The research presented here reports the utilization of biorenewable and waste resources for the development of versatile adsorbents for wastewater remediation. Lignin was blended with recycled poly(ethylene terephthalate) and spun into nanofibers of controlled diameter via electrospinning. The nanofibers were carbonized and activated under N2 and CO2 respectively at 600 oC, in order to transform them into activated carbon nanofibers (ACNFs). These ACNFs have a mesoporous structure with BET surface area around 314 m2/g and average pore width 6.7 nm. After treating them with HNO3, the ACNFs were used for the successful adsorption of Pb2+ ions from aqueous solutions. The fitting of the Langmuir adsorption isotherm reveals that they exhibit a theoretical maximum adsorption capacity of 23.75 milligrams of Pb2+ per gram of ACNFs.