The disposal of electronic waste (E-waste), encompassing discarded items such as computers, televisions, fridges, cellphones, and associated cabling, presents a significant challenge to both societal welfare and environmental health. Addressing e-waste management is critical to achieving several of the Sustainable Development Goals (SDGs). This study introduces a novel approach to repurposing aluminum from discarded electrical cables for the creation of high-efficiency electrodes that can detect oxalic acid in human urine samples. The process involves stripping 2mm thick cables to yield 7cm long aluminum rods. These rods are then coated with MoS2 nanoparticles via a hydrothermal synthesis technique. X-ray diffraction (XRD) analysis confirms the presence of MoS2 in the 1T phase, while Fourier-transform infrared spectroscopy (FTIR) and Raman spectroscopy provide insights into the vibrational modes and chemical composition. Field emission scanning electron microscopy (FESEM) imaging depicts the MoS2 as having a flower-like nanostructure composed of interwoven nanosheets. The resulting nanocomposite sensor demonstrates an enhanced electrical current response, along with notable selectivity and stability, likely due to the combined effects of the MoS2 materials. The sensor’s amperometric signal is directly correlated with the oxalate ion concentration within a range of 10 to 300 μM and exhibits a detection threshold as low as 2 μM. This sensor technique was evaluated alongside a standard colorimetric assay for measuring oxalic acid levels in urine specimens. Findings indicated a strong correlation (R=0.954) between oxalic acid concentrations assessed using the biosensor and those obtained through the colorimetric approach.Keywords: E-waste, Aluminum Electrodes, MoS2 Nanoparticles, Oxalic Acid Detection, and Electrochemical Sensing, Figure 1