Patent ID: 8445404

Claim:
A method of forming a zirconium-loaded fibrous adsorbent material having phosphoryl groups, the method comprising: grafting a reactive monomer having phosphoryl groups onto a polymeric substrate; and loading zirconium on the phosphoryl groups, which have been grafted onto the polymeric substrate, such that the zirconium-loaded fibrous adsorbent material has a zirconium content in an amount of 4.0 to 4.2 mmol/g wherein the reactive monomer having phosphoryl groups is selected from the group consisting of: a material of formula: CH 2 ═C(CH 3 )COO(CH 2 ) 1 OCO—R—CO—OPO(OH)R′ wherein R is an optionally substituted (CH 2 ) m group or C 6 H 4 group, wherein R′ is a hydroxyl group or a CH 2 ═C(CH 3 )COO(CH 2 ) n OCO—R—CO—O— group, and wherein l, m and n are each independently an integer of 1-6, di(2-methacryloyloxyethyl)acid phosphate, di(2-acryloyloxyethyl)acid phosphate, and mixtures thereof; and wherein the polymeric substrate is a fiber, and the fiber is formed of at least one material selected from the group consisting of polypropylene, polyethylene and polyester.