An experimental study of gold(III) transport through solid-supported liquid membranes using phospholene derivatives as carriers has been performed using batch experiments. A model is reported describing the transport mechanism which consists of a diffusion process through a feed aqueous diffusion layer, a fast interfacial chemical reaction and a diffusion of HAuCl4L and HAuCl4L2 through the membrane. The mathematical equations describing the rate of transport are derived and correlate the membrane permeability coefficient to diffusional and equilibrium parameters as well as the chemical composition of the system, such as extractant concentration in the membrane phase and HCl concentration in the feed phase. The experimental data are explained with the derived equations, and the diffusion resistances to mass transfer are evaluated. The influence in the transport of stirring speed in the feed phase, the nature of the diluent and stripping agent, and the type of polymeric support have been also discussed.