Removal of diclofenac sodium from water using a polyacrylonitrile mixed-matrix membrane embedded with MOF-808

Abstract

MOF-808, owing to the synergistic effect of its large surface area and surface charge matching, showed a diclofenac sodium (DCF) removal capacity as high as 630 mg g⁻¹, and the ability to adsorb 436 mg g⁻¹ DCF in two hours, outperforming many common Zr-MOFs under the same conditions. Importantly, a series of free-standing mixed-matrix membranes made by combining polyacrylonitrile with MOF-808 were fabricated and exhibited high efficiency of removing DCF from water via an easily accessible filtration method.