| abstract |
PROBLEM TO BE SOLVED: To efficiently produce a porous adsorbent in which a porous material is loaded with crystalline hydrous zirconium hydroxide which selectively adsorbs fluoride ions, arsenic ions, phosphate ions and the like. SOLUTION: An alcohol solution containing ZrOCl 2 or ZrO (NO 3 ) 2 is brought into contact with a porous material to impregnate the porous material with the above zirconium compound, and then hydrolyzed with an alkali. Hydrothermal treatment at 180 ° C. |