Photocatalytic reduction of selenate and selenite solutiond using TiO2 powders

摘要

The Photocatalytic reduction of aqueous solutions containingSe(VI) and Se(IV) was studied using TiO2 powders and an HCOOHreductant. Without the addition of a suitable reductant and UVirradiation, no significant reduction of Se (VI) and Se (IV) canproceed. The ability of Se ions to be adsorbed onto TiO2 is animportant factor in the ease of reduction of these ions.Elemental Se is directly produced from both Se (VI) and Se (IV)solutions. The maximum yield of elemental Se never reaches 100pct, due to the initiation of H2Se generation.