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Modified-MOF-808-Loaded Polyacrylonitrile Membrane for Highly Efficient, Simultaneous Emulsions Separation and Heavy Metal Ions Removal.

Oily wastewater, often containing heavy metal ions, is a common source of water pollution. In this study, a modified-MOF-loaded polyacrylonitrile membrane was designed and prepared via solvothermal reaction and electrospinning to simultaneously separate oil-in-water emulsions and adsorb heavy metal ions. The membrane shows superhydrophilicity and superoleophilicity in air, and underwater superoleophobicity, which enables the membrane to efficiently separate various oil-in-water emulsions. The strong adsorption capacity of MOF-808 allows this membrane to adsorb heavy metal ions at various concentrations in a short time. The separation efficiency reached 99.97%, and the highest removal efficiency of heavy metal ions reached 97.7%. Additionally, the membrane demonstrated excellent recyclability and corrosion resistance. Overall, the membrane is highly efficient in treating wastewater, and it has great potential for practical applications.