| 摘要 |
<p>PURPOSE:To effectively perform the removal or recovery of the arsenic component in a gaseous phase generated in various industries, by bringing gas containing arsenic or an arsenic compound into contact with a solution layer containing an oxidizing agent while introducing the same into said solution layer. CONSTITUTION:Manganese peroxide or bichromate is used as an oxidizing agent to be dissolved in water or a solvent in a concn. of about 3.0% or more while the resulting solution is supported by iron, silicon or activated carbon to form an oxidizing layer and aresenic or an arsenic compound is brought into contact with the oxidizing layer while introduced into said layer. In this case, the holding amount of the oxidizing agent solution to the carrier is set to about 0.01- 0.5cm<3> per 1cm<3> of the layer. By this method, the arsenic component in a gaseous phase is effectively removed. Further, the carrier used in the removal of arsenic can be regenerated through the contact with water or an alkali solution and, in this case, the arsenic component can be recovered as a concn. liquid.</p> |
