the synergistic effect. According to the fitting of surface complexation modeling, U(VI) removal on nZVI/MoS 2 included cation exchange and inner-sphere surface complexation at low and high pH, respectively, whereas the adsorbed U(VI) was partly reduced into U(IV) by nZVI/MoS 2 composites. According to analysis of XPS analysis, the enhanced removal of U(VI) on nZVI/MoS 2 was due to the complexation of U(VI) with various oxygenated functional groups (e.g., −OH, Fe−O, and Mo−O functional groups) and then adsorbed U(VI) was reduced to U(IV) by Fe 0 and/or Fe(II). These findings showed that nZVI/MoS 2 could be used as efficient adsorbents for the high elimination of U(VI) from contaminated wastewater in environmental pollution cleanup.