▎ 摘　　要

NOVELTY - Method for preparing lanthanum hydroxide modified aerogel dephosphorization adsorbent, involves (a) synthesizing lanthanum hydroxide modified hydrogel by (i) dissolving graphene oxide in deionized water and ultrasonically dispersing to obtain graphene oxide dispersion liquid, (ii) dissolving lanthanum hydroxide in deionized water to obtain lanthanum hydroxide aqueous solution, dissolving sodium alginate in deionized water to obtain aqueous sodium alginate aqueous solution, (iii) uniformly mixing dispersion liquid of graphene oxide, lanthanum hydroxide aqueous solution and sodium alginate aqueous solution, and vigorously stirring at room temperature to obtain mixed solution, and (iv) dripping crosslinking agent aqueous solution to obtained mixed solution to obtain hydrogel beads under normal temperature condition, and leaving still for 18-24 hours to ensure that the obtained hydrogel beads are completely crosslinked and solidified, and (b) washing obtained hydrogel, and drying. USE - Method for preparing lanthanum hydroxide modified aerogel dephosphorization adsorbent. ADVANTAGE - The method solves the problems of low saturated adsorption capacity of current phosphorus removal adsorbent, is easy to recycle and reuse after adsorption, and ensures excellent mechanical properties, and the prepared adsorbent has excellent reusable property, fast adsorption speed, high adsorption capacity and excellent mechanical properties, and is economical.