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

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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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Author information

Authors and Affiliations

  1. Environmental Engineering Department, Universidad Libre, Cra. 70 #53-40, Of. A 208, Bogota, Colombia

    A. López–Vásquez & N. Ramirez

  2. Chemical Engineering School, Universidad del Valle, Cl. 13 #100-00, Ed. 336, Cali, Colombia

    A. López–Vásquez

  3. Faculty of Engineering, Engineering Department, Universidad de Caldas, Cl. 65 #26-10, Manizales, Colombia

    R. López–Vásquez

Authors
  1. A. López–Vásquez
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  2. N. Ramirez
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  3. R. López–Vásquez
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Corresponding author

Correspondence to A. López–Vásquez .

Editor information

Editors and Affiliations

  1. Computer & Communication, Catholic University of DaeGu, DaeGu, Korea, Republic of (South Korea)

    Haeng Kon Kim

  2. IAENG Secretariat, International Association of Engineers, Hong Kong, Hong Kong SAR

    Sio-Iong Ao

  3. College of Engineering, California State Polytechnic University, Pomona, California, USA

    Mahyar A. Amouzegar

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López–Vásquez, A., Ramirez, N., López–Vásquez, R. (2014). In Situ Photocatalytic Reduction for Contaminated Soil with Hexavalent Chromium by Titanium Dioxide. In: Kim, H., Ao, SI., Amouzegar, M. (eds) Transactions on Engineering Technologies. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9115-1_9

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  • DOI: https://doi.org/10.1007/978-94-017-9115-1_9

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-017-9114-4

  • Online ISBN: 978-94-017-9115-1

  • eBook Packages: EngineeringEngineering (R0)

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