Simultaneous electrodialytic removal of PAH, PCB, TBT and heavy metals from sediments
Journal of Environmental Management ()
1 Akvaplan-niva (nåværende ansatt)
Forfattere (4)
- Kristine B. Pedersen
- Tore Lejon
- Pernille E. Jensen
- Lisbeth M. Ottosen
Description
Accepted manuscript version, licensed CC-BY-NC-ND 4.0. Published version available in Journal of Environmental Management (2017), 198, 192-202.
Abstract
Contaminated sediments are remediated in order to protect human health and the environment,with the additional benefit of using the treated sediments for other activities. Common for manypolluted sediments is the contamination with several different pollutants, making remediationchallenging with the need of different remedial actions for each pollutant. In this study,electrodialytic remediation (EDR) of sediments was found effective for simultaneous removal ofheavy metals and organic pollutants for sediments from Arctic regions – Sisimiut in Greenland andHammerfest in Norway. The influence of sediment properties and experimental settings on theremediation process was studied by employing multivariate analysis. The importance of the variablesstudied varied with the pollutant and based on these results it was possible to assess removalprocesses for the different pollutants. Desorption was found to be important for the removal ofheavy metals and TBT, while photolysis was significant for removal of PAH, PCB and TBT. In addition,dechlorination was found to be important for the removal of PCB. The highest removal efficiencieswere found for heavy metals, TBT and PCB (>40%) and lower removal efficiencies for PAH (<35%).