Now showing items 1-7 of 7

    • Chemometric analysis for pollution source assessment of harbour sediments in Arctic locations 

      Pedersen, Kristine Bondo; Lejon, Tore; Jensen, Pernille E.; Ottosen, Lisbeth M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-04-16)
      Pollution levels, pollutant distribution and potential source assessments based on multivariate analysis (chemometrics) were made for harbour sediments from two Arctic locations; Hammerfest in Norway and Sisimiut in Greenland. High levels of heavy metals were detected in addition to organic pollutants. Preliminary assessments based on Principal Component Analysis (PCA) revealed different sources and ...
    • Comparison of 2-compartment, 3-compartment and stack designs for electrodialytic removal of heavy metals from harbour sediments 

      Pedersen, Kristine Bondo; Ottosen, Lisbeth M.; Jensen, Pernille E.; Lejon, Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-01)
      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, ...
    • Degradation of oil products in a soil from a Russian Barents hot‑spot during electrodialytic remediation 

      Pedersen, Kristine Bondo; Lejon, Tore; Jensen, Pernille E.; Ottosen, Lisbeth M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-02-24)
      A highly oil-polluted soil from Krasnoe in North-West Russia was used to investigate the degradation of organic pollutants during electrodialytic remediation. Removal efficiencies were up to 70 % for total hydrocarbons (THC) and up to 65 % for polyaromatic hydrocarbons (PAH). Relatively more of the lighter PAH compounds and THC fractions were degraded. A principal component analysis (PCA) revealed ...
    • The influence of sediment properties and experimental variables on the efficiency of electrodialytic removal of metals from sediment 

      Pedersen, Kristine Bondo; Lejon, Tore; Jensen, Pernille E.; Ottosen, Lisbeth M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-16)
      <p>Chemometrics was used to determine the influence of sediment properties and experimental settings for the electrodialytic removal (EDR) of Cu, Pb and Zn from six harbour sediments from Greenland and Norway. A Projection onto latent structures (PLS) model revealed that the most important sediment properties for achieving acidification (lag-phase, pH > 4), necessary for desorbing and mobilising ...
    • Multivariate methods for evaluating the efficiency of electrodialytic removal of heavy metals from polluted harbour sediments 

      Pedersen, Kristine Bondo; Kirkelund, Gunvor M.; Ottosen, Lisbeth M.; Jensen, Pernille E.; Lejon, Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-02-11)
      Chemometrics was used to develop a multivariate model based on 46 previously reported electrodialytic remediation experiments (EDR) of five different harbour sediments. The model predicted final concentrations of Cd, Cu, Pb and Zn as a function of current density, remediation time, stirring rate, dry/wet sediment, cell set-up as well as sediment properties. Evaluation of the model showed that ...
    • An optimised method for electrodialytic removal of heavy metals from harbour sediments 

      Pedersen, Kristine Bondo; Jensen, Pernille E.; Ottosen, Lisbeth M.; Lejon, Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-10)
      A 2-compartment electrodialytic cell set-up for treatment of solid materials has in many respects proven superior to other types of cells in removing heavy metals from sediments. Most notably, remediation times were shorter, energy consumption was lower and higher removal efficiencies were observed. By employing multivariate modelling and investigating additional experimental variables, the ...
    • Screening of variable importance for optimizing electrodialytic remediation of heavy metals from polluted harbour sediments 

      Pedersen, Kristine Bondo; Lejon, Tore; Ottosen, Lisbeth M.; Jensen, Pernille E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-04-15)
      Using multivariate design and modelling, optimal conditions for electrodialytic remediation (EDR) of heavy metals were determined for polluted harbour sediments from Hammerfest harbour located in the geographic Arctic region of Norway. The comparative importance of the variables; current density, remediation time, light/no light, the liquid-solid ratio and stirring rate of the sediment suspension ...