MOF-5 anchored polymer@carbon core-shell nanofibers for efficient removal of chlortetracycline from aqueous solution

Antibiotics excreted by human or animal may contain un-degradable residues, which form high concentration accumulation in water, leading to seriously harmful effects on the environment. Herein, MOF-5 anchored polymer@carbon core-shell nanofibers (MAPC) are fabricated via the electrospinning-hydrothermal synthesis and used for high efficiency removing chlortetracycline (CTC) from water. The anchored MOF-5 enhances the adsorption ability of hydrothermal carbon core-shell nanofibers. The MAPC nanofibers exhibit 395.87 mg/g of adsorption capacity for CTC removal process, which well fitted with Freundlich isotherm model and pseudosecond-order kinetic model. After nanofiber membrane filtering, the removal efficiency of CTC is nearly 100 % at the concentration of 5 mg/L. And the chemical oxygen demand (COD) concentration of CTC is reduced from 156.72 mg/L to 50.39 mg/L, that is below the pharmaceutical wastewater discharge standard. In addition, MAPC exhibits high flux and good regeneration performance. This work gives a typical strategy of feasible preparation of high efficiency MOFs anchored carbon-based nanofiber adsorbent towards the pharmaceutical wastewater treatment.