Leaching of VOCs from cement-based stabilized/solidified refinery oily sludge using solid phase microextraction

A. K. Karamalidis, E. A. Voudrias

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5 Scopus citations


Cement-based Stabilization/Solidification was applied to refinery oily sludge. Zero Headspace Extraction was employed for the investigation of the leaching behavior of volatile organic compounds from untreated and stabilized/solidified oily sludge in water. A method is described combining zero headspace extraction, solid phase microextraction and gas chromatography with flame ionization detector for determination of volatile organic compounds in aqueous leachates. For stabilization/ solidification of the waste, two types of cement were used, I42.5 and II42.5. The I42.5 is a Portland Cement whereas the II42.5 is a Blended Cement, which contains pozzolanic material. In general, the I42.5 cement showed better immobilizing characteristics than the II42.5 cement, but the difference was small. The leaching behavior of toluene, o-xylene, p,m-xylene and ethylbenzene from stabilized/solidified samples was similar for both types of cement. The reduction in the maximum leached amount of stabilized/solidified specimens compared with that of the untreated oily sludge alone, varied from 80% to 98%, for specimens with 10% cement addition (both types). Increased leaching was observed with increasing cement addition. In the case of naphthalene, stabilized/ solidified samples leached more than threefold the amount leached from the untreated oily sludge alone.

Original languageEnglish (US)
Pages (from-to)1173-1185
Number of pages13
JournalEnvironmental Technology
Issue number10
StatePublished - Oct 2007

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal


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