Abstract In this work, pyrometallurgical treatment of non-ferrous iron residue was studied. This approach aimed to recover the valuable metals and convert into reusable benign slag using hydrogen as a non-fossil reducing agent. The for type involves pretreatment prior two stages, oxidation reduction. Hydrogen employed agent in cleaning. reduction tests were performed at temperatures 1200 °C, 12...

Anthocyanidins were synthesized to study the effect of methoxy substitution on the B ring to their antioxidant property. Comparative FRAP studies show 2'- and 4'-methoxy substituents have higher antioxidant activities, which may be attributed to both resonance and inductive effects.Graphical abstract:Anthocyanidins as reducing agents.