Removal of Arsenic from Sulfuric Acid Solutions Using Jarosite and Sonication

• Published in: Japanese Journal of Applied Physics 2012-07, Vol.51 (7), p.07GD14-07GD14-5
• Main Authors: Hosokawa, Ryota, Okawa, Hirokazu
• Format: Article
• Language: English
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/JJAP.51.07GD14

We investigated the effect of ultrasound irradiation at 200 kHz on As(III) and As(V) removal using jarosite. When the solution containing As(V) was irradiated in air, Ar, or O 2 atmospheres, As(V) removal rate increased with irradiation time as compared with treatment by stirring. Likewise, when the solution containing As(III) was sonicated in Ar or O 2 atmospheres, the As removal rate increased with irradiation time because As(III) was oxidized to As(V) by the sonication and As(V) was removed from the solution by the adsorption onto jarosite. However, in air, the removal rate increased only slightly with irradiation time. This is partly because As(III) removal was interfered by the adsorption of HNO 3 , which was generated during sonication, onto jarosite. Therefore, As(V) removal by the simultaneous application of jarosite and ultrasound irradiation can be performed in air, Ar and O 2 atmospheres, while As(III) removal can be performed efficiently in either Ar or O 2 atmosphere.