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