Investigation of gold(iii) adsorption properties of 1,8-diaminonaphthalene-formaldehyde polymer

In the present work, 1,8-diaminonaphthalene-formaldehyde (1,8-DAN-F) polymer was synthesized by the reaction of 1,8-DAN with formaldehyde solution and 1,8-DAN-F polymer in the ratio of 25% was mixtured with PVC using THF solvent. 1,8-DAN-F/PVC polimer was used for selective separation and recovery of Au(III) ions using batch and column methods. The structure of 1,8-DAN-F polymer was examined by FTIR analysis.The effects of pH level and initial concentration on the adsorption of Au(III) ions were examined. The optimum pH level was found to be 1 for the adsorption. This data obtained from the adsorption studies at different initial concentrations were applied to the Langmuir and Freundlich isoterms. It was seen that the adsorption data fitted well to the Langmuir isotherm. The maximum adsorption capacity of the 1,8-DAN-F/PVC polymer for Au(III) ions was found to be 119,04 mg/g.In the column studies, it was examined the seperation of Au(III) ions from Fe(III), Cu(II) and Ni(II) ions. The studies showed that Au(III) ions could be separated and concentrated from the base metal ions.