Determination of the effective diffusion coefficient for gold(III) on a macroporous resin XAD-2 impregnated with triisobutyl phosphine sulfide

In this work the experimental and numerical techniques employed to estimate the diffusion coefficient of gold(III) in a macroporous particle of resin XAD-2 impregnated with triisobutyl phosphine sulfide (TIBPS) have been desc ribed. Batch and column experiments were performed in order to get the nece ssary experimental results to determine the effective diffusion coefficient , D-e. In the studied initial metal concentration range (39.3-196 mg/dm(3)) , D-e was found to increase with increasing the initial feed concentration from 1.28 X 10(-8) to 6.40 X 10(-8) m(2)/h. (C) 1999 Elsevier Science B.V. All rights reserved.