Environmental Science and Pollution Research

, Volume 21, Issue 18, pp 11017–11026

Impact of clay mineral on air oxidation of PAH-contaminated soils

  • Coralie Biache
  • Olivier Kouadio
  • Catherine Lorgeoux
  • Pierre Faure
Research Article

DOI: 10.1007/s11356-014-2966-9

Cite this article as:
Biache, C., Kouadio, O., Lorgeoux, C. et al. Environ Sci Pollut Res (2014) 21: 11017. doi:10.1007/s11356-014-2966-9

Abstract

This work investigated the impact of a clay mineral (bentonite) on the air oxidation of the solvent extractable organic matters (EOMs) and the PAHs from contaminated soils. EOMs were isolated from two coking plant soils and mixed with silica sand or bentonite. These samples, as well as raw soils and bentonite/soil mixtures, were oxidized in air at 60 and 100 °C for 160 days. Mineralization was followed by measuring the CO2 produced over the experiments. EOM, polycyclic aromatic compound (PAC), including PAH, contents were also determined. Oxidation led to a decrease in EOM contents and PAH concentrations, these diminutions were enhanced by the presence of bentonite. Transfer of carbon from EOM to insoluble organic matter pointed out a condensation phenomenon leading to a stabilization of the contamination. Higher mineralization rates, observed during the oxidation of the soil/bentonite mixtures, seem to indicate that this clay mineral had a positive influence on the transformation of PAC into CO2.

Keywords

PAH Polycyclic aromatic compound (PAC) Oxygenated PAC Low temperature oxidation Clay mineral Remediation treatment Bentonite 

Supplementary material

11356_2014_2966_MOESM1_ESM.pdf (64 kb)
ESM1(PDF 63 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Coralie Biache
    • 1
    • 2
  • Olivier Kouadio
    • 1
    • 2
  • Catherine Lorgeoux
    • 3
    • 4
  • Pierre Faure
    • 1
    • 2
  1. 1.Université de Lorraine, LIEC, UMR7360Vandœuvre-lès-NancyCedexFrance
  2. 2.LIEC, Faculté des Sciences et TechniquesVandoeuvre-lès-NancyCedexFrance
  3. 3.Université de Lorraine, GeoRessources, UMR7359Vandœuvre-lès-NancyCedexFrance
  4. 4.CNRS, GeoRessources, UMR7359Vandœuvre-lès-NancyCedexFrance

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