▎ 摘　　要

NOVELTY - Degradation of N-nitrosodimethylamine (NDMA) involves adding graphene/iron-based metal-organic framework (MOF) composite nanomaterials and potassium persulfate to a water body to be treated containing N-nitrosodimethylamine, and transferring the water body to a dark condition for stirring reaction. USE - Degradation of NDMA in water body. ADVANTAGE - The method: promotes high-efficiency degradation of NDMA through combination of active free radicals in the form of hydroxide radical and sulfate radical on NDMA; and effectively prevents the MOF from agglomeration and being corroded during the catalytic degradation of NDMA. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of the NDMA degradation method, which involves pretreating disinfected water body to make the concentration of NDMA in the water of less than or equal to 1 mg/L, and the pH of 3-7, then adding graphene/iron-based MOF composite nanomaterials and potassium persulfate to the water body to make the concentration of graphene/iron-based MOF composite nanomaterials of 0.5 mg/mL and the concentration of potassium persulfate of 2 mmol/L, transferring the water body to the dark condition, stirring and reacting at 200 rpm for 90 minutes, heating the water at more than 70 degrees C and stirring for 10-30 minutes, subjecting to natural sedimentation or centrifugal filtration to obtain water body degraded by NDMA.