Thermal Desorption Of A PAH-contaminated Soil: A Case Study
Author(s)
F. Renoldi, L. Lietti, S. Saponaro, L. Bonomo & P. Forzatti
Abstract
Thermal desorption of a PAH-contaminated
soil: a case study
F. ~enoldi', L. ~ i e t t i ~ , S. saponarol, L. ~onomo' & P. ~orzatti*
I Politecnico di Milano, Dipartimento IIAR - Sez. Ambientale, Italy
2 Politecnico di Milano, Dipartimento CMIC "Giulio Natta ", Italy
Abstract
Thermal desorption was tested to remediate a soil contaminated by PAHs
(Polycyclic Aromatic Hydrocarbons) from a former Manufacturing Gas Plant
site in northern Italy. Lab-scale experiments were carried out to assess the
feasibility of this technology; in particular, the minimum desorption temperature
required to reach the Italian soil standards was sought, as well as interferences of
the natural organic matter on the on-line process control, performed by a Flame
Ionization Detector (FID).
The matrix was a sandy gravel; experiments were carried out on the fraction
having particle size lower than 2 mrn, whose PAH contamination was nearly
2700 mgkg (total benzo-PAHs: 1100 mgkg), and the fraction of organic carbon
f,, 2.4% w/w
Keywords
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