| abstract |
Provided is an adsorbent for phosphoric acid which can be produced with ease, exhibits high adsorbability of phosphoric acid and is free from any problems in use thereof. The adsorbent for phosphoric acid which includes a water-insoluble reaction product formed by mixing an iron ion and a natural polysaccharide having a carboxylic functional group or a sulfuric acid functional group such as alginate, pectin and carrageenan in a solution, or a dried product thereof. The additional incorporation of a hydrophilic polymer such as agar into the adsorbent prevents the reduction in adsorbability of phosphoric acid in the case where a trivalent iron ion is used to produce the dried product of a water-insoluble reaction product. |