Work

Waste–to–waste valorization: Sustainable palladium recovery from real spent catalytic converter leachates using chicken feathers

Year: 2026

Type: article

Abstract: . Desorption tests demonstrated ∼100% Pd recovery using 0.2 M thiourea + 0.5 M HCl solution. Characterization of the CF by Raman and solid-state UV-Vis spectroscopy, FTIR, SEM-EDX, and XPS confirmed the interaction of Pd with disulfide bonds and protonated amino groups as Pd-chloride complexes. Bench-scale trials on HCl-based leachates with an optimized CF to leachate ratio achieved near-complete Pd separation in a single adsorption step with high purity, highlighting the robustness and selectivity of this method under realistic conditions. Pd was successfully desorbed from CF by acidified thiourea solution, offering added value for catalytic applications.

Source: Waste Management

DOI: 10.1016/j.wasman.2026.115349

Authors: Amir Nobahar, Flavia N. Braga, Filipe H.B. Sosa, Nicolas Schaeffer, João A.P. Coutinho, Helena Passos

Institutions: University of Aveiro, Universidade do Porto

Language: English

Topic: Extraction and Separation Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Clean water and sanitation

Open Access status: hybrid

Estimated APC paid: $4,450