High-salinity wastewater nitrate radical adsorbent preparation method

The invention belongs to the field of sewage treatment, and particularly relates to a high-salinity wastewater nitrate radical adsorbent preparation method. According to the preparation method, hydrotalcite with an adjustable and controllable interlayer structure and polypyrrole modified montmorillonite are respectively prepared; the surface electrical property of a material is changed by utilizing characteristics of adjustable types and adjustable number of the cations of the hydrotalcite polar plate; steric hindrance is formed by using modification with montmorillonite polypyrrole; and finally the hydrotalcite and the montmorillonite are subjected to composite bonding intercalation to form a layered structure composite material with a certain steric hindrance, wherein the material is applied to adsorption of nitrate radicals in high-salt wastewater (especially high-salt wastewater with high sulfate radical content), and has good adsorption selectivity and good adsorption capacity, wherein the removal rate o