Photochemical treatment of As(III) with α-Fe2O3 synthesized from Jarosite Waste

Abstract

Endeavoring to mitigate and remedy Arsenic (As) in groundwater, we developed a one-step process for As(III) oxidation and subsequent adsorption by using α-Fe₂O₃ under UV irradiation. The α-Fe₂O₃ with high surface area was successfully prepared through a mild hydrothermal reaction using Jarosite waste as precursor. During the treatment of As(III) in aqueous solution, the as-obtained α-Fe₂O₃ can release ferric ions stimulated by UV irradiation. This led to the effective oxidation of As(III) to As(V) which is further adsorbed on α-Fe₂O₃, realizing the removal of As from water. This simple and efficient route may be potential for the remediation of polluted water containing As ions.