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2014 | OriginalPaper | Buchkapitel

9. In Situ Photocatalytic Reduction for Contaminated Soil with Hexavalent Chromium by Titanium Dioxide

verfasst von : A. López–Vásquez, N. Ramirez, R. López–Vásquez

Erschienen in: Transactions on Engineering Technologies

Verlag: Springer Netherlands

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Abstract

The photocatalytic reduction of hexavalent chromium was conducted in laboratory environment in order to evaluate the alternative use of this technology for in situ decontamination. The soil samples used had initial concentrations of Cr(VI) of 651.0, 308.0 and 112.0 mg kg−1, with loads of catalyst TiO2 which were exposed to UV irradiation through black light. Different loads of catalyst of 0.1–2 % (w/w) were tested in soil contaminated by hexavalent chromium with a concentration of 651 mg kg−1 for a period of 88 h of exposure. In addition, we examined the effect of alkalinity Ca(OH)2 (10 % w/w). The rise in the pH due to Ca(OH)2 addition shows no measurable effect on the chromium reduction. The photocatalytic remediation using TiO2 combined with UV light showed their effectiveness in the reduction of Cr(VI) at 2.0, 4.0 and 6.0 cm of depth of contaminated soil, moreover also showed mobility of the contaminant towards to surface.

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Metadaten
Titel
In Situ Photocatalytic Reduction for Contaminated Soil with Hexavalent Chromium by Titanium Dioxide
verfasst von
A. López–Vásquez
N. Ramirez
R. López–Vásquez
Copyright-Jahr
2014
Verlag
Springer Netherlands
DOI
https://doi.org/10.1007/978-94-017-9115-1_9

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