Electrokinetic extraction of heavy metals from dredged marine sediment

Kim, Kyung-Jo; Kim, Do-Hyung; Yoo, Jong‐Shin; Baek, Kitae

doi:10.1016/j.seppur.2011.02.010

Cited by 108 publications

(54 citation statements)

References 26 publications

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“…This is in agreement with the findings of Orecchio and Polizzotto [6]. Observed Hg-speciation further confirms that Hg-removal is a main challenge and its removal processes using conventional chemical-physical techniques could be strictly inhibited [30]. On the other hand, the high water amount and dielectric properties of sediments could make MWH a perfect candidate to successfully desorb Hg from marine sediments.…”

Section: Sediment Characterization and Hg-speciationsupporting

confidence: 91%

“…Synthetic chelates, such as ethylenediamine tetraacetic acid (EDTA) or diethylene triamine pentaacetic acid (DTPA), have largely been employed as enhancing agents in washing [29], EK [30][31][32][33] or phytoextraction [34] treatments. However, they have a relatively high environmental persistence and toxicity as well as a thermal instability at high temperatures [35].…”

Section: Introductionmentioning

confidence: 99%

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Remediation of Hg-contaminated marine sediments by simultaneous application of enhancing agents and microwave heating (MWH)

Falciglia

Malarbì

Maddalena

et al. 2017

Chemical Engineering Journal

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This version is available at https://strathprints.strath.ac.uk/60331/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. AbstractThe aim of this work was to investigate Hg removal ability of a novel microwave heating (MWH) treatment for marine sediment remediation enhanced by the application of several agents, biodegradable complexing agent (methylglycinediacetic acid, MGDA), surfactant (Tween ® 80), and citric acid. Main results revealed that MWH allowed a very rapid heating (~450 °C in 7 min) of the irradiated medium. However, without the addition of enhancing agents, a maximum Hg removal of ~72% can be achieved. The application of MGDA led to a higher contaminant removal of ~87% (residual concentration = 5.4 mg kg -1 ). For the treatment including the simultaneous addition of both chelating agent and surfactant, their synergetic action and stripping processes resulted in a very high Hg removal of ~99% for an irradiation time of 7 min, corresponding to a residual concentration of 0.56 mg kg -1 , which is lower than the Italian regulatory limit of 1 mg kg -1 . The use of citric acid resulted in a shortening of the removal kinetics, which allowed the successful application of a shorter remediation time of 5 min. The observed strong passive ability of sediments to convert a microwave irradiation energy into a rapid and large temperature increase undoubtedly represents a key factor in the whole remediation process, making the studied treatment an excellent choice. Kinetic data are suitable for a preliminarily assessment of the effectiveness of clean-up activities, and as basis for future scaling-up studies on MWH of Hgcontaminated sediments.

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Section: Sediment Characterization and Hg-speciationsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Remediation of Hg-contaminated marine sediments by simultaneous application of enhancing agents and microwave heating (MWH)

Falciglia

Malarbì

Maddalena

et al. 2017

Chemical Engineering Journal

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“…Several EKR and EDR studies of polluted sediments have shown limited removal of targeted heavy metals applying the traditional stationary set-up with removal efficiencies generally below 20% with a few exceptions of up to 40% [12,[19][20][21][22].…”

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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“…Suitable flushing solutions had to be selected in order to play different roles, in the context where PAHs and metals both existed in our studied aged model sediment: additives allowing to maintain an acidic pH (nitric acid, acetic acid…) or forming soluble complexes with metals (citric acid, EDTA…) proved to be effective for metal removal (Wang et al 2007;Giannis et al 2009;Alcantara et al 2010;Kim et al 2011). Furthermore, maintaining a basic pH (NaOH, n-butylamine…) or using solubilizing compounds such as surfactants (Tween 80, Igepal CA-720, sodium dodecyl sulfate, alkylpolyglucosides…) or cyclodextrins proved to be effective for PAH removal (Reddy et al 2006;Giannis et al 2007;Pazos et al 2010).…”

Section: Resultsmentioning

confidence: 99%

“…Electrokinetic (EK) remediation is accepted as one of the most suitable technologies for extracting metals from fine-grained sediments of low permeability (Kim et al 2011). Moreover, EK remediation is flexible and can be used as an in situ or ex-situ remediation system (Reddy 2010).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous electrokinetic removal of polycyclic aromatic hydrocarbons and metals from a sediment using mixed enhancing agents

Ammami

Benamar

Wang

et al. 2013

Int. J. Environ. Sci. Technol.

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The maintenance of harbor waterways generates large amounts of dredged sediments which are often rich in coexisting organic and inorganic contaminants. Electrokinetic remediation treatments have recently been developed for the simultaneous removal of heavy metals and polycyclic aromatic hydrocarbons (PAHs), using various enhancing agents generally tested sequentially. In this study, different processing fluids were tested, alone or mixed, to improve the decontamination of aged model sediment contaminated with cadmium, lead, chromium, copper, zinc, and five PAHs. Nitric acid (NA) and citric acid (CA) were tested to avoid the formation of an alkaline front into the sediment and favor the metals removal, while an anionic surfactant [sodium dodecyl sulfate (SDS)] and a nonionic surfactant (Tween 20) were tested to solubilize and mobilize PAHs. Processing fluids were circulated under a constant voltage gradient of 1 V cm -1 for 10-14 days. NA showed an excellent potential to remove metals (76.8-99.9 % removal) and PAHs (70.3-89.7 % removal) in a single run. Besides, the mixture of Tween 20 and CA, more environmental friendly, could be considered as a relatively good processing fluid for the simultaneous removal of metals (10.3-90.8 % removal) and PAHs (53.6-61.6 % removal) from the fine-grained sediment, while SDS mixed to CA was not a good candidate for this purpose (0.1-65 % removal for metals and 34.1-41.0 % removal for PAHs).

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Electrokinetic extraction of heavy metals from dredged marine sediment

Cited by 108 publications

References 26 publications

Remediation of Hg-contaminated marine sediments by simultaneous application of enhancing agents and microwave heating (MWH)

Remediation of Hg-contaminated marine sediments by simultaneous application of enhancing agents and microwave heating (MWH)

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

Simultaneous electrokinetic removal of polycyclic aromatic hydrocarbons and metals from a sediment using mixed enhancing agents

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