Zinc aluminum silicate/granular red mud composite material of Zn2+-modified industrial waste red mud, preparation method and application thereof

A preparation method of a ZAS/GRM composite material of Zn2+-modified industrial waste red mud, comprising following steps:

• S1, adding red mud, fly ash, a binder and a pore-forming agent into water for mixing, then carrying out granulation to obtain GRM, and then carrying out air drying and roasting on the GRM to obtain porous GRM particles;
• and
• S2, immersing the porous GRM particles into a solution containing Zn2+, stirring, filtering and drying to obtain a zinc aluminum silicate/granular red mud adsorbent, a ZAS/GRM adsorbent, then obtaining a ZAS/GRM composite material of Zn2+-modified industrial waste red mud by subjecting the ZAS/GRM adsorbent to roasting treatment.