The AEM used in the laboratory experiment was the AFX membrane (Neosepta and Astom Corporation). The AFX membrane is a homogenous AEM comprised of a poly-styrene-co-divinylbenzene base polymer with positively charged ion-exchange functional groups (which are typically propriety quaternary ammonium bases -(CH3)3N + )). The AFX membrane is also reinforced and interpenetrated with PVC. Method. The laboratory experiment investigating the feasibility of Au recovery from WPCB iodide leachates using a novel membrane-based electrowinning process commenced by loading 2.0 L of WPCB iodide leachate into the feed tank of the experimental electrowinning cell and loading 2.0 L of iodide electrolyte solution into the catholyte and anolyte tanks. Thereafter, electrical power was provided to the DC power supply connected to the electrodes in the cell, at a constant cell voltage of 12.9 V, temperature of 25 o C, 250 rpm agitation speed, average current of 5 A, and 1429 A/m 2 equivalent current density. After 6.0 hrs, the supply of electrical power was terminated, and the cathode was removed from the electrowinning cell. Thereafter, the dark-brown Au powder deposit on the cathode was scrapped off, weighed, and stored in a 100 mL container. A 25 mL sample solution was also collected from the feed and catholyte tanks after 2, 4, and 6 hrs. These sample solutions were placed in 50 mL containers for storage. The Au and BM concentration of the deposited Au and sample solutions from the feed tank and catholyte tank was determined through ICP-OES chemical analysis. Au recovery yield was then determined using equation 2. Where Y is the Au recovery yield, C1 is the amount of Au (in mg) in the WPCB iodide leachate before cell voltage is applied, and C2 is the amount of Au (in mg) deposited on the cathode. Y = (C2/C1) × 100(%) (