| abstract |
A chelate-forming filter having both the capability ofncapturing (removing), as a chelate, metals, metalloids orncompounds thereof and the capability of removing insolublenimpurities is disclosed, which is prepared by introducing anchelate-forming functional group represented by the followingngeneral formula (1) or (3) into a fiber molecule of a filternmaterial made of a natural fiber, a regenerated fiber, or ansynthetic fiber. A process for producing the same, and anprocess for the purification of a liquid using the filter arenalso disclosed.n n [wherein, G represents a chain sugar alcohol residue orna polyhydric alcohol residue, and R represents a hydrogennatom, a (lower) alkyl group, or -G (wherein G has the samenmeaning as defined above and may be a group identical tonor different from the aforementioned G)]n n (wherein each of R 1 , R 2 , and R 3 is a lower alkylene group,nand n denotes an integer of 1 to 4). |