Insoluble chelating compositions

摘要

The present invention relates to insoluble compositions, which are capable of removing metal (e.g. selectively) from solution (e.g. Fe3+ from a liquid nutrient medium so as to lower the Fe3+ content to less than 0.1 mu M); the insoluble compositions comprise: a suitable insoluble carrier and organic co-ordinating sites covalently fixed to the surface of said carrier, said co-ordinating sites being capable of chelating Fe3+, Th4+ and/or UO22+.