【摘 要】
：
The rational design of strong affinity adsorbents for heavy metal ions removal remains a critical challenge for water treatment.In this study,amorphous molybdenum sulfide composites (EDTA-MOSx (x =2,3))were fabricated via a facile hydrothermal method medi
【机 构】
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School of Environmental Science and Engineering,Tianjin University,Tianjin 300350,China;Research Cen
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The rational design of strong affinity adsorbents for heavy metal ions removal remains a critical challenge for water treatment.In this study,amorphous molybdenum sulfide composites (EDTA-MOSx (x =2,3))were fabricated via a facile hydrothermal method mediated by EDTA,which was applied to heavy metal ions (Cu2+,Cd2+,Pb2+,Zn2+ and Ni2+) removal from aqueous solutions.A case study for Cu2+ ions showed that the adsorption capacity of EDTA-MoSx (x =2,3) was superior to crystalline phase MoS2 at pH 6.0 with an initial concentration of 200 mg/L.Adsorption mechanisms of different sulfide groups and-COOH of EDTA-MoSx (x =2,3) were verified systematically via a series of experiments,characterizations,and density functional theory (DFT) calculations.Both bridging S22-and-COOH covalently bonded with Cu2+ ions were ascribed to the critical factors for this enhanced removal efficiency on the surface of EDTA-MoSx (x =2,3).This work offers a new method to enhance the adsorption performance of molybdenum sulfide-based materials by controlling crystallinity mediated with an organic complex small molecule.
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