AMINOALKYLPHOSPHONIC ACID CONTAINING LIGANDS ATTACHED TO SOLID SUPPORTS FOR REMOVAL OF METAL IONS

摘要

A method for the removal and concentration of desired ions such as Sb3+, Zr4 +, Zn2+, Pu4+, Hf4+, Cu2+, Ni2+, Fe3+, Cd2+, Ag+, and Hg2+ from a multiple ion source solution which may contain larger concentrations of other undesired ions including H+ comprises bringing the source solution into contact with a compound comprising an aminoalkylphosphonic acid containing ligand covenlently bonded through an organic spacer silicon grouping to a solid inorganic support. The am- inoalkylphosphonic acid containing ligand portion(s) of the compound has an affinity for the desired ions to form a com- plex thereby removing the desired ions from the source solution. The desired ions are removed from the compound by con- tacting the compound with a much smaller volume of a receiving solution havi ng a greater affinity for the desired ions than does the aminoalkylphosphonic acid containing ligand portion of the compound . The process is useful in removing desired or unwanted ions of Sb(III) from acidic waste streams, streams containing concentrated Cu(II), Ni(II), Zn(II), and Ag(I), and also the removal of Zr(IV), Pu(IV) and Hf(IV) from nitric acid solutions containing large amounts of other ions as well removal of unwanted ions from other industrial or environmental streams.