▎ 摘　　要

NOVELTY - Treating heavy metal wastewater involves mixing adsorption material with heavy metal wastewater, and using a magnetic separation method to separate the adsorption material from the wastewater. The adsorption material includes a substrate layer, where the substrate layer is graphene oxide, flake boron nitride, and boron nitride aerogel. A functional layer is provided for covering the surface of the substrate layer. The functional layer has a thickness of 7-8 nm. The functional layer is a polydopamine film modified with 3-aminopropyltriethoxysilane. The magnetic particles are distributed between the base layer and the functional layer, where the magnetic particles are ferroferric oxide and elemental nickel. The magnetic particles have a particle size of 1-50 nm. USE - Method for treating heavy metal wastewater. ADVANTAGE - The method treats the heavy metal wastewater in a simple, cost-effective and eco-friendly manner with high-efficiency water purification.