Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Combining different frequencies for electrical heating of saturated and unsaturated soil zones
Autor Roland, U.; Holzer, F.; Kopinke, F.-D.;
Journal / Serie Chemical Engineering & Technology
Erscheinungsjahr 2011
Department TUCHEM;
Band/Volume 34
Heft 10
Sprache englisch;
Keywords Dielectric heating; Radio frequency; Resistive heating; Soil remediation; Soil vapor extraction
Abstract
In situ electrical heating of soil was studied applying different frequencies: low-frequency energy for resistive heating and radio-frequency energy for dielectric heating. Steep temperature gradients were observed for each heating mode under the condition of the coexistence of saturated and unsaturated soil zones. By combining the two heating modes, this undesired effect can be avoided, thus allowing efficient soil remediation especially when organic phases are accumulated at the capillary fringe. A parallel application of both frequencies was demonstrated as the most suitable method to reduce temperature gradients. By using electronic filters, both electric fields can be established by only one electrode array. This innovative concept is especially applicable for optimizing thermal remediation of light non-aqueous phase liquid contaminations or realizing thermally-enhanced electrokinetic removal of heavy metals.
ID 11600
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=11600
Roland, U., Holzer, F., Kopinke, F.-D. (2011):
Combining different frequencies for electrical heating of saturated and unsaturated soil zones
Chem. Eng. Technol. 34 (10), 1645 - 1651