| abstract |
The invention discloses an iron-carbon composite material, a preparation method and application thereof. The iron-carbon composite material has a three-layer core-shell structure, and sequentially comprises a porous graphite carbon outer layer, an iron carbide intermediate layer and a nano-zero valence layer from outside to inside. Iron core. In the present invention, nano-zero-valent iron is coated in porous graphite carbon and iron carbide, which can prevent the oxidation of nano-zero-valent iron, and the existence of iron carbide can effectively improve the fixation ability of arsenic, and realizes the high-efficiency and high-efficiency of nano-zero-valent iron. Long-term utilization, it has a strong adsorption and fixation capacity for arsenic, especially it can efficiently oxidize As(III) into relatively low-toxic As(V). |