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

Waste Management 2026 Open access

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Authors: Amir Nobahar, Flávia Nogueira Braga, Filipe H.B. Sosa, Nicolas Schaeffer, João A.P. Coutinho, Helena Passos
DOI: 10.1016/j.wasman.2026.115349
Cited by: 3
References: 76

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.

Fields of Study & Subjects

Adsorption and biosorption for pollutant removal Extraction and Separation Processes Metal Extraction and Bioleaching

Publication details

Journal / source
Waste Management
Publisher
Elsevier BV
Volume
212
Pages
115349–115349
Publication date
15 January 2026
Language
EN