Amino Modification of D301 Resin and Its Adsorption Characteristics to AuCl4

Glycidyl methacrylate(GMA) was grafted onto the surface of D301 resin to obtain grafting material D301-g-PGMA by using oxidation–reduction initiating system composed of the amino groups of D301 resin and ammonium persulfate in the solution, the amino modified functional adsorption material D301-g-APGMA was obtained via ring-opening reaction between epoxy groups of molecular chain of polyglycidyl methacrylate(PGMA) and amine groups of ethylenediamine. The effects of grafting polymerization conditions on grafting rate were examined, its structure was characterized, and adsorption to Au Cl4? also studied. The results showed that the grafting rate of PGMA could be as high as 41.15% under the conditions of GMA 10 m L, ammonium persulfate 1.5% of GMA mass, reaction for 18 h at 90 ℃. Compared with D301 resin, the adsorption ability of D301-g-APGMA to Au Cl4? was greatly improved, and the adsorption capacity reached up to 276.74 mg/g. And D301-g-APGMA also possessed excellent reproducibility and reusability.