P06 廃石と超音波を利用したヒ素の除去(ポスター発表)

概要

論文の詳細を見る
The valence of arsenic in aqueous solution is usually trivalent or pentavalent, and arsenic mainly forms As(III) as arsenious oxide in the effluent. Compared to the adsorption processes of As(III) using trivalent iron compounds, the adsorption processes of As(V) is easier to handle. The adsorption process of As(III) requires the oxidation from As(III) to As(V) using oxidants. Therefore it is crucial to oxidize As(III) to As(V) with high efficiency. In this study, we performed the removal of As(III) in the aqueous solution using sonochemical oxidation and trivalent iron compounds. We confirmed that the ratio of oxidation As(III) to As(V) became high with increasing irradiation time. In addition, it became evident that the treatment of As(III) solution with ultrasound irradiation in combination with the application of trivalent iron caused residual As concentration in the solution lower than that treated only by the trivalent iron.
日本ソノケミストリー学会の論文
2010-10-21