Abstract:Fe-Si-B amorphous alloy ribbons (Fe-Si-BAR) were successfully prepared by melt-spinning method. Its removal performance and mechanism of Pb(Ⅱ) in water were studied and compared with 48 μm iron powder (FeCP).The results show that under the same experimental conditions, the surface normalized reaction rate constant of Fe-Si-BAR to remove Pb(Ⅱ) in water is 87 times of FeCP. The analysis shows that the excellent removal performance of Fe-Si-BAR is ascribed to unique atomic structure of amorphous alloy and addition of Si and B. The zero-valent iron in metastable state has greater reactivity, and the disordered arrangement of atoms improves reactive sites on surface of amorphous ribbons. Addition of Si and B makes the product layer easily lose support and fall off from surface of ribbons, which enables zero-valent iron in inner layer to fix Pb(Ⅱ) by a more efficient reduction and removal method.