Biomass charcoal coated nano zero-valent iron composite material for activating peroxymonosulfate to treat chlorobenzene polluted water body as well as preparation and application of biomass charcoal coated nano zero-valent iron composite material

The invention discloses a biomass charcoal coated nano zero-valent iron composite material for activating peroxymonosulfate to treat chlorobenzene polluted water body as well as preparation and application of the biomass charcoal coated nano zero-valent iron composite material. The preparation method comprises the steps of taking ferric nitrate and polyethylene glycol to be dissolved in water, and stirring to obtain a solution containing ferric nitrate and polyethylene glycol; adjusting the pH value of the solution to 11, and continuously stirring; adding straw into the solution, and stirring; putting into a hydrothermal kettle, heating at 220 DEG C for 10 hours, centrifuging, and respectively washing with water and absolute ethyl alcohol for a plurality of times; and drying the obtained product, placing the dried product in a tubular furnace, and calcining the dried product in a nitrogen atmosphere at 800 DEG C for 2 h to obtain the biomass charcoal coated nano zero-valent iron composite material. The compos