Photocatalytic reduction of selenate and selenite solutions using TiO2 powders

Authors
Sanuki, S Kojima, T Arai, K Nagaoka, S Majima, H
Citation
S. Sanuki et al., Photocatalytic reduction of selenate and selenite solutions using TiO2 powders, MET MAT T B, 30(1), 1999, pp. 15-20
Citations number
8
Categorie Soggetti
Metallurgy
Journal title
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
ISSN journal
10735615 → ACNP
Volume
30
Issue
1
Year of publication
1999
Pages
15 - 20
Database
ISI
SICI code
1073-5623(199902)30:1<15:PROSAS>2.0.ZU;2-0
Abstract
The photocatalytic reduction of aqueous solutions containing Se(VI) and Se( IV) was studied using TiO2 powders and an HCOOH reductant. Without the addi tion of a suitable reductant and UV irradiation, no significant reduction o f Se(VI) and Se(IV) can proceed. The ability of Se ions to be adsorbed onto TiO2 is an important factor in the ease of reduction of these ions, Elemen tal Se is directly produced from both Se(VI) and Se(IV) solutions. The maxi mum yield of elemental Se never reaches 100 pet, due to the initiation of H 2Se generation.