Photoreduction of toxic chromium using TiO sub(2)-immobilized under natural sunlight: effects of some hole scavengers and process parameters

This work focuses on the photocatalytic reduction of Cr(VI)-Cr(III) using TiO sub(2)-immobilized onto glass slides under natural sunlight. The commercial TiO sub(2) Degussa P25 was used as a photocatalyst in this work. The effects of some additives as hole scavengers for Cr(VI) reduction are studied...

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Bibliographic Details
Published in:Desalination and water treatment 2015-08, Vol.55 (7), p.1900-1907
Main Authors: Djellabi, R, Ghorab, M F
Format: Article
Language:English
Subjects:
Chromium
Ethyl alcohol
Process parameters
Reduction
Scavengers
Sunlight
Titanium dioxide
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Summary:This work focuses on the photocatalytic reduction of Cr(VI)-Cr(III) using TiO sub(2)-immobilized onto glass slides under natural sunlight. The commercial TiO sub(2) Degussa P25 was used as a photocatalyst in this work. The effects of some additives as hole scavengers for Cr(VI) reduction are studied. The results show that their presence enhances the reduction rate in the order: tartaric acid > oxalic acid > EDTA > ethanol > methanol > no-additive. The optimization of tartaric acid concentration is determined. The effect of process parameters such as Cr(VI) concentration, pH, and the presence of interfering substances such as inorganic anions.
ISSN:1944-3994
1944-3986
DOI:10.1080/19443994.2014.927335