| abstract |
Provided is a method for preparing an anion adsorbent, comprising the steps of: mixing two or more metal salts to prepare a stacking structure in which cationic compound layers and anionic compound layers comprising anions and water of crystallization are alternately stacked on one another; subjecting the stacking structure to primary heat treatment to expand a gap between the cationic compound layers, thereby preparing a preliminary anion adsorbent; and subjecting the preliminary anion adsorbent to secondary heat treatment to remove the anions and the water of crystallization of the anionic compound layers, except that at least one of the anions remains, thereby preparing an anion adsorbent. |