| 摘要 |
1482930 Removal of metal ions from solution LAPORTE INDUSTRIES Ltd 5 May 1975 [21 May 1974] 22640/74 Heading C1A Metal ions, capable of forming co-ordination complexes, are removed from aqueous solutions by contacting the solution with a complexing agent comprising a water insoluble inorganic substrate, having a cation exchange capacity of at least 0�5 m.eq./g., which has onium cations (as defined) ionically bound to the substrate. The substrate is preferably a clay mineral having a layered anionic lattice based on Si or P, e.g. layers of linked SiO 4 tetrahedra, e.g. a member of the smectite group or a bentonite clay mineral. The complexing agent may be used as a bed through which the metal containing solution may be passed or the agent can be slurried in the metal containing solution and the metal loaded agent separated by filtration. Examples are given of the removal of Hg, Na, Cu, Fe, Ni, Al, Co, Mg, Cr, Mn, Zn and Cd ions from solution. |
