Kinetics of electrodialytic extraction of Pb and soil cations from a slurry of contaminated soil fines

Jensen, Pernille Erland; Ottosen, Lisbeth M.; Dias-Ferreira, Célia; Villumsen, Arne

doi:10.1016/j.jhazmat.2006.05.073

Cited by 27 publications

(20 citation statements)

References 10 publications

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“…Based on a kinetics study on the electrodialytic removal of Al, Fe, Ca, K, Mg, Mn and Pb from an industrially polluted soil [18]; the removal of a given metal during EDR can be divided into four phases:…”

Section: Multivariate Design and Modellingmentioning

confidence: 99%

Screening of variable importance for optimizing electrodialytic remediation of heavy metals from polluted harbour sediments

Pedersen

Lejon

Ottosen

et al. 2015

Environmental Technology

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Section: Multivariate Design and Modellingmentioning

confidence: 99%

Screening of variable importance for optimizing electrodialytic remediation of heavy metals from polluted harbour sediments

Pedersen

Lejon

Ottosen

et al. 2015

Environmental Technology

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“…It is interesting to note that the least efficient removal of both heavy metals and trace elements are encountered in the 2-compartment cell (experiment 5). In this part of the experimental domain it appears that many of the heavy metals are still in the lag phase of the electrodialytic removal [36] in which there is limited removal of the given metal. The same part of the experimental domain is not covered by the 3-compartment cell experiments and no direct comparison is possible.…”

Section: Electrodialytic Experimentsmentioning

confidence: 99%

“…The PLS model correlation factor R2Y was 0.91 and the predictive power, Q2, was 0.24. The fairly low predictive indicated too large an experimental domain, in which several electrodialytic removal phases [36] (different removal rates) were covered, or that the model included metals not behaving similarly. The model results can however be used for retrieving indicative and general trends.…”

Section: Pls Model For the 2-compartment Cellmentioning

confidence: 99%

An optimised method for electrodialytic removal of heavy metals from harbour sediments

Pedersen

Jensen

Ottosen

et al. 2015

Electrochimica Acta

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“…In the present study, extending the duration from 10 to 14 days did not have a great impact on the removal of Cd from raw ashes in the three-compartment EDR cell (experiments E1 and E3), so the remediation could be conducted in less than 10 days under the same conditions. The duration between 10 and 14 days, on the other hand, affected the removal of Cu, Pb and Zn, and the results (Table 4) imply that a longer duration can reduce the content of Pb and Cu; this has also been seen in EDR treatment of contaminated soils [27,28]. The goal of remediation, therefore, determines the duration.…”

Section: Overall Removalmentioning

confidence: 90%

Electrodialytic remediation of fly ash from co-combustion of wood and straw

Chen

Jensen

Ottosen

et al. 2015

Electrochimica Acta

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The heavy metal content in fly ash from biomass combustion, such as straw, wood and sludge, often needs reducing before the ash can be used as fertilizer for agricultural land or as a component in the production of construction materials. In this study, fly ash from a boiler fueled with wood chips and straw was treated either by electrodialytic remediation (EDR) directly or by a combination of EDR and pre-wash with distilled water to investigate the possibilities of reducing the heavy metal content and reusing nutrients as fertilizer and bulk material in construction materials. Different experimental set-ups were tested for EDR treatment primarily of Cd and Pb as well as of Cu and Zn.Elemental contents such as K, P and Ni were compared in ash samples before and after treatment.The results showed that pre-washing caused an increase in total concentrations of most heavy metals because the highly soluble fraction, mainly KCl and K 2 SO 4 , was removed. After EDR treatment, the Cd concentration was reduced to below 2 mg kg -1 in all ash samples with high and stable average removal of above 95%, no matter how high the initial concentration was. The amount of Pb removed varied from 12% to 67%. Even though Pb was extracted from the ash samples, its concentrations in the treated ash samples were elevated due to the ash dissolution, except in the case of pre-washed ash treated in a two-compartment EDR cell, where the mass of Pb removed was the highest with a final concentration of about 100 mg kg -1 . The two-compartment EDR cell probably performed better due to a fast acidification process. In addition, this process was less energy-consuming. However, the fast acidification did in turn affect the leaching property of the treated ash, such as As and Ni, exceeding the limiting concentrations. The EDR/pre-wash-EDR treated ash mainly contained quartz, and the X-ray diffraction (XRD) peaks of K salts had disappeared. This shows that the potassium fertilizer potential was lost in the treated ashes, but the quartz mineral is beneficial in construction materials, such as ceramics. The K fertilizer could be recovered from the water after pre-washing and also from the catholyte through chemical operations, including a separation step.

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Kinetics of electrodialytic extraction of Pb and soil cations from a slurry of contaminated soil fines

Cited by 27 publications

References 10 publications

Screening of variable importance for optimizing electrodialytic remediation of heavy metals from polluted harbour sediments

Screening of variable importance for optimizing electrodialytic remediation of heavy metals from polluted harbour sediments

An optimised method for electrodialytic removal of heavy metals from harbour sediments

Electrodialytic remediation of fly ash from co-combustion of wood and straw

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