PURPOSE: An uranyl ion trapping agent comprising a specified macrocyclic hexacarboxylic acid.
CONSTITUTION: A macrocyclic hexacarboxylic acid of formula I [wherein X1, X3 and X5 are -COOH, formula II (where R1 is H, an alkyl or aromatic group), -SO3H, -PO3H, or -PO4H; X2, X4 and X6 are, in addition to the above-mentioned groups, H, an alkyl, aromatic group, -COOR2 (where R2 is an alkyl or aromatic group), formula III (where R11 and R12 are same as R1), -COR1, -CN, -SOR2, -SO2n, formula IV (where R21 and R22 are same as R2), -SO2R2, -NO2, -PO3R21R22, or -PO4R21R22; W is formula V (where n is 2W18), or one, in which 1W9 carbon atoms are substituted by hetero atoms, etc.]. The compound of the formula I is used as such or in the form of a high-molecular compound obtained by the reaction with an aminomethyl group-containing styrene polymer, as an uranyl ion trapping agent.
OBUIE YOSHIAKI
