<p>In this study, a novel magnetically recoverable nanocomposite (AmGO–TA/Fe₃O₄) was synthesized by electrochemical deposition and functionalized with tannic acid and aminated graphene oxide. This eco-friendly nanocomposite demonstrates high adsorption capacity and can be efficiently regenerated by an electrochemical process, enabling durable and sustainable Pb²⁺ removal from water. The incorporation of amino groups in the graphene oxide modification was a critical step in enhancing adsorption properties. The synthesized materials were characterized using FT-IR, VSM, EDX, FE-SEM, and XRD techniques. Response surface methodology (RSM), based on the central composite design (CCD), was applied to analyze and model the adsorption data. The maximum lead removal efficiency (97.86%) was achieved at a solution pH of 6.67, an initial lead concentration of 19.3 mg/L, and a contact time of 73 min. Adsorption data for lead (Pb²⁺) on the novel AmGO-TA/Fe₃O₄ nanocomposite aligned with the Langmuir isotherm model, indicating negligible interaction between Pb²⁺ ions during the adsorption process. The maximum adsorption capacity of AmGO-TA/Fe₃O₄ was 344.83 mg/g, comparable to similar magnetic graphene–based adsorbents. Reusability studies demonstrated stable performance over eight adsorption cycles. Additionally, the nano-adsorbent was efficiently recovered by an electrochemical regeneration process, which rapidly reconstituted the Fe₃O₄ nanoparticles on the surface of AmGO-TA. These results highlight the novelty and practicality of AmGO-TA/Fe₃O₄ as a durable, high-performance material for lead removal.</p>