Preparation method of firework charcoal material adsorbent for adsorbing methyl blue

The invention discloses a preparation method of a firework biochar material adsorbent for adsorbing methyl blue, which comprises the following steps: S1, cleaning waste fireworks with ultrapure water,and drying the material to obtain clean firework buds; s2, shredding, grinding and sieving the dried firework buds to obtain firework powder, adding the firework powder into a certain amount of phosphotungstic acid solution, and uniformly stirring the materials to obtain a mixed solution; and S3, filtering and drying the mixed solution to obtain brown powder, grinding the brown powder by using aball mill, calcining the brown powder in a tubular furnace under the protection of inert gas, and drying the calcined brown powder to obtain the biochar material adsorbent. The biochar material adsorbent prepared by the method provided by the invention has a very good adsorption effect on methyl blue in a water body, and the used adsorbent can be reused after being washed by an organic solvent, still has a very good adsorp