Remediation of contaminated marine sediment using electrokinetic–Fenton technology

Pazos, Marta; Iglesias, Olalla; Gómez, J. M. G.; Rosales, Emílio; Sanromán, M.A.

doi:10.1016/j.jiec.2012.11.010

Cited by 66 publications

(16 citation statements)

References 39 publications

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“…Indeed, redox potentials were measured in the model sediment specimen at the end of each test (data not shown) and oxidative conditions were predominant, except when NaCl was added into the processing fluid. It is well-known that oxidative conditions promote in situ degradation of organic compounds (Pazos et al 2013). It appeared that the highest values of redox potential were obtained after treatments with NA, particularly towards the cathode.…”

Section: Removal Of Pahsmentioning

confidence: 93%

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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Section: Removal Of Pahsmentioning

confidence: 93%

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 range depended on the nature of the slurry (Hg pollution ranging from 20 to 200 ppm). Relatively low Hg removal was also found by treating marine sediments with EK despite the initial Hg content being very low (1.17 mg kg −1 ) [11]. Authors reported the highest removal of ~46% when EK was applied for 30 days (voltage = 3 V cm -1 ) using H2O2 and EDTA solution as processing fluids.…”

Section: Comparison To Other Clean-up Alternativesmentioning

confidence: 99%

“…The unsuitability of the traditional management strategies, such as landfill disposal, makes the possibility to remedy Hg-contaminated sediments a key factor in term of social sustainability, and at the same time, a great challenge for scientific communities and society in general [9,10]. However marine sediment characteristics (fine texture, low permeability jointly with a high salinity and organic, sulphide and water content) make their remediation using conventional methods very difficult [11]. Limited techniques have been reported to treat heavy metal-contaminated sediments, such as washing, disposal and stabilisation/solidification.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the methylglycinediacetic acid (MGDA) is a relatively novel chelate, much more biodegradable than others jointly with the essential advantage of having a stable thermal behaviour under a wide range of temperatures [35]. Likewise, surfactants with low toxicity and favourable biodegradability, such as Polyoxyethylene (20) sorbitan monooleate, also known as Tween ® 80 [36,37], have been extensively used in organic and inorganic contaminant removal treatments [11,38,39].…”

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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“…[7,13,18] Because of these purposes, removal of some hydrocarbon using hydrogen peroxide in catalyzed system [19,20] with goethite [21] or stabilizers and chelating agents [22,23] is developed. Moreover, in some researches, Fenton or modified Fenton treatment is combined with other methods such as sonication, [24][25][26] ultraviolet radiation, [27,28] electrokinetic treatment, [29][30][31][32] biological treatment, [33,34] physical treatment using cyclodextrin, surfactant, cosolvent, and vegetable oil [35][36][37][38] in order to increasing the efficiency of contaminant removal.…”

Section: Introductionmentioning

confidence: 99%

Rapid degradation of contaminated soil with 2‐methylpropane‐2‐thiol by H₂O₂/KMnO₄/NaClO system: process modeling and optimization

Roohi

Fatehifar

Alizadeh

2016

Asia-Pacific J Chem Eng

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2-Methylpropane-2-thiol is a hazardous material, and remediation of soil polluted by this contaminant with a fast method is important to study.In this study, H 2 O 2 /KMnO 4 /NaClO system as a combined system is investigated for 2-methylpropane-2-thiol oxidation because of especial characteristics of each oxidation agent. Central composite design based on response surface methodology was used to obtain appropriate effects of the main factors (initial oxidant concentrations and FeSO 4 to soil ratio) and their interactions on the removal efficiency. Pareto analysis show that initial H 2 O 2 concentration, FeSO 4 to soil ratio, initial NaClO concentration, and interaction between H 2 O 2 and FeSO 4 are the most influential factors on 2-methylpropane-2-thiol removal efficiency (31.82%, 16.85%, 16.24%, and 8.62% respectively). P-value of lack-of-fit (0.621) indicates that suggested model adequately fits the data with high correlation coefficient (R 2 = 97.59%). Investigation of optimum condition suggests that interaction of KMnO 4 with H 2 O 2 drops the removal efficiency and its concentration has to be as low as possible. The concentration of other studied oxidation agents and Fe 2+ ion must be as high as possible in the studied intervals. Verification experiment at optimum condition shows 95.71% for maximum 2-methylpropane-2-thiol removal efficiency that is a good agreement with the predicted value (94.76%).

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Remediation of contaminated marine sediment using electrokinetic–Fenton technology

Cited by 66 publications

References 39 publications

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

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

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

Rapid degradation of contaminated soil with 2‐methylpropane‐2‐thiol by H₂O₂/KMnO₄/NaClO system: process modeling and optimization

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Remediation of contaminated marine sediment using electrokinetic–Fenton technology

Cited by 66 publications

References 39 publications

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

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

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

Rapid degradation of contaminated soil with 2‐methylpropane‐2‐thiol by H2O2/KMnO4/NaClO system: process modeling and optimization

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Rapid degradation of contaminated soil with 2‐methylpropane‐2‐thiol by H₂O₂/KMnO₄/NaClO system: process modeling and optimization