Conference paper · Journal article
Electrodialytic remediation of heavy metal polluted soil: treatment of water saturated or suspended soil
Department of Civil Engineering, Technical University of Denmark1
Section for Construction Materials, Department of Civil Engineering, Technical University of Denmark2
Section for Geotechnics and Geology, Department of Civil Engineering, Technical University of Denmark3
Escola Superior Agrária de Coimbra4
Universidad Técnica Federico Santa Maria5
Electrodialytic soil remediation is a method for removal of heavy metals. Good results have previously been obtained with both treatment of a stationary, water saturated soil matrix and with remediation of a stirred suspension of soil in water. The two different setups have different uses. The first as in-situ or on-site treatment when there is no requirement for fast remediation, as the removal rate of the heavy metals are dependent on the distance between the electrodes (everything else equal) and in such application the electrode spacing must have a certain distance (often meters).
In the stirred setup it is possible to shorten the transport route to few mm and to have a faster and continuous process. The present paper for the first time reports a direct comparison of the two options. The remediation of the stirred suspension showed faster than remediation of the water saturated soil even without a short distance between the membranes.
The acidification of the suspended soil was fastest and following the mobilization of heavy metals. This may indicate that water splitting at the anion exchange membrane is used more efficiently in the stirred setup.
Language: | English |
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Publisher: | AIDIC |
Year: | 2012 |
Pages: | 103-108 |
Proceedings: | Bosicon |
ISBN: | 8895608194 and 9788895608198 |
ISSN: | 19749791 and 22839216 |
Types: | Conference paper and Journal article |
DOI: | 10.3303/CET1228018 |
ORCIDs: | Ottosen, Lisbeth M. , Jensen, Pernille Erland and Kirkelund, Gunvor Marie |