| 摘要 |
<p>A media for removal of arsenic from an acqueous system comprising a mixture of: activated bauxite, aluminum trihydrate and a ferric compound selected from the group consisting of ferric hydroxide, ferric oxyhydroxide, ferric hydroxyoxide and mixtures thereof. The mixture is preferably calcined and is thereafter formed into a powder, granules or extruded particles. Preferably, the mixture prior to calcination also contains a natural or synthetic filler which has the capability of modifying the prosity of the mixture. Removal of arsenic from the acqueous system is readily accomplished by contacting the acqueous system with the media until the arsenic is substantially removed from the acqueous system. If arsenic is present in the acqueous system in the +3 valence state, the acqueous system is preferably oxidized to convert the arsenic to the +5 valence state prior to contact of the acqueous system with the media.</p> |
