NITRATE ION ADSORBENT, METHOD FOR PRODUCING THE SAME, METHOD FOR REMOVING NITRATE ION BY USING THE SAME, AND METHOD FOR RECOVERING NITRATE ION BY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a nitrate ion adsorbent which exhibits high nitrate ion selective adsorptivity in a nitrate-ion-containing solution, especially, in a nitrate-ion-containing solution containing anions of another type.;SOLUTION: The nitrate ion adsorbent comprises as an effective component at least one member selected from the group consisting of a compound metal hydroxide represented by formula (1): M²⁺_1-xM³⁺_x(OH)₂[A^n-]_x/n×mH₂O (wherein M²⁺ is at least one divalent metal ion selected from the group consisting of an Mg ion and a Zn ion; M³⁺ is at least one trivalent metal ion selected from the group consisting of an Al ion and an Fe ion; A^n- is an n-valent anion; and x is a number satisfying 0.20≤x≤0.25) and having an interplanar spacing (003) of 8.05 to 8.15 Å and a hydrothermally treated product thereof.;COPYRIGHT: (C)2006,JPO&NCIPI