Flux. The laboratory experiment results revealed that the investigated novel membranebased electrowinning process was able to concentrate and recover a maximum of 1.02 g of Au from 2.0 L of WPCB iodide leachate after 6.0 hrs, as a deposit on the stainless-steel cathode in the electrowinning cell. Consequently, the average flux of Au ions through the 12 cm × 12 cm Au-IEM was determined to be 3.27 mg/m 2 .s or 8.4 × 10 -6 mol/m 2 .s. This flux is comparable to the 5.5 × 10 -6 to 14.8 × 10 -6 mol/m 2 .s Au flux reported by Sun et al., who studied the flux of Au ions through an ion exchange membrane comprised of a polyvinylidene fluoride back bone and [A336][SCN] carrier, during the recovery of Au in cyanide solution using a technique similar to the investigated membrane based electrowinning process (the process applied by Sun et al. is primarily differentiated by the absence of an AEM, and by the use of only a single electrolyte solution tank which hosted both the anode and cathode) . Any future scale-up of the novel membrane-based electrowinning process must take this flux into account.