Preparation method of geopolymer heavy metal ion adsorption material capable of being paved

The invention provides a preparation method of a geopolymer heavy metal ion adsorption material capable of being paved, and belongs to the field of heavy metal ion adsorption materials. The preparation method of the adsorption material comprises the following steps: adding water glass into a mixed solid waste raw material of slag and fly ash, adding carboxymethyl chitosan and a proper amount of water at the same time, ensuring that the total solid-to-liquid ratio is 1: 0.7, and rapidly stirring to prepare slurry; pouring the slurry into a mold, oscillating for 2-5 minutes, curing at room temperature, and demolding; and putting a molded part after demolding into a curing box, and curing for 8-14 days at 60-70 DEG C to obtain the block modified geopolymer heavy metal ion adsorption material capable of being paved. The block adsorbing material can be directly paved at the bottom of a road or a river runner to actively adsorb flowing heavy metal ions; on the other hand, solid waste utilization can be achieved, th