The selectivity of clay-based microfiltration ceramic membranes used for the filtration of heavy metal ions is investigated using electrochemical techniques such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), multi-sweep cyclic voltammetry (MCV) and linear scan anodic stripping voltammetry (LSASV). The membrane supports prepared from raw clay and activated carbon (GR-5%RC) are sintered to different temperatures ranging from 250 (GR-5%CS@250°C) to 1100°C (GR-5%CS@1100°C). The membranes are characterized by gravimetric, porosity measurements, X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) equipped with energy disperse spectroscopy (EDS). Initially, CV analysis was conducted to evaluate the influence of clay loading from 1 to 10 % (w/w) on the electrodes. The membranes/electrodes possessed a decrease in the electroactive surface area (ESA) at higher sintering temperatures as a result of membrane structural changes. Nyquist plot for GR-5%CS@1000°C exhibited good conductivity and showed increased electron transfer at the electrode/solution interface. GR-5%RC exhibited high ESA towards Fe(II) ions while GR-5%CS@1000°C possessed high ESA towards Pb(II) ions. This suggests that when GR-5%CS@1000°C is used as a membrane/electrode, the mobility of Pb(II) ions is found to increase, resulting in an increase in the number of reduced Pb(II) ions on the surface of the clay membrane/electrode. According to this study, Pb(II) ions can be successfully filtered through the proposed membrane/electrode and can accumulate better than Fe(II) at the membrane/surface electrodes before being subjected to filtration. The selectivity of our proposed membrane followed the order: Pb2+ > Cu2+ > Hg2+ > Cd2+, according to the stripping peak currents for single metal ion filtration. In a multi-component system, our membrane was more selective towards Pb2+ and Cu2+. Overall, these results sugges