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Continuous photocatalytic treatment of mercury(II) on titania powders. Kinetics and catalyst activity

✍ Scribed by M.A Aguado; S Cervera-March; J Giménez

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 757 KB
Volume: 50
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(95)00001-l

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✦ Synopsis

The photocatalytic reduction of mercury(II) to metallic mercury using irradiated titania powders has been studied in a continuous system. The influence of oxygen, pH, gas and liquid recirculation flows, mercury(II) and titania concentrations on the photocatalytic reduction of Hg(II) was evaluated. The photocatalytic reduction of mercury(II) varied with pH, oxygen and titania concentration. The reaction is first order with respect to the Hg(II) concentration. Metallic mercury deposited on titania affected the rate of mercury(II) reduction. An activation~leactivation model has been fitted to explain these phenomena.

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