| 摘要 |
Heavy metals can be fixed to solid carriers to which an alpha -amino- or an alpha -iminohydroxamate ligand has been covalently bound. The ligand can have the structural formula <IMAGE> wherein R1 and R2 represent H or an alkyl, or may be a compound of two or more hydroxamate substituents. The carrier can be formed of polysaccharides, polygalactanes, polyacrylates or silica dioxide. The adsorbent is prepared by an alpha -aminohydroxamate in an aqueous solution having a pH value of 4-9 being brought into contact with an aldehyde derivative of a carrier, followed by reduction with sodiumborohydride or sodiumcyanoborohydride. |
