| 摘要 |
A method and system of removing arsenic from aqueous solutions is provided. Specifically, the aqueous solution includes arsenic, said arsenic being present in the +3 oxidation state. Arsenic can also be present in the +5 oxidation state. The pH of the aqueous solution is first adjusted to a pH in the range of about 3 to 5. Iron salts , such as ferric or an ferrous salts, are introduced into the aqueous solution. Hydrogen peroxide is added to the aqueous solution wherein the arsenic present in the +3 oxidation state is oxidized to the +5 oxidation state. Next, the pH of the aqueous solution is adjusted to a value in the range of about 5 to 8 to form an insoluble ferric hydroxide compound including arsenic in the +5 oxidation state adsorbed onto the compound which is then removed from the aqueous solution.
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