▎ 摘　　要

NOVELTY - Polymeric composite membrane comprises: a nanohybrid comprising zeolitic imidazole framework-67 (ZIF-67) decorated carbon nanomaterial; and a polymeric membrane comprising a polymer comprising polysulfone, polyethersulfone, polyphenylenesulfone, polyarylethersulfone, polyimide, polyetherimide, polyetherketone, cellulose acetate, polycarbonate or polyphenylene sulfide, where the nanohybrid is embedded in the polymeric membrane. USE - The membrane is useful for removing heavy metals from water (claimed), preferably for removing e.g. copper, lead, cadmium and arsenic from wastewater. ADVANTAGE - The membrane: has the zeta potential value of -10 mV to -60 mV to remove the potentially toxic heavy metals from the wastewater having high removal efficiency; is stable enough to allow no or negligible leaching of embedded nanomaterials; has relatively hydrophilic nature (i.e. low water contact angle), which contributes toward high permeation flux, flux recovery and separation performance; and exhibits improved physicochemical properties, preferably surface properties and strength, which results in enhancing their separation efficiency and reusability for the separation application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the polymeric composite membrane, comprising (a) preparing the nanohybrid, (b) preparing a dope solution of polymer, and (c) vacuum degassing the polymer dope solution and using the solution to prepare the polymeric composite membrane by phase inversion.