Abstract
Comparisons of cell and stack designs for the electrodialytic removal of heavy metals from two harbour sediments, were made. Multivariate modelling showed that sediment properties and experimental set-ups had the highest influence on the heavy metal removal indicating that they should be modelled and analysed separately. Clean-up levels of Cu, Pb and Zn were significantly higher for the cell designs, implying that longer time and relatively more electric charge and energy would be necessary to achieve similar clean-up levels in the stack design experiments.In the studied experimental domain, the optimal current density for the 2- and 3-compartment cells was 0.12mA/cm2 (center value) removing the highest quantity of Cu, Pb and Zn per Wh. The highest percentages removed were 82% Cu, 81% Pb and 92% Zn were however achieved at higher current density. For the stack experiments conducted at same electric charge per unit sediment, energy consumption was a magnitude higher and the highest clean-up levels were 21% Cu, 42% Pb and 73% Zn.
Original language | English |
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Journal | Electrochimica Acta |
Volume | 181 |
Pages (from-to) | 48-57 |
Number of pages | 10 |
ISSN | 0013-4686 |
DOIs | |
Publication status | Published - 2015 |
Event | 13th International Symposium on Electrokinetic Remediation - Málaga, Spain Duration: 7 Sept 2014 → 10 Sept 2014 Conference number: 13 http://www.erem2014.uma.es/ |
Conference
Conference | 13th International Symposium on Electrokinetic Remediation |
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Number | 13 |
Country/Territory | Spain |
City | Málaga |
Period | 07/09/2014 → 10/09/2014 |
Internet address |
Keywords
- Electrodialysis
- Electrokinetics
- Harbour sediments
- Heavy metals
- Remediation