TiO<inf>2</inf> catalysed reduction of Cr(VI) in aqueous solutions under ultraviolet illumination

J. Muñoz; X. Domènech

doi:10.1007/BF01076066

TiO<inf>2</inf> catalysed reduction of Cr(VI) in aqueous solutions under ultraviolet illumination

J. Muñoz, X. Domènech

Department of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

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Abstract

The photoassisted reduction of Cr(VI) to Cr(III) in aqueous suspensions of TiO2 under ultraviolet (UV) illumination has been studied by determining the amount of Cr(VI) photoreduced at different irradiation times, the mass of catalyst in suspension, the Cr(VI) initial concentration and the pH. Samples of wastes from metal-surface treatment industries have been used to test this photocatalytic procedure for Cr(VI) elimination in a real ease. It has been observed that the presence in these samples of certain species such as Fe(III) and Cr(III) at low concentrations can increase significantly the yield of Cr(VI) photoreduction. It is assumed that these cations act by maintaining the pH during the photoreduction process, preventing the alkalization by hydrolysis of the solution. © 1990 Chapman and Hall Ltd.

Original language	English
Pages (from-to)	518-521
Journal	Journal of Applied Electrochemistry
Volume	20
Issue number	3
DOIs	https://doi.org/10.1007/BF01076066
Publication status	Published - 1 May 1990

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title = "TiO2 catalysed reduction of Cr(VI) in aqueous solutions under ultraviolet illumination",

abstract = "The photoassisted reduction of Cr(VI) to Cr(III) in aqueous suspensions of TiO2 under ultraviolet (UV) illumination has been studied by determining the amount of Cr(VI) photoreduced at different irradiation times, the mass of catalyst in suspension, the Cr(VI) initial concentration and the pH. Samples of wastes from metal-surface treatment industries have been used to test this photocatalytic procedure for Cr(VI) elimination in a real ease. It has been observed that the presence in these samples of certain species such as Fe(III) and Cr(III) at low concentrations can increase significantly the yield of Cr(VI) photoreduction. It is assumed that these cations act by maintaining the pH during the photoreduction process, preventing the alkalization by hydrolysis of the solution. {\textcopyright} 1990 Chapman and Hall Ltd.",

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T1 - TiO2 catalysed reduction of Cr(VI) in aqueous solutions under ultraviolet illumination

AU - Muñoz, J.

AU - Domènech, X.

PY - 1990/5/1

Y1 - 1990/5/1

N2 - The photoassisted reduction of Cr(VI) to Cr(III) in aqueous suspensions of TiO2 under ultraviolet (UV) illumination has been studied by determining the amount of Cr(VI) photoreduced at different irradiation times, the mass of catalyst in suspension, the Cr(VI) initial concentration and the pH. Samples of wastes from metal-surface treatment industries have been used to test this photocatalytic procedure for Cr(VI) elimination in a real ease. It has been observed that the presence in these samples of certain species such as Fe(III) and Cr(III) at low concentrations can increase significantly the yield of Cr(VI) photoreduction. It is assumed that these cations act by maintaining the pH during the photoreduction process, preventing the alkalization by hydrolysis of the solution. © 1990 Chapman and Hall Ltd.

AB - The photoassisted reduction of Cr(VI) to Cr(III) in aqueous suspensions of TiO2 under ultraviolet (UV) illumination has been studied by determining the amount of Cr(VI) photoreduced at different irradiation times, the mass of catalyst in suspension, the Cr(VI) initial concentration and the pH. Samples of wastes from metal-surface treatment industries have been used to test this photocatalytic procedure for Cr(VI) elimination in a real ease. It has been observed that the presence in these samples of certain species such as Fe(III) and Cr(III) at low concentrations can increase significantly the yield of Cr(VI) photoreduction. It is assumed that these cations act by maintaining the pH during the photoreduction process, preventing the alkalization by hydrolysis of the solution. © 1990 Chapman and Hall Ltd.

U2 - 10.1007/BF01076066

DO - 10.1007/BF01076066

M3 - Article

VL - 20

SP - 518

EP - 521

JO - Journal of Applied Electrochemistry

JF - Journal of Applied Electrochemistry

SN - 0021-891X

IS - 3

ER -