Original ResearchPublished 3 September 2026Ammonia-salt-assisted green hydrometallurgy for CuO nanosynthesis from waste PCBsSuzana Gotovac Atlagić · Milica Kosić · Tijana Kremenović · Željko Todorović · Predrag Ilić · Ljiljana Tankosić · Elvir Babajić · Eldin Halilčević · Andrzej Biessikirski · Andrzej BaziakFrontiers in Environmental Chemistrydoi 10.3389/fenvc.2026.1896574