| 摘要 |
<p>The method consists in the treatment of water that contains, in solution, arsenic as the only pollutant, or water that contains arsenic in the presence of other pollutants, such as ammonia, methane, iron, manganese, by dissolving iron by electrolytic means in the water itself. The dissolved iron is oxidized into trivalent iron and the arsenic is oxidized from trivalent to pentavalent, by means of the aeration of the water, with consequent saturation in dissolved oxygen. The dissolved oxygen, by means of the catalysis of metal oxides that are present on the surface of a filtering granulate, is able to oxidize the iron and the arsenic, which co-precipitate together directly on the surface of the filtering granulate, increasing the thickness of the film. <IMAGE></p> |
